CODES

ADOPTS WITH AMENDMENTS:

International Plumbing Code 2015 (IPC 2015)

Chapter 1 Scope and Administration

Chapter 2 Definitions

Chapter 3 General Regulations

Chapter 4 Fixtures, Faucets and Fixture Fittings

Chapter 5 Water Heaters

Chapter 6 Water Supply and Distribution

Chapter 7 Sanitary Drainage

Chapter 8 Indirect/Special Waste

Chapter 9 Vents

Chapter 10 Traps, Interceptors and Separators

Chapter 11 Storm Drainage

Chapter 12 Special Piping and Storage Systems

Chapter 13 Nonpotable Water Systems

Chapter 14 Subsurface Landscape Irrigation Systems

Chapter 15 Referenced Standards

Appendix A Plumbing Permit Fee Schedule

Appendix B Rates of Rainfall for Various Cities

Appendix C Structural Safety

Appendix D Degree Day and Design Temperatures

Appendix E Sizing of Water Piping System

1301.1 Scope

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The provisions of Chapter 13 shall govern the materials, design, construction and installation of systems for the collection, storage, treatment and distribution of nonpotable water. The use and application of nonpotable water shall comply with laws, rules and ordinances applicable in the jurisdiction.

1301.2 Water Quality

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water for each end use application shall meet the minimum water quality requirements as established for the intended application by the laws, rules and ordinances applicable in the jurisdiction. Where nonpotable water from different sources is combined in a system, the system shall comply with the most stringent of the requirements of this code that are applicable to such sources.

1301.2.1 Residual Disinfectants

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where chlorine is used for disinfection, the nonpotable water shall contain not more than 4 ppm (4mg/L) of chloramines or free chlorine when tested in accordance with ASTM D 1253. Where ozone is used for disinfection, the nonpotable water shall not contain gas bubbles having elevated levels of ozone at the point of use.

Exception: Reclaimed water sources shall not be required to comply with these requirements.

1301.2.2 Filtration Required

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water utilized for water closet and urinal flushing applications shall be filtered by a 100-micron or finer filter.

Exception: Reclaimed water sources shall not be required to comply with these requirements.

1301.3 Signage Required

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water outlets such as hose connections, open ended pipes and faucets shall be identified at the point of use for each outlet with signage that reads as follows: "Nonpotable water is utilized for [application name]. CAUTION: NONPOTABLE WATER ‒ DO NOT DRINK."The words shall be legibly and indelibly printed on a tag or sign constructed of corrosion-resistant waterproof material or shall be indelibly printed on the fixture. The letters of the words shall be not less than 0.5 inch (12.7 mm) in height and in colors in contrast to the background on which they are applied. In addition to the required wordage, the pictograph shown in Figure 1301.3 shall appear on the signage required by this section.



FIGURE 1301.3 PICTOGRAPH—DO NOT DRINK

1301.4 Permits

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Permits shall be required for the construction, installation, alteration and repair of nonpotable water systems. Construction documents, engineering calculations, diagrams and other such data pertaining to the nonpotable water system shall be submitted with each permit application.

1301.5 Potable Water Connections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where a potable system is connected to a nonpotable water system, the potable water supply shall be protected against backflow in accordance with Section 608.

1301.6 Approved Components and Materials

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Piping, plumbing components and materials used in collection and conveyance systems shall be manufactured of material approved for the intended application and compatible with any disinfection and treatment systems used.

1301.7 Insect and Vermin Control

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The system shall be protected to prevent the entrance of insects and vermin into storage tanks and piping systems. Screen materials shall be compatible with contacting system components and shall not accelerate the corrosion of system components.

1301.8 Freeze Protection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where sustained freezing temperatures occur, provisions shall be made to keep storage tanks and the related piping from freezing.

1301.9 Nonpotable Water Storage Tanks

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water storage tanks shall comply with Sections 1301.9.1 through 1301.9.11.

1301.9.1 Sizing

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The holding capacity of the storage tank shall be sized in accordance with the anticipated demand.

1301.9.2 Location

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be installed above or below grade. Above-grade storage tanks shall be protected from direct sunlight and shall be constructed using opaque, UV-resistant materials such as, but not limited to, heavily tinted plastic, fiberglass, lined metal, concrete, wood, or painted to prevent algae growth, or shall have specially constructed sun barriers including, but not limited to, installation in garages, crawl spaces or sheds. Storage tanks and their manholes shall not be located directly under soil piping, waste piping or any source of contamination.

1301.9.3 Materials

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where collected on site, water shall be collected in an approved tank constructed of durable, nonabsorbent and corrosion-resistant materials. The storage tank shall be constructed of materials compatible with any disinfection systems used to treat water upstream of the tank and with any systems used to maintain water quality in the tank. Wooden storage tanks that are not equipped with a makeup water source shall be provided with a flexible liner.

1301.9.4 Foundation and Supports

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be supported on a firm base capable of withstanding the weight of the storage tank when filled to capacity. Storage tanks shall be supported in accordance with the International Building Code.

1301.9.4.1 Ballast

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the soil can become saturated, an underground storage tank shall be ballasted, or otherwise secured, to prevent the tank from floating out of the ground when empty. The combined weight of the tank and hold down ballast shall meet or exceed the buoyancy force of the tank. Where the installation requires a foundation, the foundation shall be flat and shall be designed to support the weight of the storage tank when full, consistent with the bearing capability of adjacent soil.

1301.9.4.2 Structural Support

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where installed below grade, storage tank installations shall be designed to withstand earth and surface structural loads without damage and with minimal deformation when empty or filled with water.

1301.9.5 Makeup Water

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where an uninterrupted supply is required for the intended application, potable or reclaimed water shall be provided as a source of makeup water for the storage tank. The makeup water supply shall be protected against backflow in accordance with Section 608. A full-open valve located on the makeup water supply line to the storage tank shall be provided. Inlets to the storage tank shall be controlled by fill valves or other automatic supply valves installed to prevent the tank from overflowing and to prevent the water level from dropping below a predetermined point. Where makeup water is provided, the water level shall not be permitted to drop below the source water inlet or the intake of any attached pump.

1301.9.6 Overflow

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The storage tank shall be equipped with an overflow pipe having a diameter not less than that shown in Table 606.5.4. The overflow pipe shall be protected from insects or vermin and shall discharge in a manner consistent with storm water runoff requirements of the jurisdiction. The overflow pipe shall discharge at a sufficient distance from the tank to avoid damaging the tank foundation or the adjacent property. Drainage from overflow pipes shall be directed to prevent freezing on roof walkways. The overflow drain shall not be equipped with a shutoff valve. A cleanout shall be provided on each overflow pipe in accordance with Section 708.

1301.9.7 Access

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Not less than one access opening shall be provided to allow inspection and cleaning of the tank interior. Access openings shall have an approved locking device or other approved method of securing access. Below-grade storage tanks, located outside of the building, shall be provided with a manhole either not less than 24 inches (610 mm) square or with an inside diameter not less than 24 inches (610 mm). Manholes shall extend not less than 4 inches (102 mm) above ground or shall be designed to prevent water infiltration. Finished grade shall be sloped away from the manhole to divert surface water. Manhole covers shall be secured to prevent unauthorized access. Service ports in manhole covers shall be not less than 8 inches (203 mm) in diameter and shall be not less than 4 inches (102 mm) above the finished grade level. The service port shall be secured to prevent unauthorized access.

Exception: Storage tanks less than 800 gallons (3028 L) in volume and installed below grade shall not be required to be equipped with a manhole, but shall have a service port not less than 8 inches (203 mm) in diameter.

1301.9.8 Venting

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be provided with a vent sized in accordance with Chapter 9 and based on the aggregate diameter of all tank influent pipes. The reservoir vent shall not be connected to sanitary drainage system vents. Vents shall be protected from contamination by means of an approved cap or U-bend installed with the opening directed downward. Vent outlets shall extend not less than 4 inches (102 mm) above grade or as necessary to prevent surface water from entering the storage tank. Vent openings shall be protected against the entrance of vermin and insects in accordance with the requirements of Section 1301.7.

1301.9.9 Draining of Tanks

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where tanks require draining for service or cleaning, tanks shall be drained by using a pump or by a drain located at the lowest point in the tank. The tank drain pipe shall discharge as required for overflow pipes and shall not be smaller in size than specified in Table 606.5.7. Not less than one cleanout shall be provided on each drain pipe in accordance with Section 708.

1301.9.10 Marking and Signage

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Each nonpotable water storage tank shall be labeled with its rated capacity. The contents of storage tanks shall be identified with the words "CAUTION: NONPOTABLE WATER ‒ DO NOT DRINK."Where an opening is provided that could allow the entry of personnel, the opening shall be marked with the words, "DANGER ‒ CONFINED SPACE."Markings shall be indelibly printed on the tank or on a tag or sign constructed of corrosion-resistant waterproof material that is mounted on the tank. The letters of the words shall be not less than 0.5 inch (12.7 mm) in height and shall be of a color in contrast with the background on which they are applied.

1301.9.11 Storage Tank Tests

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be tested in accordance with the following:

Storage tanks shall be filled with water to the overflow line prior to and during inspection. All seams and joints shall be left exposed and the tank shall remain water tight without leakage for a period of 24 hours.

1. After 24 hours, supplemental water shall be introduced for a period of 15 minutes to verify proper drainage of the overflow system and that there are no leaks.

2. The tank drain shall be observed for proper operation.

3. The makeup water system shall be observed for proper operation and successful automatic shutoff of the system at the refill threshold shall be verified.

1301.10 System Abandonment

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
If the owner of an on-site nonpotable water reuse system or rainwater collection and conveyance system elects to cease use of, or fails to properly maintain such system, the system shall be abandoned and shall comply with the following:

1. All system piping connecting to a utility-provided water system shall be removed or disabled.

2. The distribution piping system shall be replaced with an approved potable water supply piping system. Where an existing potable pipe system is already in place, the fixtures shall be connected to the existing system.

3. The storage tank shall be secured from accidental access by sealing or locking tank inlets and access points, or filling with sand or equivalent.

1301.11 Trenching Requirements for Nonpotable Water Piping

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water collection and distribution piping and reclaimed water piping shall be separated from the building sewer and potable water piping underground by 5 feet (1524 mm) of undisturbed or compacted earth. Nonpotable water collection and distribution piping shall not be located in, under or above cesspools, septic tanks, septic tank drainage fields or seepage pits. Buried nonpotable water piping shall comply with the requirements of Section 306.

Exceptions:

1. The required separation distance shall not apply where the bottom of the nonpotable water pipe within 5 feet (1524 mm) of the sewer is not less than 12 inches (305 mm) above the top of the highest point of the sewer and the pipe materials conform to Table 702.3.

2. The required separation distance shall not apply where the bottom of the potable water service pipe within 5 feet (1524 mm) of the nonpotable water pipe is a minimum of 12 inches (305 mm) above the top of the highest point of the nonpotable water pipe and the pipe materials comply with the requirements of Table 605.4.

3. Nonpotable water pipe is permitted to be located in the same trench with a building sewer, provided that such sewer is constructed of materials that comply with the requirements of Table 702.2.

4. The required separation distance shall not apply where a nonpotable water pipe crosses a sewer pipe, provided that the pipe is sleeved to at least 5 feet (1524 mm) horizontally from the sewer pipe centerline on both sides of such crossing, with pipe materials that comply with Table 702.2.

5. The required separation distance shall not apply where a potable water service pipe crosses a nonpotable water pipe, provided that the potable water service pipe is sleeved for a distance of at least 5 feet (1524 mm) horizontally from the centerline of the nonpotable pipe on both sides of such crossing, with pipe materials that comply with Table 702.2.

6. Irrigation piping located outside of a building and downstream of the backflow preventer is not required to meet the trenching requirements where nonpotable water is used for outdoor applications.

1301.12 Outdoor Outlet Access

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Sillcocks, hose bibbs, wall hydrants, yard hydrants and other outdoor outlets supplied by nonpotable water shall be located in a locked vault or shall be operable only by means of a removable key.

1301.1 Scope

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The provisions of Chapter 13 shall govern the materials, design, construction, and installation of nonpotable water systems subject to this code. In addition to the applicable provision of this section, reclaimed water shall comply with the requirements of Section 1304.

1301.1.1 Design of nonpotable water systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
All portions of nonpotable water systems subject to this code shall be constructed using the same standards and requirements for the potable water systems or drainage systems as provided for in this code unless otherwise specified in this chapter.

1301.2 Makeup water

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Makeup water shall be provided for all nonpotable water supply systems. The makeup water system shall be designed and installed to provide supply of water in the amounts and at the pressures specified in this code. The makeup water supply shall be potable and be protected against backflow in accordance with the applicable requirements of Section 608.

1301.2.1 Makeup water sources

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Potable water shall be provided as makeup water for reclaimed water systems. Nonpotable water shall be permitted to serve as makeup water for gray water and rainwater systems.

1301.2.2 Makeup water supply valve

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
A full-open valve shall be provided on the makeup water supply line.

1301.2.3 Control valve alarm

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Makeup water systems shall be fitted with a warning mechanism that alerts the user to a failure of the inlet control valve to close correctly. The alarm shall activate before the water within the storage tank begins to discharge into the overflow system.

1301.3 Sizing

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water distribution systems shall be designed and sized for peak demand in accordance with approved engineering practice methods that comply with the applicable provisions of Chapter 6.

1301.4 Signage required

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
All nonpotable water outlets, other than water closets and urinals, such as hose connections, open ended pipes, and faucets shall be identified at the point of use for each outlet with signage that reads as follows: “Nonpotable water is utilized for (insert application name). Caution: nonpotable water. DO NOT DRINK.” The words shall be legibly and indelibly printed on a tag or sign constructed of corrosion-resistant waterproof material or shall be indelibly printed on the fixture. The letters of the words shall be not less than 0.5 inches (12.7 mm) in height and in colors in contrast to the background on which they are applied. The pictograph shown in Figure 1301.4 shall appear on the signage required by this section.
FIGURE 1301.4
Pictograph DO NOT DRINK

1301.5 Potable water supply system connections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where a potable water supply system is connected to a nonpotable water system, the potable water supply shall be protected against backflow in accordance with the applicable provisions of Section 608.

1301.6 Nonpotable water system connections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where a nonpotable water system is connected and supplies water to another nonpotable water system, the nonpotable water system that supplies water shall be protected against backflow in accordance with the applicable provisions of Section 608.

1301.7 Approved components and materials

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Piping, plumbing components, and materials used in the nonpotable water drainage and distribution systems shall be approved for the intended application and compatible with the water and any disinfection or treatment systems used.

1301.8 Insect and vermin control

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water systems shall be protected to prevent the entrance of insects and vermin into storage and piping systems. Screen materials shall be compatible with system material and shall not promote corrosion of system components.

1301.9 Freeze protection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water systems shall be protected from freezing in accordance with the applicable provisions of Chapter 3.

1301.10 Nonpotable water storage tanks

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable water storage tanks shall be approved for the intended application and comply with Sections 1301.10.1 through 1301.10.12.

1301.10.1 Sizing

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The holding capacity of storage tanks shall be sized for the intended use.

1301.10.2 Inlets

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tank inlets shall be designed to introduce water into the tank and avoid agitating the contents of the storage tank. The water supply to storage tanks shall be controlled by fill valves or other automatic supply valves designed to stop the flow of incoming water before the tank contents reach the overflow pipes.

1301.10.3 Outlets

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Outlets shall be located at least 4 inches (102 mm) above the bottom of the storage tank and shall not skim water from the surface.

1301.10.4 Materials and location

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be constructed of material compatible with treatment systems used to treat water. Above grade storage vessels shall be constructed using opaque, UV-resistant materials such as tinted plastic, lined metal, concrete or wood or painted to prevent algae growth. Above grade storage tanks shall be protected from direct sunlight unless their design specifically incorporates the use of the sunlight heat transfer. Wooden storage tanks shall be provided with a flexible liner. Storage tanks and their manholes shall not be located directly under soil or waste piping or sources of contamination.

1301.10.5 Foundation and supports

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be supported on a firm base capable of withstanding the storage tank’s weight when filled to capacity. Storage tanks shall be supported in accordance with the applicable provisions of the IBC.

1301.10.5.1 Ballast

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the soil can become saturated, an underground storage tank shall be ballasted, or otherwise secured, to prevent the effects of buoyancy. The combined weight of the tank and hold down ballast shall meet or exceed the buoyancy force of the tank. Where the installation requires a foundation, the foundation shall be flat and shall be designed to support the storage tank weight when full, consistent with the bearing capability of adjacent soil.

1301.10.5.2 Structural support

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where installed below grade, storage tank installations shall be designed to withstand earth and surface structural loads without damage.

1301.10.6 Overflow

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The storage tank shall be equipped with an overflow pipe having a diameter not less than that shown in Table 606.5.4. The overflow outlet shall discharge at a point not less than 6 inches (152 mm) above the roof or roof drain, floor or floor drain, or over an open water-supplied fixture. The overflow outlet shall terminate through a check valve. Overflow pipes shall not be directed on walkways. The overflow drain shall not be equipped with a shutoff valve. A minimum of one cleanout shall be provided on each overflow pipe in accordance with the applicable provisions of Section 708.

1301.10.7 Access

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
A minimum of one access opening shall be provided to allow inspection and cleaning of the tank interior. Access openings shall have an approved locking device or other approved method of securing access. Below grade storage tanks, located outside of the building, shall be provided with either a manhole not less than 24 inches (610 mm) square or a manhole with an inside diameter not less than 24 inches (610 mm). The design and installation of access openings shall prohibit surface water from entering the tank. Each manhole cover shall have an approved locking device or other approved method of securing access.

Exception: Storage tanks under 800 gallons (3028 L) in volume installed below grade shall not be required to be equipped with a manhole, but shall have an access opening not less than 8 inches (203 mm) in diameter to allow inspection and cleaning of the tank interior.

1301.10.8 Venting

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be vented. Vents shall not be connected to sanitary drainage system. Vents shall be at least equal in size to the internal diameter of the drainage inlet pipe or pipes connected to the tank. Where installed at grade, vents shall be protected from contamination by means of a U-bend installed with the opening directed downward. Vent outlets shall extend a minimum of 12 inches (304.8 mm) above grade, or as necessary to prevent surface water from entering the storage tank. Vent openings shall be protected against the entrance of vermin and insects. Vents serving gray water tanks shall terminate in accordance with the applicable provisions of Sections 903 and 1301.8.

1301.10.9 Drain

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where drains are provided they shall be located at the lowest point of the storage tank. The tank drain pipe shall discharge as required for overflow pipes and shall not be smaller in size than specified in Table 606.5.7. A minimum of one cleanout shall be provided on each drain pipe in accordance with Section 708.

1301.10.10 Labeling and signage

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Each nonpotable water storage tank shall be labeled with its rated capacity and the location of the upstream bypass valve. Underground and otherwise concealed storage tanks shall be labeled at all access points. The label shall read: “CAUTION: NONPOTABLE WATER – DO NOT DRINK.” Where an opening is provided that could allow the entry of personnel, the opening shall be marked with the words: “DANGER – CONFINED SPACE.” Markings shall be indelibly printed on a tag or sign constructed of corrosion-resistant waterproof material mounted on the tank or shall be indelibly printed on the tank. The letters of the words shall be not less than 0.5 inches (12.7 mm) in height and shall be of a color in contrast with the background on which they are applied.

1301.10.11 Storage tank tests

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be tested in accordance with the following:
  1. Storage tanks shall be filled with water to the overflow line prior to and during inspection. All seams and joints shall be left exposed and the tank shall remain watertight without leakage for a period of 24 hours.
  2. After 24 hours, supplemental water shall be introduced for a period of 15 minutes to verify proper drainage of the overflow system and verify that there are no leaks.
  3. Following a successful test of the overflow, the water level in the tank shall be reduced to a level that is at 2 inches (50.8 mm) below the makeup water offset point. The tank drain shall be observed for proper operation. The makeup water system shall be observed for proper operation, and successful automatic shutoff of the system at the refill threshold shall be verified. Water shall not be drained from the overflow at any time during the refill test.
  4. Air tests shall be permitted in lieu of water testing as recommended by the tank manufacturer or the tank standard.

1301.10.12 Structural strength

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall meet the applicable structural strength requirements of the IBC.

1301.11 Trenching requirements for nonpotable water system piping

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Underground nonpotable water system piping shall be horizontally separated from the building sewer and potable water piping by 5 feet (1524 mm) of undisturbed or compacted earth. Nonpotable water system piping shall not be located in, under, or above sewage systems cesspools, septic tanks, septic tank drainage fields, or seepage pits. Buried nonpotable system piping shall comply with the requirements of this code for the piping material installed.

Exceptions:
  1. The required separation distance shall not apply where the bottom of the nonpotable water pipe within 5 feet (1524 mm) of the sewer is equal to or greater than 12 inches (305 mm) above the top of the highest point of the sewer and the pipe materials conforms to Table 702.3.
  2. The required separation distance shall not apply where the bottom of the potable water service pipe within 5 feet (1524 mm) of the nonpotable water pipe is a minimum of 12 inches (305 mm) above the top of the highest point of the nonpotable water pipe and the pipe materials comply with the requirements of Table 605.4.
  3. Nonpotable water pipe is permitted to be located in the same trench with building sewer piping, provided that such sewer piping is constructed of materials that comply with the requirements of Table 702.2.
  4. The required separation distance shall not apply where a nonpotable water pipe crosses a sewer pipe, provided that the pipe is sleeved to at least 5 feet (1524 mm) horizontally from the sewer pipe centerline on both sides of such crossing with pipe materials that comply with Table 702.2.
  5. The required separation distance shall not apply where a potable water service pipe crosses a nonpotable water pipe provided that the potable water service pipe is sleeved for a distance of at least 5 feet (1524 mm) horizontally from the centerline of the nonpotable pipe on both sides of such crossing with pipe materials that comply with Table 702.2.

1301.12 Outdoor outlet access

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Sillcocks, hose bibs, wall hydrants, yard hydrants, and other outdoor outlets that are supplied by nonpotable water shall be located in a locked vault or shall be operable only by means of a removable key.

1301.13 Drainage and vent piping and fittings

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable drainage and vent pipe and fittings shall comply with the applicable material standards and installation requirements in accordance with provisions of Chapter 7.

1301.13.1 Labeling and marking

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Identification of nonpotable drainage and vent piping shall not be required.

1301.14 Pumping and control system

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Mechanical equipment, including pumps, valves, and filters, shall be accessible and removable in order to perform repair, maintenance, and cleaning. The minimum flow rate and flow pressure delivered by the pumping system shall be designed for the intended application in accordance with the applicable provisions of Section 604.

1301.15 Water-pressure reducing valve or regulator

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the water pressure supplied by the pumping system exceeds 80 psi (552 kPa) static, a pressure-reducing valve shall be installed to reduce the pressure in the nonpotable water distribution system piping to 80 psi (552 kPa) static or less. Pressure-reducing valves shall be specified and installed in accordance with the applicable provisions of Section 604.8.

1301.16 Distribution pipe

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping utilized in nonpotable water systems shall comply with Sections 1301.16.1 through 1301.16.4.

1301.16.1 Materials, joints and connections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping and fittings shall comply with the applicable material standards and installation requirements in accordance with applicable provisions of Chapter 6.

1301.16.2 Design

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping shall be designed and sized in accordance with the applicable provisions of Chapter 6.

1301.16.3 Labeling and marking

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping labeling and marking shall comply with Section 608.8.

1301.16.4 Backflow prevention

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Backflow preventers shall be installed in accordance with the applicable provisions of Section 608.

1301.17 Tests and inspections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Tests and inspections shall be performed in accordance with Sections 1301.17.1 through 1301.17.5.

1301.17.1 Drainage and vent pipe test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Drain, waste, and vent piping used for gray water and rainwater nonpotable water systems shall be tested in accordance with the applicable provisions of Section 312.

1301.17.2 Storage tank test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be tested in accordance with the Section 1301.10.11.

1301.17.3 Water supply system test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable distribution piping shall be tested in accordance with Section 312.5.

1301.17.4 Inspection and testing of backflow prevention assemblies

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The testing of backflow preventers and backwater valves shall be conducted in accordance with Section 312.10.

1301.17.5 Inspection of vermin and insect protection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Inlets and vent terminations shall be visually inspected to verify that each termination is installed in accordance with Section 1301.10.8.

1301.18 Operation and maintenance manuals

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Operations and maintenance materials for nonpotable water systems shall be provided as prescribed by the system component manufacturers and supplied to the owner to be kept in a readily accessible location.

Section 1302 On-Site Nonpotable Water Reuse Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.

1302.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The provisions of Section 1302 shall govern the construction, installation, alteration and repair of on-site nonpotable water reuse systems for the collection, storage, treatment and distribution of on-site sources of nonpotable water as permitted by the jurisdiction.

1302.2 Sources

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
On-site nonpotable water reuse systems shall collect waste discharge from only the following sources: bathtubs, showers, lavatories, clothes washers and laundry trays. Water from other approved nonpotable sources including swimming pool backwash operations, air conditioner condensate, rainwater, cooling tower blow-down water, foundation drain water, steam system condensate, fluid cooler discharge water, food steamer discharge water, combination oven discharge water, industrial process water and fire pump test water shall also be permitted to be collected for reuse by on-site nonpotable water reuse systems, as approved by the code official and as appropriate for the intended application.

1302.2.1 Prohibited Sources

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Waste water containing urine or fecal matter shall not be diverted to on-site nonpotable water reuse systems and shall discharge to the sanitary drainage system of the building or premises in accordance with Chapter 7. Reverse osmosis system reject water, water softener discharge water, kitchen sink waste water, dishwasher waste water and waste water discharged from wet-hood scrubbers shall not be collected for reuse in an on-site nonpotable water reuse system.

1302.3 Traps

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Traps serving fixtures and devices discharging waste water to on-site nonpotable water reuse systems shall comply with Section 1002.4.

1302.4 Collection Pipe

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
On-site nonpotable water reuse systems shall utilize drainage piping approved for use in plumbing drainage systems to collect and convey untreated water for reuse. Vent piping approved for use in plumbing venting systems shall be utilized for vents in the gray water system. Collection and vent piping materials shall comply with Section 702.

1302.4.1 Installation

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Collection piping conveying untreated water for reuse shall be installed in accordance with Section 704.

1302.4.2 Joints

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Collection piping conveying untreated water for reuse shall utilize joints approved for use with the distribution piping and appropriate for the intended applications as specified in Section 705.

1302.4.3 Size

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Collection piping conveying untreated water for reuse shall be sized in accordance with drainage sizing requirements specified in Section 710.

1302.4.4 Labeling and Marking

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Additional marking of collection piping conveying untreated water for reuse shall not be required beyond that required for sanitary drainage, waste and vent piping by Chapter 7.

1302.5 Filtration

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Untreated water collected for reuse shall be filtered as required for the intended end use. Filters shall be accessible for inspection and maintenance. Filters shall utilize a pressure gauge or other approved method to provide indication when a filter requires servicing or replacement. Filters shall be installed with shutoff valves immediately upstream and downstream to allow for isolation during maintenance.

1302.6 Disinfection and Treatment

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the intended application for nonpotable water collected on site for reuse requires disinfection or other treatment or both, it shall be disinfected as needed to ensure that the required water quality is delivered at the point of use. Nonpotable water collected on site containing untreated gray water shall be retained in collection reservoirs for a maximum of 24 hours.

1302.6.1 Gray Water Used for Fixture Flushing

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Gray water used for flushing water closets and urinals shall be disinfected and treated by an on-site water reuse treatment system complying with NSF 350.

1302.7 Storage Tanks

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks utilized in on-site nonpotable water reuse systems shall comply with Sections 1301.9 and 1302.7.1 through 1302.7.3.

1302.7.1 Location

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be located with a minimum horizontal distance between various elements as indicated in Table 1302.7.1.

TABLE 1302.7.1 LOCATION OF NONPOTABLE WATER REUSE STORAGE TANKS

ELEMENT MINIMUM HORIZONTAL DISTANCE FROM STORAGE TANK (feet)
Critical root zone (CRZ) of protected trees 2
Lot line adjoining private lots 5
Seepage pits 5
Septic tanks 5
Water wells 50
Streams and lakes 50
Water service 5
Public water main 10

For SI: 1 foot = 304.8 mm.

1302.7.2 Design and Construction

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be designed and constructed in accordance with Chapters 16 through 22 of the International Building Code and in accordance with the following standards, as appropriate for the material of the storage tank: AWWA D100, AWWA D115, AWWA D120, UL 58, UL 1746, UL 1316, UL 142, API 12F or API 12D.

1302.7.3 Outlets

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Outlets shall be located not less than 4 inches (102 mm) above the bottom of the storage tank and shall not skim water from the surface.

1302.8 Valves

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Valves shall be supplied on on-site nonpotable water reuse systems in accordance with Sections 1302.8.1 and 1302.8.2.

1302.8.1 Bypass Valve

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
One three-way diverter valve listed and labeled to NSF 50 or other approved device shall be installed on collection piping upstream of each storage tank, or drainfield, as applicable, to divert untreated on-site reuse sources to the sanitary sewer to allow servicing and inspection of the system. Bypass valves shall be installed downstream of fixture traps and vent connections. Bypass valves shall be marked to indicate the direction of flow, connection and storage tank or drainfield connection. Bypass valves shall be installed in accessible locations. Two shutoff valves shall not be installed to serve as a bypass valve.

1302.8.2 Backwater Valve

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
One or more backwater valves shall be installed on each overflow and tank drain pipe. Backwater valves shall be in accordance with Section 715.

1302.9 Pumping and Control System

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Mechanical equipment including pumps, valves and filters shall be easily accessible and removable in order to perform repair, maintenance and cleaning. The minimum flow rate and flow pressure delivered by the pumping system shall be appropriate for the application and in accordance with Section 604.

1302.10 Water Pressure-Reducing Valve or Regulator

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the water pressure supplied by the pumping system exceeds 80 psi (552 kPa) static, a pressure-reducing valve shall be installed to reduce the pressure in the nonpotable water distribution system piping to 80 psi (552 kPa) static or less. Pressure-reducing valves shall be specified and installed in accordance with Section 604.8.

1302.11 Distribution Pipe

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping utilized in on-site nonpotable water reuse systems shall comply with Sections 1302.11.1 through 1302.11.3.

Exception: Irrigation piping located outside of the building and downstream of a backflow preventer.

1302.11.1 Materials, Joints and Connections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping shall conform to the standards and requirements specified in Section 605.

1302.11.2 Design

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
On-site nonpotable water reuse distribution piping systems shall be designed and sized in accordance with Section 604 for the intended application.

1302.11.3 Marking

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
On-site nonpotable water distribution piping labeling and marking shall comply with Section 608.8.

1302.12 Tests and Inspections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Tests and inspections shall be performed in accordance with Sections 1302.12.1 through 1302.12.6.

1302.12.1 Collection Pipe and Vent Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Drain, waste and vent piping used for on-site water reuse systems shall be tested in accordance with Section 312.

1302.12.2 Storage Tank Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be tested in accordance with Section 1301.9.11.

1302.12.3 Water Supply System Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The testing of makeup water supply piping and distribution piping shall be conducted in accordance with Section 312.5.

1302.12.4 Inspection and Testing of Backflow Prevention Assemblies

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The testing of backflow preventers and backwater valves shall be conducted in accordance with Section 312.10.

1302.12.5 Inspection of Vermin and Insect Protection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Inlets and vents to the system shall be inspected to verify that each is protected to prevent the entrance of insects and vermin into the storage tank and piping systems in accordance with Section 1301.7.

1302.12.6 Water Quality Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The quality of the water for the intended application shall be verified at the point of use in accordance with the requirements of the jurisdiction.

1302.13 Operation and Maintenance Manuals

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Operation and maintenance materials shall be supplied with nonpotable on-site water reuse systems in accordance with Sections 1302.13.1 through 1302.13.4.

1302.13.1 Manual

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
A detailed operations and maintenance manual shall be supplied in hardcopy form with all systems.

1302.13.2 Schematics

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The manual shall include a detailed system schematic, and the locations and a list of all system components, including manufacturer and model number.

1302.13.3 Maintenance Procedures

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The manual shall provide a schedule and procedures for all system components requiring periodic maintenance. Consumable parts, including filters, shall be noted along with part numbers.

1302.13.4 Operations Procedures

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The manual shall include system startup and shutdown procedures. The manual shall include detailed operating procedures for the system.

Section 1302 Gray Water Nonpotable Water Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.

1302.1 Gray water nonpotable water systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
This code is applicable to the plumbing fixtures, piping or piping systems, storage tanks, drains, appurtenances, and appliances that are part of the distribution system for gray water within buildings and to storage tanks and associated piping that are part of the distribution system for gray water outside of buildings. This code does not regulate equipment used for, or the methods of, processing, filtering, or treating gray water, that may be regulated by the Virginia Department of Health or the Virginia Department of Environmental Quality.

1302.1.1 Separate systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Gray water nonpotable water systems, unless approved otherwise under the permit from the Virginia Department of Health, shall be separate from the potable water system of a building with no cross connections between the two systems except as permitted by the Virginia Department of Health.

1302.2 Water quality

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Each application of gray water reuse shall meet the minimum water quality requirements set forth in Sections 1302.2.1 through 1302.2.4 unless otherwise superseded by other state agencies.

1302.2.1 Disinfection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the intended use or reuse application for nonpotable water requires disinfection or other treatment or both, it shall be disinfected as needed to ensure that the required water quality is delivered at the point of use or reuse.

1302.2.2 Residual disinfectants

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where chlorine is used for disinfection, the nonpotable water shall contain not more than 4 parts per million (4 mg/L) of free chlorine, combined chlorine, or total chlorine. Where ozone is used for disinfection, the nonpotable water shall not exceed 0.1 parts per million (by volume) of ozone at the point of use.

1302.2.3 Filtration

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Water collected for reuse shall be filtered as required for the intended end use. Filters shall be accessible for inspection and maintenance. Filters shall utilize a pressure gauge or other approved method to indicate when a filter requires servicing or replacement. Shutoff valves installed immediately upstream and downstream of the filter shall be included to allow for isolation during maintenance.

1302.2.4 Filtration required

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Gray water utilized for water closet and urinal flushing applications shall be filtered by a 100 micron or finer filter.

1302.3 Storage tanks

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks utilized in gray water nonpotable water systems shall comply with Section 1301.10.

1302.4 Retention time limits

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Untreated gray water shall be retained in storage tanks for a maximum of 24 hours.

1302.5 Tank Location

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be located with a minimum horizontal distance between various elements as indicated in Table 1302.5.1.

TABLE 1302.5.1
LOCATION OF NONPOTABLE GRAY WATER REUSE STORAGE TANKS


ELEMENT MINIMUM
HORIZONTAL
DISTANCE FROM
STORAGE TANK (feet)
Lot line adjoining
private lots
5
Sewage systems 5
Septic tanks 5
Water wells 50
Streams and lakes 50
Water service 5
Public water main 10

1302.6 Valves

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Valves shall be supplied on gray water nonpotable water drainage systems in accordance with Sections 1302.6.1 and 1302.6.2.

1302.6.1 Bypass valve

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
One three-way diverter valve certified to NSF 50 or other approved device shall be installed on collection piping upstream of each storage tank, or drainfield, as applicable, to divert untreated gray water to the sanitary sewer to allow servicing and inspection of the system. Bypass valves shall be installed downstream of fixture traps and vent connections. Bypass valves shall be labeled to indicate the direction of flow, connection, and storage tank or drainfield connection. Bypass valves shall be provided with access for operation and maintenance. Two shutoff valves shall not be installed to serve as a bypass valve.

1302.6.2 Backwater valve

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Backwater valves shall be installed on each overflow and tank drain pipe to prevent unwanted water from draining back into the storage tank. If the overflow and drain piping arrangement is installed to physically not allow water to drain back into the tank, such as in the form of an air gap, backwater valves shall not be required. Backwater valves shall be constructed and installed in accordance with Section 715.

Section 1303 Nonpotable Rainwater Collection and Distribution Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.

1303.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The provisions of Section 1303 shall govern the construction, installation, alteration and repair of rainwater collection and conveyance systems for the collection, storage, treatment and distribution of rainwater for nonpotable applications, as permitted by the jurisdiction.

1303.2 Collection Surface

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Rainwater shall be collected only from above-ground impervious roofing surfaces constructed from approved materials. Collection of water from vehicular parking or pedestrian surfaces shall be prohibited except where the water is used exclusively for landscape irrigation. Overflow and bleed-off pipes from roof-mounted appliances including, but not limited to, evaporative coolers, water heaters, and solar water heaters shall not discharge onto rainwater collection surfaces.

1303.3 Debris Excluders

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Downspouts and leaders shall be connected to a roof washer and shall be equipped with a debris excluder or equivalent device to prevent the contamination of collected rainwater with leaves, sticks, pine needles and similar material. Debris excluders and equivalent devices shall be self-cleaning.

1303.4 Roof Washer

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
A sufficient amount of rainwater shall be diverted at the beginning of each rain event, and not allowed to enter the storage tank, to wash accumulated debris from the collection surface. The amount of rainfall to be diverted shall be field adjustable as necessary to minimize storage tank water contamination. The roof washer shall not rely on manually operated valves or devices, and shall operate automatically. Diverted rainwater shall not be drained to the roof surface, and shall be discharged in a manner consistent with the storm water runoff requirements of the jurisdiction. Roof washers shall be accessible for maintenance and service.

1303.5 Roof Gutters and Downspouts

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Gutters and downspouts shall be constructed of materials that are compatible with the collection surface and the rainwater quality for the desired end use. Joints shall be water tight.

1303.5.1 Slope

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Roof gutters, leaders and rainwater collection piping shall slope continuously toward collection inlets. Gutters and downspouts shall have a slope of not less than 1/8 inch per foot (10.4 mm/m) along their entire length, and shall not permit the collection or pooling of water at any point.

Exception: Siphonic drainage systems installed in accordance with the manufacturer’s instructions shall not be required to have a slope.

1303.5.2 Size

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Gutters and downspouts shall be installed and sized in accordance with Section 1106.6 and local rainfall rates.

1303.5.3 Cleanouts

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Cleanouts shall be provided in the water conveyance system to allow access to all filters, flushes, pipes and downspouts.

1303.6 Drainage

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Water drained from the roof washer or debris excluder shall not be drained to the sanitary sewer. Such water shall be diverted from the storage tank and discharge in a location that will not cause erosion or damage to property in accordance with the International Building Code. Roof washers and debris excluders shall be provided with an automatic means of self-draining between rain events, and shall not drain onto roof surfaces.

1303.7 Collection Pipe

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Rainwater collection and conveyance systems shall utilize drainage piping approved for use within plumbing drainage systems to collect and convey captured rainwater. Vent piping approved for use within plumbing venting systems shall be utilized for vents within the rainwater system. Collection and vent piping materials shall comply with Section 702.

1303.7.1 Installation

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Collection piping conveying captured rainwater shall be installed in accordance with Section 704.

1303.7.2 Joints

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Collection piping conveying captured rainwater shall utilize joints approved for use with the distribution piping and appropriate for the intended applications as specified in Section 705.

1303.7.3 Size

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Collection piping conveying captured rainwater shall be sized in accordance with drainage sizing requirements specified in Section 710.

1303.7.4 Marking

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Additional marking of collection piping conveying captured rainwater for reuse shall not be required beyond that required for sanitary drainage, waste and vent piping by Chapter 7.

1303.8 Filtration

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Collected rainwater shall be filtered as required for the intended end use. Filters shall be accessible for inspection and maintenance. Filters shall utilize a pressure gauge or other approved method to provide indication when a filter requires servicing or replacement. Filters shall be installed with shutoff valves installed immediately upstream and downstream to allow for isolation during maintenance.

1303.9 Disinfection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the intended application for rainwater requires disinfection or other treatment or both, it shall be disinfected as needed to ensure that the required water quality is delivered at the point of use. Where chlorine is used for disinfection or treatment, water shall be tested for residual chlorine in accordance with ASTM D 1253. The levels of residual chlorine shall not exceed that allowed for the intended use in accordance with the requirements of the jurisdiction.

1303.10 Storage Tanks

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks utilized in nonpotable rainwater collection and conveyance systems shall comply with Sections 1301.9 and 1303.10.1 through 1303.10.3.

1303.10.1 Location

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be located with a minimum horizontal distance between various elements as indicated in Table 1303.10.1.

TABLE 1303.10.1 LOCATION OF RAINWATER STORAGE TANKS

ELEMENT MINIMUM HORIZONTAL DISTANCE FROM STORAGE TANK (feet)
Critical root zone (CRZ) of protected trees 2
Lot line adjoining private lots 5
Seepage pits 5
Septic tanks 5

For SI: 1 foot = 304.8 mm.

1303.10.2 Inlets

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tank inlets shall be designed to introduce collected rainwater into the tank with minimum turbulence, and shall be located and designed to avoid agitating the contents of the storage tank.

1303.10.3 Outlets

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Outlets shall be located at least 4 inches (102 mm) above the bottom of the storage tank and shall not skim water from the surface.

1303.11 Valves

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Valves shall be supplied on rainwater collection and conveyance systems in accordance with Section 1303.11.1.

1303.11.1 Backwater Valve

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Backwater valves shall be installed on each overflow and tank drain pipe. Backwater valves shall be in accordance with Section 715.

1303.12 Pumping and Control System

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Mechanical equipment including pumps, valves and filters shall be easily accessible and removable in order to perform repair, maintenance and cleaning. The minimum flow rate and flow pressure delivered by the pumping system shall be appropriate for the application and in accordance with Section 604.

1303.13 Water Pressure-Reducing Valve or Regulator

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the water pressure supplied by the pumping system exceeds 80 psi (552 kPa) static, a pressure-reducing valve shall be installed to reduce the pressure in the rainwater distribution system piping to 80 psi (552 kPa) static or less. Pressure-reducing valves shall be specified and installed in accordance with Section 604.8.

1303.14 Distribution Pipe

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping utilized in rainwater collection and conveyance systems shall comply with Sections 1303.14.1 through 1303.14.3.

Exception: Irrigation piping located outside of the building and downstream of a backflow preventer.

1303.14.1 Materials, Joints and Connections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping shall conform to the standards and requirements specified in Section 605 for nonpotable water.

1303.14.2 Design

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping systems shall be designed and sized in accordance with Section 604 for the intended application.

1303.14.3 Marking

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable rainwater distribution piping labeling and marking shall comply with Section 608.8.

1303.15 Tests and Inspections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Tests and inspections shall be performed in accordance with Sections 1303.15.1 through 1303.15.8.

1303.15.1 Roof Gutter Inspection and Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Roof gutters shall be inspected to verify that the installation and slope is in accordance with Section 1303.5.1. Gutters shall be tested by pouring not less than 1 gallon (3.8 l) of water into the end of the gutter opposite the collection point. The gutter being tested shall not leak and shall not retain standing water.

1303.15.2 Roofwasher Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Roofwashers shall be tested by introducing water into the gutters. Proper diversion of the first quantity of water in accordance with the requirements of Section 1303.4 shall be verified.

1303.15.3 Collection Pipe and Vent Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Drain, waste and vent piping used for rainwater collection and conveyance systems shall be tested in accordance with Section 312.

1303.15.4 Storage Tank Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be tested in accordance with Section 1301.9.11.

1303.15.5 Water Supply System Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The testing of makeup water supply piping and distribution piping shall be conducted in accordance with Section 312.5.

1303.15.6 Inspection and Testing of Backflow Prevention Assemblies

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The testing of backflow preventers and backwater valves shall be conducted in accordance with Section 312.10.

1303.15.7 Inspection of Vermin and Insect Protection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Inlets and vents to the system shall be inspected to verify that each is protected to prevent the entrance of insects and vermin into the storage tank and piping systems in accordance with Section 1301.7.

1303.15.8 Water Quality Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The quality of the water for the intended application shall be verified at the point of use in accordance with the requirements of the jurisdiction. Except where site conditions as specified in ASTM E 2727 affect the rainwater, collected rainwater shall be considered to have the parameters indicated in Table 1303.15.8.

TABLE 1303.15.8 RAINWATER QUALITY

PARAMETER VALUE
pH 6.0-7.0
BOD Not greater than 10 mg/L
NTU Not greater than 2
Fecal coliform No detectable fecal coli in 100 mL
Sodium No detectable sodium in 100 mL
Chlorine No detectable chlorine in 100 mL
Enteroviruses No detectable enteroviruses in 100 mL

1303.16 Operation and Maintenance Manuals

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Operation and maintenance manuals shall be supplied with rainwater collection and conveyance systems in accordance with Sections 1303.16.1 through 1303.16.4.

1303.16.1 Manual

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
A detailed operations and maintenance manual shall be supplied in hardcopy form with all systems.

1303.16.2 Schematics

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The manual shall include a detailed system schematic, and locations and a list of all system components, including manufacturer and model number.

1303.16.3 Maintenance Procedures

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The manual shall provide a maintenance schedule and procedures for all system components requiring periodic maintenance. Consumable parts, including filters, shall be noted along with part numbers.

1303.16.4 Operations Procedures

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The manual shall include system startup and shutdown procedures, as well as detailed operating procedures.

Section 1303 Rainwater Nonpotable Water Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.

1303.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The provisions of this section shall govern the design, construction, installation, alteration, and repair of rainwater nonpotable water systems for the collection, storage, treatment, and distribution of rainwater for nonpotable applications.

1303.2 Water quality

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Each application of rainwater reuse shall meet the minimum water quality requirements set forth in Sections 1303.2.1 through 1303.2.4 unless otherwise superseded by other state agencies.

1303.2.1 Disinfection

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the intended use or reuse application for nonpotable water requires disinfection or other treatment or both, it shall be disinfected as needed to ensure that the required water quality is delivered at the point of use or reuse.

1303.2.2 Residual disinfectants

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where chlorine is used for disinfection, the nonpotable water shall contain not more than 4 parts per million (4 mg/L) of free chlorine, combined chlorine, or total chlorine. Where ozone is used for disinfection, the nonpotable water shall not exceed 0.1 parts per million (by volume) of ozone at the point of use.

1303.2.3 Filtration

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Water collected for reuse shall be filtered as required for the intended end use. Filters shall be accessible for inspection and maintenance. Filters shall utilize a pressure gauge or other approved method to indicate when a filter requires servicing or replacement. Shutoff valves installed immediately upstream and downstream of the filter shall be included to allow for isolation during maintenance.

1303.2.4 Filtration required

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Rainwater utilized for water closet and urinal flushing applications shall be filtered by a 100 micron or finer filter.

1303.3 Collection surface

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Rainwater shall be collected only from aboveground impervious roofing surfaces constructed from approved materials. Overflow or discharge piping from appliances or equipment, or both, including but not limited to evaporative coolers, water heaters, and solar water heaters shall not discharge onto rainwater collection surfaces.

1303.4 Collection surface diversion

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
At a minimum, the first 0.04 inches (1.016 mm) of each rain event of 25 gallons (94.6 L) per 1000 square feet (92.9 m2) shall be diverted from the storage tank by automatic means and not require the operation of manually operated valves or devices. Diverted water shall not drain onto other collection surfaces that are discharging to the rainwater system or to the sanitary sewer. Such water shall be diverted from the storage tank and discharged in an approved location.

1303.5 Pre-tank filtration

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Downspouts, conductors, and leaders shall be connected to a pretank filtration device. The filtration device shall not permit materials larger than 0.015 inches (0.4 mm).

1303.6 Roof gutters and downspouts

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Gutters and downspouts shall be constructed of materials that are compatible with the collection surface and the rainwater quality for the desired end use. Joints shall be made watertight.

1303.6.1 Slope

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Roof gutters, leaders, and rainwater collection piping shall slope continuously toward collection inlets. Gutters and downspouts shall have a slope of not less than 1 unit in 96 units along their entire length and shall not permit the collection or pooling of water at any point.

Exception: Siphonic roof drainage systems installed in accordance with Chapter 11 shall not be required to have slope.

1303.6.2 Size

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Gutters and downspouts shall be installed and sized in accordance with Section 1106.6 and local rainfall rates.

1303.6.3 Cleanouts

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Cleanouts or other approved openings shall be provided to permit access to all filters, flushes, pipes, and downspouts.

1303.7 Storage tanks

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks utilized in rainwater nonpotable water systems shall comply with Section 1301.10.

1303.8 Location

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Storage tanks shall be located with a minimum horizontal distance between various elements as indicated in Table 1303.8.1.

TABLE 1303.8.1
LOCATION OF RAINWATER STORAGE TANKS


ELEMENT MINIMUM
HORIZONTAL
DISTANCE FROM
STORAGE TANK (feet)
Lot line adjoining
private lots
5
Sewage systems 5
Septic tanks 5

1303.9 Valves

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Valves shall be installed in collection and conveyance drainage piping of rainwater nonpotable water systems in accordance with Sections 1303.9.1 and 1303.9.2.

1303.9.1 Influent diversion

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
A means shall be provided to divert storage tank influent to allow maintenance and repair of the storage tank system.

1303.9.2 Backwater valve

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Backwater valves shall be installed on each overflow and tank drain pipe to prevent unwanted water from draining back into the storage tank. If the overflow and drain piping arrangement is installed to physically not allow water to drain back into the tank, such as in the form of an air gap, backwater valves shall not be required. Backwater valves shall be constructed and installed in accordance with Section 715.

1303.10 Tests and inspections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Tests and inspections shall be performed in accordance with Sections 1303.10.1 through 1303.10.2.

1303.10.1 Roof gutter inspection and test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Roof gutters shall be inspected to verify that the installation and slope is in accordance with Section 1303.6.1. Gutters shall be tested by pouring a minimum of one gallon of water into the end of the gutter opposite the collection point. The gutter being tested shall not leak and shall not retain standing water.

1303.10.2 Collection surface diversion test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
A collection surface diversion test shall be performed by introducing water into the gutters or onto the collection surface area. Diversion of the first quantity of water in accordance with the requirements of Section 1303.4 shall be verified.

1304.1 General

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The provisions of this section shall govern the construction, installation, alteration and repair of systems supplying nonpotable reclaimed water.
Reclaimed water, water reclamation systems, reclaimed water distribution systems and allowable nonpotable reuses of reclaimed water are as defined or specified in and governed by the Virginia Water Reclamation and Reuse Regulation (9VAC25- 740). Permits from the Virginia State Water Control Board are required for such systems and reuses. The provisions of Section 1304 shall govern the design, construction, installation, alterations, and repair of plumbing fixtures, piping or piping systems, storage tanks, drains, appurtenances and appliances that are part of the distribution system for reclaimed water within buildings and to storage tanks for reclaimed water as defined in the Virginia Water Reclamation and Reuse Regulation (9VAC25-740) and associated piping outside of buildings that deliver reclaimed water into buildings. Where conflicts occur between this code and the Virginia Water Reclamation and Reuse Regulation (9VAC25-740), the provisions of the Virginia Water Reclamation and Reuse Regulation (9VAC25-740) shall apply unless determined otherwise by the Virginia Department of Environmental Quality and DHCD through a memorandum of agreement.

1304.2 Water Pressure-Reducing Valve or Regulator

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Where the reclaimed water pressure supplied to the building exceeds 80 psi (552 kPa) static, a pressure-reducing valve shall be installed to reduce the pressure in the reclaimed water distribution system piping to 80 psi (552 kPa) static or less. Pressure-reducing valves shall be specified and installed in accordance with Section 604.8.

1304.2 Design of reclaimed water systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The design of reclaimed water systems shall conform to applicable requirements of Section 1301.

Exception: The design of reclaimed water systems shall conform to applicable requirements of the Virginia Water Reclamation and Reuse Regulation (9VAC25-740) for the following:
  1. Identification, labeling, and posting of signage for reclaimed water systems in lieu of signage requirements described in Section 1301.4.
  2. Sizing of system storage as defined in the Virginia Water Reclamation and Reuse Regulation (9VAC25-740), in addition to storage sizing requirements described in Section 1301.10.1.
  3. Signage and labeling for reclaimed water storage in addition to labeling and signage requirements described in Section 1301.10.10.
  4. Minimum separation distances and configurations for in-ground reclaimed water distribution piping in lieu of trenching requirements for nonpotable water systems described in Section 1301.11.

1304.3 Reclaimed Water Systems

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The design of the reclaimed water systems shall conform to ASTM E 2635 and accepted engineering practice.

1304.3.1 Distribution Pipe

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping shall comply with Sections 1304.3.1.1 through 1304.3.1.3.

Exception: Irrigation piping located outside of the building and downstream of a backflow preventer.

1304.3.1.1 Materials, Joints and Connections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping conveying reclaimed water shall conform to standards and requirements specified in Section 605 for nonpotable water.

1304.3.1.2 Design

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Distribution piping systems shall be designed and sized in accordance with Section 604 for the intended application.

1304.3.1.3 Labeling and Marking

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Nonpotable rainwater distribution piping labeling and marking shall comply with Section 608.8.

1304.4 Tests and Inspections

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
Tests and inspections shall be performed in accordance with Sections 1304.4.1 and 1304.4.2.

1304.4.1 Water Supply System Test

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The testing of makeup water supply piping and reclaimed water distribution piping shall be conducted in accordance with Section 312.5.

1304.4.2 Inspection and Testing of Backflow Prevention Assemblies

AMENDMENT
This section has been amended at the state or city level. Amendments are shown in green text.
The testing of backflow preventers shall be conducted in accordance with Section 312.10.
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