Part I — Drainage Systems
- No galvanized wrought-iron or galvanized steel pipe shall be used underground and shall be kept not less than 6 inches (152 mm) aboveground.
- ABS and PVC DWV piping installations shall be installed in accordance with applicable standards referenced in Table 701.2 and Chapter 14 "Firestop Protection." Except for individual single-family dwelling units, materials exposed within ducts or plenums shall have a flame-spread index of not more than 25 and a smoke-developed index of not more than 50, where tested in accordance with ASTM E84 or UL 723. These tests shall comply with all requirements of the standards to include the sample size, both for width and length. Plastic pipe shall not be tested filled with water.
- No vitrified clay pipe or fittings shall be used aboveground or where pressurized by a pump or ejector. They shall be kept not less than 12 inches (305 mm) belowground.
- Copper or copper alloy tube for drainage and vent piping shall have a weight of not less than that of copper or copper alloy drainage tube type DWV.
- Stainless steel 304 pipe and fittings shall not be installed underground and shall be kept not less than 6 inches (152 mm) aboveground.
- Cast-iron soil pipe and fittings and the stainless steel couplings used to join these products shall be listed and tested in accordance with standards referenced in Table 701.2. Such pipe and fittings shall be marked with the country of origin, manufacturer's name or registered trademark as defined in the product standards, the third party certifier's mark, and the class of the pipe or fitting.
|MATERIAL||UNDERGROUND DRAIN, WASTE, VENT PIPE AND FITTINGS||ABOVEGROUND DRAIN, WASTE, VENT PIPE AND FITTINGS||BUILDING SEWER PIPE AND FITTINGS||REFERENCED STANDARD(S) PIPE||REFERENCED STANDARD(S) FITTINGS|
|ABS (Schedule 40)||X||X||X||ASTM D2661,
|Co-Extruded ABS (Schedule 40)||X||X||X||ASTM F628||ASTM D2661,
|Co-Extruded Composite (Schedule 40)||X||X||X||ASTM F1488||ASTM D2661,
|Co-Extruded PVC (Schedule 40)||X||X||X||ASTM F891,
|Copper and Copper Alloys (Type DWV)||X||X||X||ASTM B43,
|ASME B 16.23,
ASME B 16.29
|Galvanized Malleable Iron||—||X||—||—||ASME B 16.3|
|Galvanized Steel||—||X||—||ASTM A53||—|
|PVC (Schedule 40)||X||X||X||ASTM D1785,
|PVC (Sewer and Drain)||—||—||X||ASTM D2729||ASTM D2729|
|PVC PSM||—||—||X||ASTM D3034||ASTM D3034|
|Stainless Steel 304||—||X||—||ASME A112.3.1||ASME A112.3.1|
|Stainless Steel 316L||X||X||X||ASME A112.3.1||ASME A112.3.1|
|Vitrified Clay (Extra strength)||—||—||X||ASTM C700||ASTM C700|
* For building sewer applications.
- For safe pans — not less than 4 pounds per square foot (lb/ft2) (19 kg/m2) or 1/16 of an inch (1.6 mm) thick.
- For flashings or vent terminals — not less than 3 lb/ft2 (15 kg/m2) or 0.0472 of an inch (1.2 mm) thick.
- Lead bends and lead traps shall be not less than 1/8 of an inch (3.2 mm) in wall thickness.
|MINIMUM WEIGHT EACH|
For SI units: 1 inch = 25 mm, 1 pound = 0.453 kg, 1 ounce = 0.02834 kg
|MINIMUM WEIGHT EACH||PIPE SIZE
|MINIMUM WEIGHT EACH|
For SI units: 1 inch = 25 mm, 1 pound = 0.453 kg, 1 ounce = 0.02834 kg
|PLUMBING APPLIANCES, APPURTENANCES, OR FIXTURES||MINIMUM SIZE TRAP AND TRAP ARM7
|Bathtub or Combination Bath/Shower||11/2||2.0||2.0||—|
|Clothes Washer, domestic, standpipe5||2||3.0||3.0||3.0|
|Dental Unit, cuspidor||11/4||—||1.0||1.0|
|Dishwasher, domestic, with independent drain2||11/2||2.0||2.0||2.0|
|Drinking Fountain or Water Cooler||11/4||0.5||0.5||1.0|
|Food Waste Disposer, commercial||2||—||3.0||3.0|
|Floor Drain, emergency||2||—||0.0||0.0|
|Floor Drain (for additional sizes see Section 702.0)||2||2.0||2.0||2.0|
|Shower, single-head trap||2||2.0||2.0||2.0|
|Multi-head, each additional||2||1.0||1.0||1.0|
|Lavatories in sets||11/2||2.0||2.0||2.0|
|Mobile Home, trap||3||12.0||—||—|
|Receptor, indirect waste1,3||11/2||See footnote1,3|
|Receptor, indirect waste1,4||2||See footnote1,4|
|Receptor, indirect waste1||3||See footnote1|
|Commercial with food waste2||11/2||—||3.0||3.0|
|Kitchen, domestic2 (with or without food waste disposer, dishwasher, or both)||11/2||2.0||2.0||—|
|Laundry2(with or without discharge from a clothes washer)||11/2||2.0||2.0||2.0|
|Service or Mop Basin||2||—||3.0||3.0|
|Service or Mop Basin||3||—||3.0||3.0|
|Service, flushing rim||3||—||6.0||6.0|
|Wash, each set of faucets||—||—||2.0||2.0|
|Urinal, integral trap 1.0 GPF2||2||2.0||2.0||5.0|
|Urinal, integral trap greater than 1.0 GPF||2||2.0||2.0||6.0|
|Urinal, exposed trap2||11/2||2.0||2.0||5.0|
|Water Closet, 1.6 GPF Gravity Tank6||3||3.0||4.0||6.0|
|Water Closet, 1.6 GPF Flushometer Tank6||3||3.0||4.0||6.0|
|Water Closet, 1.6 GPF Flushometer Valve6||3||3.0||4.0||6.0|
|Water Closet, greater than 1.6 GPF Gravity Tank6||3||4.0||6.0||8.0|
|Water Closet, greater than 1.6 GPF Flushometer Valve6||3||4.0||6.0||8.0|
For SI units: 1 inch = 25 mm
2 Provide a 2 inch (50 mm) minimum drain.
3 For refrigerators, coffee urns, water stations, and similar low demands.
4 For commercial sinks, dishwashers, and similar moderate or heavy demands.
5 Buildings having a clothes-washing area with clothes washers in a battery of three or more clothes washers shall be rated at 6 fixture units each for purposes of sizing common horizontal and vertical drainage piping.
7 Trap sizes shall not be increased to the point where the fixture discharge is capable of being inadequate to maintain their self-scouring properties.
8 Assembly [Public Use (see Table 422.1)].
|SIZE OF TRAP AND TRAP ARM
|DRAINAGE FIXTURE UNIT VALUES (DFU)|
For SI Units: 1 inch = 25 mm
* Exception: On self-service laundries.
DISCHARGE CAPACITY IN GALLONS PER MINUTE FOR INTERMITTENT FLOW ONLY*
|up to 71/2||Equals 1 Fixture Unit|
|Greater than 71/2 to 15||Equals 2 Fixture Units|
|Greater than 15 to 30||Equals 4 Fixture Units|
|Greater than 30 to 50||Equals 6 Fixture Units|
For SI units: 1 gallon per minute = 0.06 L/s
* Discharge capacity exceeding 50 gallons per minute (3.15 L/s) shall be determined by the Authority Having Jurisdiction.
|SIZE OF PIPE (inches)||11/4||11/2||2||3||4||5||6||8||10||12|
|Horizontal and Vertical6|
|Maximum Lengths, (feet)||45||60||120||212||300||390||510||750|
For SI units: 1 inch = 25 mm, 1 foot = 304.8 mm
1 Excluding trap arm.
2 Except for sinks, urinals, and dishwashers — exceeding 1 fixture unit.
6 The diameter of an individual vent shall be not less than 11/4 inches (32 mm) nor less than one-half the diameter of the drain to which it is connected. Fixture unit load values for drainage and vent piping shall be computed from Table 702.1 and Table 702.2(2). Not to exceed one-third of the total permitted length of a vent shall be permitted to be installed in a horizontal position. Where vents are increased one pipe size for their entire length, the maximum length limitations specified in this table do not apply. This table is in accordance with the requirements of Section 901.3.
A mechanical joint shielded coupling type for hubless cast-iron pipe and fittings shall have a metallic shield that complies with ASTM A1056, ASTM C1277, ASTM C1540, or CISPI 310. The elastomeric gasket shall comply with ASTM C564. Hubless cast-iron pipe and fittings shall be clean and free of dirt, mud, sand, and foreign materials. Cut pipe shall be free from sharp edges. Gasket shall be placed on the end of the pipe or fitting and the stainless steel shield and clamp assembly on the end of the other pipe or fitting. Pipe or fittings shall be seated against the center stop inside the elastomeric sleeve. Slide the stainless steel shield and clamp assembly into a position centered over the gasket and tighten. Bands shall be tightened using an approved calibrated torque wrench specifically set by the manufacturer of the couplings.
|SIZE OF PIPE
|SIZE OF CLEANOUT
|4 & larger||31/2||8|
For SI units: 1 inch = 25 mm
- Cleanouts shall be permitted to be omitted on a horizontal drain line less than 5 feet (1524 mm) in length unless such line is serving sinks or urinals.
- Cleanouts shall be permitted to be omitted on a horizontal drainage pipe installed on a slope of 72 degrees (1.26 rad) or less from the vertical angle (one-fifth bend).
- Excepting the building drain, its horizontal branches, and urinals, a cleanout shall not be required on a pipe or piping that is above the floor level of the lowest floor of the building.
- An approved type of two-way cleanout fitting, installed inside the building wall near the connection between the building drain and the building sewer or installed outside of a building at the lower end of a building drain and extended to grade, shall be permitted to be substituted for an upper terminal cleanout.
- Shall have a discharge capacity of not less than 20 gpm (1.26 L/s).
- In single dwelling units, the ejector or pump shall be capable of passing an 11/2 inch (38 mm) diameter solid ball, and the discharge piping of each ejector or pump shall have a backwater valve and gate valve, and be not less than 2 inches (50 mm) in diameter.
- In other than single-dwelling units, the ejector or pump shall be capable of passing a 2 inch (51 mm) diameter solid ball, and the discharge piping of each ejector or pump shall have a backwater valve and gate valve, and be not less than 3 inches (80 mm) in diameter.
Gate or ball valves, where installed in drainage piping, shall be fullway type with working parts of corrosion-resistant metal. Sizes 4 inches (100 mm) or more in diameter shall have cast-iron bodies and sizes less than 4 inches (100 mm), cast-iron or copper alloy bodies.
Backwater valves shall comply with ASME A112.14.1, and have bodies of cast-iron, plastic, copper alloy, or other approved materials; shall have noncorrosive bearings, seats, and self-aligning discs; and shall be constructed to ensure a positive mechanical seal. Such backwater valves shall remain open during periods of low flows to avoid screening of solids and shall not restrict capacities or cause excessive turbulence during peak loads. Unless otherwise listed, valve access covers shall be bolted type with gasket, and each valve shall bear the manufacturer's name cast into the body and the cover.
Part II — Building Sewers
Exception: Single-family dwellings and buildings or structures accessory thereto, existing and connected to an approved private sewage disposal system prior to the time of connecting the premises to the public sewer shall be permitted, where no hazard, nuisance, or insanitary condition is evidenced, and written permission has been obtained from the Authority Having Jurisdiction, remain connected to such properly maintained private sewage disposal system where there is insufficient grade or fall to permit drainage to the sewer by gravity.
|SIZE OF PIPE |
(inches per foot)
|6 and smaller||(As specified in Table 703.2/No minimum loading)|
For SI units: 1 inch = 25 mm, 1 inch per foot = 83.3 mm/m
Exception: Where approved by the Authority Having Jurisdiction and where it is impractical, due to the depth of the street sewer or to the structural features or the arrangement of a building or structure, to obtain a slope of 1/4 inch per foot (20.8 mm/m), such pipe or piping 4 inches (100 mm) through 6 inches (150 mm) shall be permitted to have a slope of not less than 1/8 inch per foot (10.4 mm/m) and such piping 8 inches (200 mm) and larger shall be permitted to have a slope of not less than 1/16 inch per foot (5.2 mm/m).
Additional building sewer cleanouts shall be installed at intervals not to exceed 100 feet (30 480 mm) in straight runs and for each aggregate horizontal change in direction exceeding 135 degrees (2.36 rad).
The inlet and outlet connections shall be made by the use of a flexible compression joint not less than 12 inches (305 mm) and not exceeding 3 feet (914 mm) from the manhole. No flexible compression joints shall be embedded in the manhole base.
- The bottom of the water pipe, at points, shall be not less than 12 inches (305 mm) above the top of the sewer or drain line.
- The water pipe shall be placed on a solid shelf excavated at one side of the common trench with a clear horizontal distance of not less than 12 inches (305 mm) from the sewer or drain line.
- Water pipes crossing sewer or drainage piping constructed of clay or materials that are not approved for use within a building shall be laid not less than 12 inches (305 mm) above the sewer or drain pipe.
For the purpose of this section, "within a building" shall mean within the fixed limits of the building foundation.
|Buildings or structures1||2|
|Property line adjoining private property||Clear2|
|Water supply wells||503|
|On-site domestic water service line||14|
|Public water main||105, 6|
For SI units: 1 foot = 304.8 mm
1 Including porches and steps, whether covered or uncovered; breezeways; roofed porte-cochere; roofed patios; carports; covered walks; covered driveways; and similar structures or appurtenances.
2 Sec also Section 312.3.
3 Drainage piping shall clear domestic water supply wells by not less than 50 feet (15 240 mm). This distance shall be permitted to be reduced to not less than 25 feet (7620 mm) where the drainage piping is constructed of materials approved for use within a building.
4 See Section 720.0.
5 For parallel construction.
6 For crossings, approval by the Health Department or the Authority Having Jurisdiction shall be required.
- Provide access to connect a building sewer to an available public sewer where proper cause and legal easement, not in violation of other requirements, has been first established to the satisfaction of the Authority Having Jurisdiction.
- Provide additional space for a building sewer where the proper cause, transfer of ownership, or change of boundary, not in violation of other requirements, has been first established to the satisfaction of the Authority Having Jurisdiction. The instrument recording such action shall constitute an agreement with the Authority Having Jurisdiction and shall clearly state and show that the areas so joined or used shall be maintained as a unit during the time they are so used. Such an agreement shall be recorded in the office of the County Recorder as part of the conditions of ownership of said properties, and shall be binding on heirs, successors, and assigns to such properties. A copy of the instrument recording such proceedings shall be filed with the Authority Having Jurisdiction.