|OUTSIDE DIAMETER OF PIPE OR COVERING
|MINIMUM LENGTH OF COLOR FIELD
|MINIMUM SIZE OF LETTERS
|1/2 to 11/4||8||1/2|
|11/2 to 2||8||3/4|
|21/2 to 6||12||11/4|
|8 to 10||24||21/2|
- Gray water systems shall be marked in accordance with this section with the words "CAUTION: NONPOTABLE GRAY WATER, DO NOT DRINK" in black letters.
- Reclaimed (recycled) water systems shall be marked in accordance with this section with the words: "CAUTION: NONPOTABLE RECLAIMED (RECYCLED) WATER, DO NOT DRINK" in black letters.
- On-site treated water systems shall be marked in accordance with this section with the words: "CAUTION: ON-SITE TREATED NONPOTABLE WATER, DO NOT DRINK" in black letters.
- Rainwater catchment systems shall be marked in accordance with this section with the words: "CAUTION: NONPOTABLE RAINWATER, DO NOT DRINK" in black letters.
|DEGREE OF HAZARD|
|DEVICE, ASSEMBLY, OR METHOD1||APPLICABLE STANDARDS||POLLUTION (LOW HAZARD)||CONTAMINATION (HIGH HAZARD)||INSTALLATION2,3|
|Air gap||ASME A112.1.2||X||—||X||—||See Table 603.3.1 in this chapter.|
|Air gap fittings for use with plumbing fixtures, appliances, and appurtenances||ASME A112.1.3||X||—||X||—||Air gap fitting is a device with an internal air gap, and typical installation includes plumbing fixtures, appliances, and appurtenances. The critical level shall not be installed below the flood level rim.|
|Atmospheric vacuum breaker (consists of a body, checking member and atmospheric port)||ASSE 1001 or
|X||—||X||—||Upright position. Have outlet open to atmosphere. Minimum of 6 inches or listed distance above all downstream piping and flood level rim of receptor.4,5|
|Antisiphon fill valve (ballcocks) for gravity water closet flush tanks and urinal tanks||ASSE 1002/ ASME A112.1002/ CSA B125.12||X||—||X||—||Installation of gravity water closet flush tank and urinal tanks with the fill valve installed with the critical level not less than 1 inch above the opening of the overflow pipe.4,5|
|Vacuum breaker wall hydrants, hose bibbs, freeze resistant, automatic draining type||ASSE 1019 or
|X||—||X||—||Installation includes wall hydrants and hose bibbs. Such devices are not for use under continuous pressure conditions (means of shutoff downstream of device is prohibited).4,5|
|Hose connection vacuum breakers||ASSE 1011||X||—||X||—||Such devices are not for use under continuous pressure conditions. No valve downstream.4,6|
|Hose connection backflow preventers||ASSE 1052||X||—||X||—||Such devices are not for use under continuous pressure conditions.4,6|
|Dual check backflow preventer||ASSE 1024||X||X||—||—||Installation does not include carbonated drink dispensers.|
|Dual check backflow preventer wall hydrants, freeze resistant||ASSE 1053||X||—||X||—||Such devices are not for use under continuous pressure conditions.4|
|Freeze resistant sanitary yard hydrants||ASSE 1057||X||—||X||—||Such devices are not for use under continuous pressure conditions.4|
|Backflow preventer with intermediate atmospheric vent||ASSE 1012||X||X||—||—||Installation of potable water connections to water boilers. No high-hazard chemicals shall be introduced into the system using such devices. Designed to operate under continuous pressure conditions. May discharge water.|
|Backflow preventer with intermediate atmospheric vent and pressure reducing valve||ASSE 1081||X||X||—||—||Installation of potable water connections to water boilers. No high-hazard chemicals shall be introduced into the system using such devices. Designed to operate under continuous pressure conditions. May discharge water.|
|Backflow preventer for Carbonated Beverage Dispensers (two independent check valves with a vent to the atmosphere)||ASSE 1022||X||—||—||—||Installation includes carbonated beverage machines or dispensers. These devices operate under intermittent or continuous pressure conditions.|
|Spill-Resistant Pressure Vacuum Breaker (single check valve with air inlet vent and means of field testing)||ASSE 1056||X||—||X||—||Upright position. Minimum of 12 inches or listed distance above all downstream piping and flood-level rim of receptor.5|
|Double Check Valve Backflow Prevention Assembly (two independent check valves and means of field testing)||ASSE 1015; AWWA C510; CSA B64.5 or CSA B64.5.1||X||X||—||—||Horizontal unless otherwise listed. Access and clearance shall be in accordance with the manufacturer's instructions, and not less than a 12 inch clearance at the bottom for maintenance. May need platform/ladder for test and repair.
Does not discharge water.
|Double Check Detector Fire Protection Backflow Prevention Assembly (two independent check valves with a parallel detector assembly consisting of a water meter and a double check valve backflow prevention assembly and means for field testing)||ASSE 1048||X||X||—||—||Horizontal unless otherwise listed. Access and clearance shall be in accordance with the manufacturer's instructions, and not less than a 12 inch clearance at the bottom for maintenance. May need platform/ladder for test and repair. Does not discharge water. Installation includes a fire protection system and is designed to operate under continuous pressure conditions.|
|Pressure Vacuum Breaker Backflow Prevention Assembly (loaded air inlet valve, internally loaded check valve and means for field testing)||ASSE 1020 or CSA B64.1.2||X||—||X||—||Upright position. May have valves downstream. Minimum of 12 inches above all downstream piping and flood-level rim of the receptor. May discharge water.|
|Reduced Pressure Principle Backflow Prevention Assembly (two independently acting loaded check valves, a differential pressure relief valve and means for field testing)||ASSE 1013; AWWA C511; CSA B64.4 or CSA B64.4.1||X||X||X||X||Horizontal unless otherwise listed. Access and clearance shall be in accordance with the manufacturer's instructions, and not less than a 12 inch clearance at the bottom for maintenance. May need platform/ladder for test and repair. May discharge water.|
|Reduced Pressure Detector Fire Protection Backflow Prevention Assembly (two independently acting loaded check valves, a differential pressure relief valve, with a parallel detector assembly consisting of a water meter and a reduced-pressure principle backflow prevention assembly, and means for field testing)||ASSE 1047||X||X||X||X||Horizontal unless otherwise listed. Access and clearance shall be in accordance with the manufacturer's instructions, and not less than a 12 inch clearance at the bottom for maintenance. May need platform/ladder for test and repair. May discharge water. Installation includes a fire protection system and is designed to operate under continuous pressure conditions.|
|Laboratory faucet backflow preventer||ASSE 1035||—||—||X||X||Installation includes laboratory faucets. Such devices are not for use under continuous pressure conditions. No valve downstream.4|
|FIXTURES||WHERE NOT AFFECTED BY SIDEWALLS1
|WHERE AFFECTED BY SIDEWALLS2
|Effective openings3 not greater than 1/2 of an inch in diameter||1||11/2|
|Effective openings3 not greater than 3/4 of an inch in diameter||11/2||21/4|
|Effective openings3 not greater than 1 inch in diameter||2||3|
|Effective openings3 greater than 1 inch in diameter||Two times the diameter of
|Three times the diameter of
- An approved air gap.
- A listed vacuum breaker installed on the discharge side of the last valve with the critical level not less than 6 inches (152 mm) or in accordance with its listing.
- A backflow preventer suitable for the degree of hazard, installed in accordance with the requirements for that type of device or assembly as set forth in this chapter.
- Reduced pressure principle backflow prevention assembly (RP)
- Reduced pressure detector fire protection backflow prevention assembly
- The unit is equipped with a submerged fill line.
- The potable water supply is directly connected to the unit circulation system.
|MATERIAL||BUILDING SUPPLY PIPE AND FITTINGS||WATER DISTRIBUTION PIPE AND FITTINGS||REFERENCED STANDARD(S) PIPE||REFERENCED STANDARD(S) FITTINGS|
|Copper and Copper Alloys||X||X||ASTM B42, ASTM B43, ASTM B75, ASTM B88, ASTM B135, ASTM B251, ASTM B302, ASTM B447||ASME B16.15, ASME B16.18, ASME B16.22, ASME B16.26, ASME B16.502, ASME B16.51, ASSE 1061, ASTM F3226, IAPMO PS 117|
|CPVC||X||X||ASTM D2846, ASTM F441, ASTM F442, CSA B137.6||ASSE 1061, ASTM D2846, ASTM F437, ASTM F438, ASTM F439, ASTM F1970, CSA B137.6|
|CPVC-AL-CPVC||X||X||ASTM F2855||ASTM D2846|
|Ductile-Iron||X||X||AWWA C151||ASME B16.4, AWWA C110, AWWA C153|
|Galvanized Steel||X||X||ASTM A53||—|
|Malleable Iron||X||X||—||ASME B16.3|
|PE||X1||—||ASTM D2239, ASTM D2737, ASTM D3035, AWWA C901, CSA B137.1||ASTM D2609, ASTM D2683, ASTM D3261, ASTM F1055, CSA B137.1|
|PE-AL-PE||X||X||ASTM F1282, CSA B137.9||ASTM F1282, ASTM F1974, CSA B137.9|
|PE-AL-PEX||X||X||ASTM F1986||ASTM F1986|
|PE-RT||X||X||ASTM F2769, CSA B137.18||ASSE 1061, ASTM D3261, ASTM F1055, ASTM F1807, ASTM F2098, ASTM F2159, ASTM F2735, ASTM F2769, CSA B137.18|
|PEX||X||X||ASTM F876, CSA B137.5, AWWA C9041||ASSE 1061, ASTM F877, ASTM F1807, ASTM F1960, ASTM F2080, ASTM F2159, ASTM F2735, CSA B137.5|
|PEX-AL-PEX||X||X||ASTM F1281, CSA B137.10||ASTM F1281, ASTM F1974, ASTM F2434, CSA B137.10|
|PP||X||X||ASTM F2389, CSA B137.11||ASTM F2389, CSA B137.11|
|PVC||X1||—||ASTM D1785, ASTM D2241, AWWA C900||ASTM D2464, ASTM D2466, ASTM D2467, ASTM F1970, AWWA C907|
|Stainless Steel||X||X||ASTM A269, ASTM A312, ASTM A554, ASTM A778||ASTM F3226, IAPMO PS 117|
- Pipes, pipe fittings, plumbing fittings, fixtures, or backflow preventers used for nonpotable services such as manufacturing, industrial processing, irrigation, outdoor watering, or any other uses where the water is not used for human consumption.
- Flush valves, fill valves, flushometer valves, tub fillers, shower valves, service saddles, or water distribution main gate valves that are 2 inches (50 mm) in diameter or larger.
- Fixture Connectors — 30 inches (762 mm)
- Washing Machine Connectors — 72 inches (1829 mm)
- Dishwasher and Icemaker Connectors — 120 inches (3048 mm)
- Not less than the size of the valve outlet and shall discharge full size to the flood level of the area receiving the discharge and pointing down.
- Materials shall be rated at not less than the operating temperature of the system and approved for such use or shall comply with ASME A112.4.1.
- Discharge pipe shall discharge independently by gravity through an air gap into the drainage system or outside of the building with the end of the pipe not exceeding 2 feet (610 mm) and not less than 6 inches (152 mm) above the ground and pointing downwards.
- Discharge in such a manner that does not cause personal injury or structural damage.
- No part of such discharge pipe shall be trapped or subject to freezing.
- The terminal end of the pipe shall not be threaded.
- Discharge from a relief valve into a water heater pan shall be prohibited.
- The discharge termination point shall be readily observable.
- The bottom of the water pipe 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.
- Ferrous piping shall have a protective coating of an approved type; machine applied and in accordance with recognized standards. Field wrapping shall provide equivalent protection and shall be restricted to those short sections and fittings necessarily stripped for threading. Zinc coating (galvanizing) shall not be deemed adequate protection for piping or fittings. Approved nonferrous piping shall not be required to be wrapped.
- Copper or copper alloy tubing shall be installed without joints where possible. Where joints are permitted, they shall be brazed, and fittings shall be wrought copper.
- Provide access to connect a building supply to an available public water service where proper cause and legal easement not in violation of other requirements have been first established to the satisfaction of the Authority Having Jurisdiction.
- Provide additional space for a building supply where the proper cause, transfer of ownership, or change of boundary not in violation of other requirements have 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, which 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 a 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.
- The pipe system shall be flushed with clean, potable water until potable water appears at the points of the outlet.
- The system or parts thereof shall be filled with a water-chlorine solution containing not less than 50 parts per million of chlorine, and the system or part thereof shall be valved-off and allowed to stand for 24 hours; or, the system or part thereof shall be filled with a water-chlorine solution containing not less than 200 parts per million of chlorine and allowed to stand for 3 hours.
- Following the allowed standing time, the system shall be flushed with clean, potable water until the chlorine residual in the water coming from the system does not exceed the chlorine residual in the flushing water.
- The procedure shall be repeated where it is shown by a bacteriological examination made by an approved agency that contamination persists in the system.
|APPLIANCES, APPURTENANCES OR FIXTURES2||MINIMUM FIXTURE BRANCH PIPE SIZE1, 4
|Bathtub or Combination Bath/Shower (fill)||1/2||4.0||4.0||—|
|3/4 inch Bathtub Fill Valve||3/4||10.0||10.0||—|
|Dental Unit, cuspidor||1/2||—||1.0||—|
|Drinking Fountain or Water Cooler||1/2||0.5||0.5||0.75|
|Hose Bibb, each additional8||1/2||1.0||1.0||—|
|Lawn Sprinkler, each head5||—||1.0||1.0||—|
|Mobile Home, each (minimum)||—||12.0||—||—|
|Clinical Flushometer Valve with or without faucet||1||—||8.0||—|
|Kitchen, domestic with or without dishwasher||1/2||1.5||1.5||—|
|Service or Mop Basin||1/2||1.5||3.0||—|
|Washup, each set of faucets||1/2||—||2.0||—|
|Shower, per head||1/2||2.0||2.0||—|
|Urinal, 1.0 GPF Flushometer Valve||3/4||See Footnote7||—|
|Urinal, greater than 1.0 GPF Flushometer Valve||3/4||See Footnote7||—|
|Urinal, flush tank||1/2||2.0||2.0||3.0|
|Urinal with Drain Cleansing Action||1/2||1.0||1.0||1.0|
|Wash Fountain, circular spray||3/4||—||4.0||—|
|Water Closet, 1.6 GPF Gravity Tank||1/2||2.5||2.5||3.5|
|Water Closet, 1.6 GPF Flushometer Tank||1/2||2.5||2.5||3.5|
|Water Closet, 1.6 GPF Flushometer Valve||1||See Footnote7||—|
|Water Closet, greater than 1.6 GPF Gravity Tank||1/2||3.0||5.5||7.0|
|Water Closet, greater than 1.6 GPF Flushometer Valve||1||See Footnote7||—|
|METER AND STREET SERVICE
|BUILDING SUPPLY AND BRANCHES
|MAXIMUM ALLOWABLE LENGTH
|PRESSURE RANGE — 30 to 45 psi1|
|PRESSURE RANGE — 46 to 60 psi1|
|PRESSURE RANGE — Over 60 psi1|
- Total number of fixture units as determined from Table 610.3, Equivalent Fixture Units, for the fixtures to be installed.
- Developed length of supply pipe from meter to the most remote outlet.
- Difference in elevation between the meter or other source of supply and the highest fixture or outlet.
- Pressure in the street main or another source of supply at the locality where the installation is to be made.
- In localities where there is a fluctuation of pressure in the main throughout the day, the water piping system shall be designed on the basis of the minimum pressure available.
- Determine the available pressure at the water meter or other source of supply.
- Add or subtract depending on positive or negative elevation change, 1/2 psi (3.4 kPa) for each foot (305 mm) of difference in elevation between such source of supply and the highest water supply outlet in the building or on the premises.
- Use the "pressure range" group within which this pressure will fall using Table 610.4.
- Select the "length" column that is equal to or longer than the required length.
- Follow down the column to a fixture unit value equal to or exceeding the total number of fixture units required by the installation.
- Having located the proper fixture unit value for the required length, sizes of meter and building supply pipe as found in the two left-hand columns shall be applied.
|FIXTURE CATEGORY: WATER CLOSET WITH FLUSHOMETER VALVES|
|NUMBER OF FLUSHOMETER VALVES||INDIVIDUAL FIXTURE UNITS ASSIGNED IN DECREASING VALUE||FIXTURE UNITS ASSIGNED FOR WATER CLOSETS AND SIMILAR 10-UNIT FIXTURES IN ACCUMULATIVE VALUES|
|5 or more||10 each||115 plus 10 for each additional fixture in excess of 5|
|FIXTURE CATEGORY: URINALS WITH FLUSHOMETER VALVES|
|NUMBER OF FLUSHOMETER VALVES||INDIVIDUAL FIXTURE UNITS ASSIGNED IN DECREASING VALUE||FIXTURE UNITS ASSIGNED FOR URINALS AND SIMILAR 5-UNIT FIXTURES IN ACCUMULATIVE VALUES|
|5 or more||5 each||58 plus 5 for each additional fixture in excess of 5|
|A:||1 WC = 40 F.U.|
|B:||2 WC = 70 F.U.|
|C:||2 WC (70) + 1 UR (20) = 90 F.U.|
|D:||2 WC (70) + 2 UR (35) = 105 F.U.|
|E:||2 WC (70) + 2 UR (35) + 1 LAV (1) = 106 F.U.|
|F:||2 WC (70) + 2 UR (35) + 2 LAV (2) = 107 F.U.|
|G:||1 LAV = 1 F.U.|
|H:||2 LAV = 2 F.U.|
|I:||2 LAV (2) + 1 UR (20) = 22 F.U.|
|J:||2 LAV (2)+ 2 UR (35) = 37 F.U.|
|K:||2 LAV (2) + 2 UR (35) + 1 WC (40) = 77 F.U.|
|L:||2 LAV (2) + 2 UR (35) + 2 WC (70) = 107 F.U.|
|M:||4 WC (105) + 4 UR (53) + 4 LAV (4) = 162 F.U.|
|N:||1 WC = 40 F.U.|
|O:||1 WC (40) + 1 UR (20) = 60 F.U.|
|P:||1 WC (40) + 1 UR (20) + 1 LAV (1) = 61 F.U.|
|Q:||2 WC (70) + 1 UR (20) + 1 LAV (1) = 91 F.U.|
|R:||2 WC (70) + 2 UR (35) + 1 LAV (1) = 106 F.U.|
|S:||2 WC (70) + 2 UR (35) + 2 LAV (2) = 107 F.U.|
|T:||6 WC (125) + 6 UR (63) + 6 LAV (6) = 194 F.U.|
SIZING METHOD FOR PUBLIC USE FIXTURES USING TABLE 610.10
- Water supply piping systems designed in accordance with recognized engineering procedures acceptable to the Authority Having Jurisdiction.
- Alteration of or minor additions to existing installations provided the Authority Having Jurisdiction finds that there will be an adequate supply of water to operate fixtures.
- Replacement of existing fixtures or appliances.
- Piping that is part of fixture equipment.
- Unusual conditions where, in the judgment of the Authority Having Jurisdiction, an adequate supply of water is provided to operate fixtures and equipment.
- The size and material of irrigation water piping installed outside of a building or structure and separated from the potable water supply by means of an approved air gap or backflow prevention device are not regulated by this code. The potable water piping system supplying each such irrigation system shall be adequately sized as required elsewhere in this chapter to deliver the full connected demand of both the domestic use and the irrigation systems.
|POINT OF USE||POINT OF ENTRY|
|Aesthetic Contaminant Reduction (filters)||NSF 42||NSF 42||ASSE 1087 and NSF 42*|
|Health Related Contaminant Reduction (filters)||NSF 53||NSF 53||ASSE 1087 and NSF 53*|
|Water Softener||-||NSF 44||ASSE 1087|
|Ultraviolet Water Treatment||NSF 55||NSF 55||ASSE 1087|
|Reverse Osmosis||NSF 58||NSF 61||ASSE 1087|
|Distillation||NSF 62||NSF 62||ASSE 1087|
|REQUIRED SIZE OF SOFTENER CONNECTION (inches)||NUMBER OF BATHROOM GROUPS SERVED1|
|3/4||up to 22|
|1||up to 43|