HomeMy WebLinkAbout2018 Plumbing Code Amendments603.3.9 Reduced Pressure Detector Fire Protec-
tion Backflow Prevention Assembly.A reduced-pressure principle backflow prevention assembly with aparallel detector assembly consisting of a water meterand a reduced-pressure principle backflow preventionassembly (RP).
603.4 General Requirements. Assemblies shall complywith listed standards and be acceptable to the Authority Hav-ing Jurisdiction, with jurisdiction over the selection andinstallation of backflow prevention assemblies.
603.4.1 Backflow Prevention Valve.Where morethan one backflow prevention valve is installed on a sin-gle premise, and the valves are installed in one location,each separate valve shall be permanently identified bythe permittee in a manner satisfactory to the AuthorityHaving Jurisdiction.
603.4.2 Testing. The premise owner or responsible per-son shall have the backflow prevention assembly testedby a certified backflow assembly tester at the time ofinstallation, repair, or relocation and not less than on anannual schedule thereafter, or more often where requiredby the Authority Having Jurisdiction. The periodic test-ing shall be performed in accordance with the proceduresreferenced in ASSE Series 5000 by a tester qualified inaccordance with those standards.
603.4.3 Access and Clearance.Access and clear-ance shall be provided for the required testing, mainte-nance, and repair. Access and clearance shall be inaccordance with the manufacturer’s instructions, and notless than 12 inches (305 mm) between the lowest portionof the assembly and grade, floor, or platform. Installations
elevated that exceed 5 feet (1524 mm) above the floor orgrade shall be provided with a permanent platform capa-ble of supporting a tester or maintenance person.
603.4.4 Connections.Direct connections betweenpotable water piping and sewer-connected wastes shallnot be permitted to exist un der any condition with orwithout backflow protection. Where potable water is dis-charged to the drainage system, it shall be by means of anapproved air gap of two pipe diameters of the supplyinlet, but in no case shall the gap be less than 1 inch (25.4mm). Connection shall be permitted to be made to theinlet side of a trap provided that an approved vacuumbreaker is installed not less than 6 inches (152 mm), orthe distance according to the device’s listing, above theflood-level rim of such trapped fixture, so that at no timewill such device be subjected to backpressure.
603.4.5 Hot Water Backflow Preventers. Backflowpreventers for hot water exceeding 110°F (43°C) shallbe a type designed to operate at temperatures exceeding110°F (43°C) without rendering a portion of the assem-bly inoperative.
603.4.6 Integral Backflow Preventers. Fixtures,appliances, or appurtenances with integral backflow pre-venters or integral air gaps manufactured as a unit shallbe installed in accordance with their listing requirementsand the manufacturer’s installation instructions.
603.4.7 Freeze Protection. In cold climate areas,backflow assemblies and devices shall be protected fromfreezing with an outdoor enclosure in accordance withASSE 1060 or by a method acceptable to the AuthorityHaving Jurisdiction.
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FIXTURES WHERE NOT AFFECTED BY SIDEWALLS1
(inches)
WHERE AFFECTED BY SIDEWALLS2
(inches)Effective openings3 not greater than 1⁄2 of aninch in diameter 1 11⁄2
Effective openings3 not greater than 3⁄4 of aninch in diameter 11⁄2 21⁄4
Effective openings3 not greater than 1 inchin diameter 2 3
Effective openings3 greater than 1 inch indiameter Two times the diameter of effective opening Three times the diameter of effective opening
For SI units: 1 inch = 25.4 mmNotes:1 Sidewalls, ribs, or similar obstructions do not affect air gaps where spaced from the inside edge of the spout opening a distance exceeding three times thediameter of the effective opening for a single wall, or a distance exceeding four times the effective opening for two intersecting walls.2 Vertical walls, ribs, or similar obstructions extending from the water surface to or above the horizontal plane of the spout opening other than specified in Foot-note 1 above. The effect of three or more such vertical walls or ribs has not been determined. In such cases, the air gap shall be measured from the top of thewall.3 The effective opening shall be the minimum cross-sectional area at the seat of the control valve or the supply pipe or tubing that feeds the device or outlet.Where two or more lines supply one outlet, the effective opening shall be the sum of the cross-sectional areas of the individual supply lines or the area of thesingle outlet, whichever is smaller.4 Air gaps less than 1 inch (25.4 mm) shall be approved as a permanent part of a listed assembly that has been tested under actual backflow conditions withvacuums of 0 to 25 inches of mercury (85 kPa).
TABLE 603.3.1
MINIMUM AIR GAPS FOR WATER DISTRIBUTION4
603.4.8 Drain Lines.Drain lines serving backflowdevices or assemblies shall be sized in accordance withthe discharge rates of the manufacturer’s flow charts ofsuch devices or assemblies.
603.4.9 Prohibited Locations.Backflow preventiondevices with atmospheric vents or ports shall not beinstalled in pits, underground, or submerged locations.Backflow preventers shall not be located in an area con-taining fumes that are toxic, poisonous, or corrosive.
603.5 Specific Requirements. Specific requirements forbackflow prevention shall comply with Section 603.5.1through Section 603.5.20.
603.5.1 Atmospheric Vacuum Breaker. Watercloset and urinal flushometer valves shall be protectedagainst backflow by an approved backflow preventionassembly, device, or method. Where the valves areequipped with an atmospheric vacuum breaker, the vac-uum breaker shall be installed on the discharge side ofthe flushometer valve with the critical level not less than6 inches (152 mm), or the distance according to its list-ing, above the overflow rim of a water closet bowl or thehighest part of a urinal.
603.5.2 Ballcock. Water closet and urinal tanks shallbe equipped with a ballcock. The ballcock shall beinstalled with the critical level not less than 1 inch (25.4mm) above the full opening of the overflow pipe. Incases where the ballcock has no hush tube, the bottom ofthe water supply inlet shall be installed 1 inch (25.4 mm)above the full opening of the overflow pipe.
603.5.3 Backflow Prevention. Water closet flushome-ter tanks shall be protected against backflow by an approvedbackflow prevention assembly, device, or method.
603.5.4 Heat Exchangers. Heat exchangers used forheat transfer, heat recovery, or solar heating shall protectthe potable water system from being contaminated by theheat-transfer medium. Single-wall heat exchangers usedin indirect-fired water heaters shall meet the require-ments of Section 505.4.1. Double-wall heat exchangersshall separate the potable water from the heat-transfermedium by providing a space between the two walls thatare vented to the atmosphere.
603.5.5 Water Supply Inlets.Water supply inlets totanks, vats, sumps, swimming pools, and other receptorsshall be protected by one of the following means:(1)An approved air gap.(2)A listed vacuum breaker installed on the dischargeside of the last valve with the critical level not less than6 inches (152 mm) or in accordance with its listing.(3)A backflow preventer suitable for the degree of haz-ard, installed in accordance with the requirementsfor that type of device or assembly as set forth in thischapter.
603.5.6 Protection from Lawn Sprinklers and Irri-
gation Systems. Potable water supplies to systemshaving no pumps or connections for pumping equipment,and no chemical injection or provisions for chemicalinjection, shall be protected from backflow by one of thefollowing devices:
(1)Atmospheric vacuum breaker (AVB)(2)Pressure vacuum breaker backflow preventionassembly (PVB)(3)Spill-resistant pressure vacuum breaker (SVB)(4)Reduced-pressure principle backflow preventionassembly (RP)
603.5.6.1 Systems with Pumps. Where sprin-kler and irrigation systems have pumps, connectionsfor pumping equipment, or auxiliary air tanks, or areotherwise capable of creating backpressure, thepotable water supply shall be protected by the fol-lowing type of device where the backflow device islocated upstream from the source of backpressure:(1)Reduced-pressure principle backflow preven-tion assembly (RP)
603.5.6.2 Systems with Backflow Devices.Where systems have a backflow device installeddownstream from a potable water supply pump or apotable water supply pump connection, the deviceshall be one of the following:(1)Atmospheric vacuum breaker (AVB)(2)Pressure vacuum breaker backflow preventionassembly (PVB)(3)Spill-resistant pressure vacuum breaker (SVB)(4)Reduced-pressure principle backflow preven-tion assembly (RP)
603.5.6.3 Systems with Chemical Injectors.Where systems include a chemical injector or pro-visions for chemical injection, the potable water sup-ply shall be protected by a reduced-pressureprinciple backflow prevention assembly (RP).
603.5.7 Outlets with Hose Attachments. Potablewater outlets with hose attachments, other than waterheater drains, boiler drains, freeze resistant yard hydrantsand clothes washer connections, shall be protected by anonremovable hose bibb-type backflow preventer, a non-removable hose bibb-type vacuum breaker, or by anatmospheric vacuum breaker installed not less than 6inches (152 mm) above the highest point of usage locatedon the discharge side of the last valve. In climates wherefreezing temperatures occur, a listed self-draining frost-proof hose bibb with an integral backflow preventer orvacuum breaker shall be used.
603.5.8 Water-Cooled Equipment. Water-cooledcompressors, degreasers, or other water-cooled equip-ment shall be protected by a backflow preventer installedin accordance with the requirements of this chapter.Water-cooled equipment that produces backpressureshall be equipped with the appropriate protection.
603.5.9 Aspirators. Water inlets to water-suppliedaspirators shall be equipped with a vacuum breakerinstalled in accordance with its listing requirements andthis chapter. The discharge shall drain through an air gap.Where the tailpiece of a fixture to receive the dischargeof an aspirator is used, the air gap shall be located abovethe flood-level rim of the fixture.
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603.5.10 Steam or Hot Water Boilers. Potable waterconnections to steam or hot water boilers shall be pro-tected from backflow by a double check valve backflowprevention assembly or reduced pressure principle back-flow prevention assembly in accordance with Table603.2. Where chemicals are introduced into the system areduced pressure principle backflow prevention assem-bly shall be provided in accordance with Table 603.2.
603.5.11 Nonpotable Water Piping.In cases whereit is impractical to correct individual cross-connectionson the domestic waterline, the line supplying such outletsshall be considered a nonpotable water line. No drinkingor domestic water outlets shall be connected to the non-potable waterline. Where possible, portions of the non-potable waterline shall be exposed, and exposed portionsshall be properly identified in a manner satisfactory tothe Authority Having Jurisdiction. Each outlet on thenonpotable waterline that is permitted to be used fordrinking or domestic purposes shall be posted: “CAU-TION: NONPOTABLE WATER, DO NOT DRINK.”
603.5.12 Beverage Dispensers. Potable water sup-ply to beverage dispensers, carbonated beverage dis-pensers, or coffee machines shall be protected by an airgap or a Reduced Pressure Principle Backflow Preven-tion Assembly in accordance with ASSE 1013. For car-bonated beverage dispensers, piping material installeddownstream of the backflow preventer shall not beaffected by carbon dioxide gas.
603.5.13 Deck-Mounted and Equipment-
Mounted Vacuum Breakers. Deck-mounted orequipment-mounted vacuum breakers shall be installedin accordance with their listing and the manufacturer’sinstallation instructions, with the critical level not lessthan 1 inch (25.4 mm) above the flood-level rim.
603.5.14 Protection from Fire Systems. Except asprovided under Section 603.5.14.1 and Section603.5.14.2, potable water supplies to fire protection sys-tems that are normally under pressure, including but notlimited to standpipes and automatic sprinkler systems,except in one- or two-family or townhouse residentialsprinkler systems, piped in materials approved forpotable water distribution systems shall be protectedfrom backpressure and backsiphonage by one of the fol-lowing testable devices:(1)Double check valve backflow prevention assembly(DC)(2)Double check detector fire protection backflow pre-vention assembly(3)Reduced pressure principle backflow preventionassembly (RP)(4)Reduced pressure detector fire protection backflowprevention assemblyPotable water supplies to fire protection systems thatare not normally under pressure shall be protected frombackflow and shall be in accordance with the requirementsof the appropriate standards referenced in Table 1701.1.
603.5.14.1 Fire Department Connection.Where fire protection systems supplied from a
potable water system include a fire department(siamese) connection that is located less than 1700feet (518.2 m) from a nonpotable water source thatis capable of being used by the fire department as asecondary water supply, the potable water supplyshall be protected by one of the following:(1)Reduced pressure principle backflow preven-tion assembly (RP)(2)Reduced pressure detector fire protection back-flow prevention assemblyNonpotable water sources include fire depart-ment vehicles carrying water of questionable qualityor water that is treated with antifreeze, corrosioninhibitors, or extinguishing agents.
603.5.14.2 Chemicals.Where antifreeze, corro-sion inhibitors, or other chemicals are added to a fireprotection system supplied from a potable watersupply, the potable water system shall be protectedby one of the following:(1)Reduced pressure principle backflow preven-tion assembly (RP)(2)Reduced pressure detector fire protection back-flow prevention assembly
603.5.14.3 Hydraulic Design. Where a backflowdevice is installed in the potable water supply to afire protection system, the hydraulic design of thesystem shall account for the pressure drop throughthe backflow device. Where such devices are retro-fitted for an existing fire protection system, thehydraulics of the sprinkler system design shall bechecked to verify that there will be sufficient waterpressure available for satisfactory operation of thefire sprinklers.
603.5.15 Health Care or Laboratory Areas. Vac-uum breakers for washer-hose bedpans shall be locatednot less than 5 feet (1524 mm) above the floor. Hose con-nections in health care or laboratory areas shall be notless than 6 feet (1829 mm) above the floor.
603.5.16 Special Equipment. Portable cleaningequipment, dental vacuum pumps, and chemical dis-pensers shall be protected from backflow by an air gap,an atmospheric vacuum breaker, a spill-resistant vacuumbreaker, or a reduced pressure principle backflow pre-venter.
603.5.17 Potable Water Outlets and Valves.Potable water outlets, freeze-proof yard hydrants, com-bination stop-and-waste valves, or other fixtures thatincorporate a stop and waste feature that drains into theground shall not be installed underground.
603.5.18 Pure Water Process Systems. The watersupply to a pure water process system, such as dialysiswater systems, semiconductor washing systems, and sim-ilar process piping systems, shall be protected from back-pressure and backsiphonage by a reduced-pressureprinciple backflow preventer.
603.5.18.1 Dialysis Water Systems. The indi-vidual connections of the dialysis related equipment
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to the dialysis pure water system shall not requireadditional backflow protection.
603.5.19 Plumbing Fixture Fittings. Plumbing fix-ture fittings with integral backflow protection shall com-ply with ASME A112.18.1/CSA B125.1.
603.5.20 Swimming Pools, Spas, and Hot Tubs.Potable water supply to swimming pools, spas, and hottubs shall be protected by an air gap or a reduced pres-sure principle backflow preventer in accordance with thefollowing:(1)The unit is equipped with a submerged fill line.(2)The potable water supply is directly connected to theunit circulation system.
603.5.21 Chemical Dispensers .The water supply tochemical dispensers shall be protected against backflow.The chemical dispenser shall comply with ASSE 1055 orthe water supply shall be protected by one of the follow-ing methods:(a)Air gap(b)Atmospheric vacuum breaker (AVB)(c)Pressure vacuum breaker backflow preventionassembly (PVB)(d)Spill-resistant pressure vacuum breaker (SVB)(e)Reduced-pressure principle backflow preventionassembly (RP)
604.0 Materials.
604.1 Pipe, Tube, and Fittings. Pipe, tube, fittings, sol-vent cements, thread sealants, solders, and flux used inpotable water systems intended to supply drinking water shallbe in accordance with the requirements of NSF 61. Where fit-tings and valves are made from copper alloys containing morethan 15 percent zinc by weight, and are used in plastic pipingsystems, they shall be resistant to dezincification and stresscorrosion cracking in accordance with NSF 14.Materials used in the water supply system, except valvesand similar devices, shall be of a like material, except whereotherwise approved by the Authority Having Jurisdiction.Materials for building water piping and building supplypiping shall comply with the applicable standards referencedin Table 604.1.
604.2 Lead Content.The maximum allowable lead contentin pipes, pipe fittings, plumbing fittings, and fixtures intendedto convey or dispense water for human consumption shall benot more than a weighted average of 0.25 percent with respectto the wetted surfaces of pipes, pipe fittings, plumbing fittings,and fixtures. For solder and flux, the lead content shall be notmore than 0.2 percent where used in piping systems that con-vey or dispense water for human consumption.Exceptions:(1)Pipes, pipe fittings, plumbing fittings, fixtures, or back-flow preventers used for nonpotable services such asmanufacturing, industrial processing, irrigation, outdoorwatering, or any other uses where the water is not usedfor human consumption.
(2)Flush valves, fill valves, flushometer valves, tub fillers,shower valves, service saddles, or water distributionmain gate valves that are 2 inches (50 mm) in diameteror larger.
604.2.1 Lead Content of Water Supply Pipe and
Fittings.Pipes, pipe fittings, valves, and faucets utilizedin the water supply system for non-drinking water appli-cations shall have a maximum of 8 percent lead content.
604.3 Copper or Copper Alloy Tube. Copper or copperalloy tube for water piping shall have a weight of not less thanType L.Exception:Type M copper or copper alloy tubing shall be per-mitted to be used for water piping where piping is abovegroundin, or in, a building or underground outside of structures.
604.4 Hard-Drawn Copper or Copper Alloy Tubing.Hard-drawn copper or copper alloy tubing for water supplyand distribution in addition to the required incised marking,shall be marked in accordance with ASTM B88. The colorsshall be: Type K, green; Type L, blue; and Type M, red.
604.5 Flexible Connectors. Flexible water connectorsshall be installed in readily accessible locations, and whereunder continuous pressure shall be in accordance with ASMEA112.18.6/CSA B125.6.
604.6 Cast-Iron Fittings. Cast-iron fittings up to andincluding 2 inches (50 mm) in size, where used in connectionwith potable water piping, shall be galvanized.
604.7 Malleable Iron Fittings. Malleable iron water fit-tings shall be galvanized.
604.8 Previously Used Piping and Tubing. Piping andtubing that has previously been used for a purpose other thanfor potable water systems shall not be used.
604.9 Epoxy Coating. Epoxy coating used on existing,underground steel building supply piping shall be in accor-dance with NSF 61 and AWWA C210.
604.10 Plastic Materials. Approved plastic materials shallbe permitted to be used in building supply piping, providedthat where metal building supply piping is used for electricalgrounding purposes, replacement piping therefore shall be oflike materials.Exception: Where a grounding system acceptable to theAuthority Having Jurisdiction is installed, inspected, andapproved, metallic pipe shall be permitted to be replaced withnonmetallic pipe.
604.10.1 Tracer Wire .Plastic materials for buildingsupply piping outside underground shall have a blueinsulated copper tracer wire or other approved conductorinstalled adjacent to the piping. Access shall be providedto the tracer wire or the tracer wire shall terminate above-ground at each end of the nonmetallic piping. The tracerwire size shall be not less than 18 AWG and the insula-tion type shall be suitable for direct burial.Exception: Where the electrical wiring for the pump isinstalled in the same trench as the water line, from thepoint of origin to the structure, a tracer wire shall not berequired.
604.11 Solder. Solder shall comply with the requirements ofSection 604.2.
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