Office of Asst. Sec. for Housing, HUD § 3280.608

bathtubs and whirlpool bathtubs are to continuous waste, or trap of any sink be limited to a temperature of not or dishwashing machine. greater than 120 °F by a water tempera- (c) Installation—(1) Access. Each ture limiting device that conforms to plumbing fixture and standpipe recep- the requirements of ASSE 1070–2004, tor shall be located and installed in a Performance Requirements for Water manner to be accessible for usage, Temperature Limiting Devices (incor- cleaning, repair and replacement. Ac- porated by reference, see § 3280.4). cess to diverter valves and other con- (4) Dishwashing machines. (i) A dish- nections from the fixture hardware is washing machine must discharge its not required. waste through a fixed air gap installed (2) Alignment. Fixtures shall be set above the machine, through a high loop level and in true alignment with adja- as specified by the dishwashing ma- cent walls. Where practical, piping chine manufacturer, or into an open from fixtures shall extend to nearest standpipe receptor with a height great- wall. er than the washing compartment of (3) Brackets. Wall-hung fixtures shall the machine. When a standpipe is used, be rigidly attached to walls by metal it must be at least 18 inches, but not brackets or supports without any more than 30 inches, above the trap strain being transmitted to the piping weir. The drain connections from the connections. Flush tanks shall be se- air gap or high loop are permitted to curely fastened to toilets or to the wall connect to an individual trap to a di- with corrosive-resistant materials. rectional fitting installed in the sink (4) Tub supports. Bathtub rims at wall tailpiece or to an opening provided on shall be supported on metal hangers or the inlet side of a food waste disposal on end-grain wood blocking attached to unit. the wall unless otherwise recommended (ii) Drain from a dishwashing ma- by the manufacturer of the tub. chine shall not be connected to a sink (5) Fixture fittings. Faucets and tailpiece, continuous waste line, or diverters shall be installed so that the trap on the discharge side of a food flow of hot water from the fittings cor- waste disposal unit. responds to the left-hand side of the fitting. (5) Clothes washing machines. (i) (6) Hydromassage bathtub—(i) Access Clothes washing machines shall drain panel. A door or panel of sufficient size either into a properly vented trap, into must be installed to provide access to a laundry tub tailpiece with watertight the pump for repair or replacement. connections, into an open standpipe re- (ii) Piping drainage. The circulation ceptor, or over the rim of a laundry pump must be accessibly located above tub. the crown weir of the trap. The pump 1 (ii) Standpipes must be either 1 ⁄2 drain line must be properly sloped to inch diameter minimum nominal iron drain the volute after fixture use. 1 pipe size, 1 ⁄2 inch diameter nominal (iii) Piping. Hydromassage bathtub brass tubing of not less than No. 20 circulation piping must be installed to Brown and Sharp gauge, or 11⁄2 inch di- be self-draining. ameter approved plastic materials. Re- (iv) Electrical. Wiring must comply ceptors must discharge into a vented with Articles 680.70, 680.71, and 680.72 of trap or must be connected to a laundry the National Electrical Code, NFPA tub appliance by means of an approved No. 70–2005. or listed directional fitting. Each standpipe must extend not less than 18 [40 FR 58752, Dec. 18, 1975, as amended at 42 inches or more than 42 inches above its FR 961, Jan. 4, 1977. Redesignated at 44 FR 20679, Apr. 6, 1979, as amended at 52 FR 4586, trap and must terminate in an acces- Feb. 12, 1987; 58 FR 55014, Oct. 25, 1993; 70 FR sible location no lower than the top of 72049, Nov. 30, 2005; 71 FR 19639, Apr. 17, 2006; the clothes washing machine. A remov- 78 FR 73985, Dec. 9, 2013; 79 FR 31863, June 3, able, tight-fitting cap or plug must be 2014] installed on the standpipe when the clothes washer is not provided. § 3280.608 Hangers and supports. (iii) Clothes washing machine drain (a) Strains and stresses. Piping in a shall not be connected to the tailpiece, plumbing system shall be installed

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without undue strains and stresses, and ‘‘Fresh Water Connection’’ (or marked provision shall be made for expansion, ‘‘Fresh Water Fill’’). A matching cap or contraction, and structural settlement. plug shall be provided to seal the water (b) Piping supports. Piping shall be se- inlet when it is not in use, and shall be cured at sufficiently close intervals to permanently attached to the manufac- keep the pipe in alignment and carry tured home or water supply piping. the weight of the pipe and contents. When a master cold water shutoff full Unless otherwise stated in the stand- flow valve is not installed on the main ards for specific materials shown in the feeder line in an accessible location, table in § 3280.604(a), or unless specified the manufacturer’s installation in- by the pipe manufacturer, plastic structions shall indicate that such a drainage piping shall be supported at valve is to be installed in the water intervals not to exceed 4 feet and plas- supply line adjacent to the home. When tic water piping shall be supported at a manufactured home includes expand- intervals not to exceed 3 feet. able rooms or is composed of two or (c) Hangers and anchors. (1) Hangers more units, fittings or connectors de- and anchors shall be of sufficient signed for such purpose shall be pro- strength to support their proportional vided to connect any water piping. share of the pipe alignments and pre- When not connected, the water piping vent rattling. shall be protected by means of match- (2) Piping shall be securely attached ing threaded caps or plugs. to the structure by hangers, clamps, or (2) Prohibited connections. (i) The in- brackets which provide protection stallation of potable water supply pip- against motion, vibration, road shock, ing or fixture or appliance connections or torque in the chassis. shall be made in a manner to preclude (3) Hangers and straps supporting the possibility of backflow. plastic pipe shall not compress, distort, (ii) No part of the water system shall cut or abrade the piping and shall be connected to any drainage or vent allow free movement of the pipe. piping. (3) Rim outlets. The outlets of faucets, § 3280.609 Water distribution systems. spouts, and similar devices shall be (a) Water supply—(1) Supply piping. spaced at least 1 inch above the flood Piping systems shall be sized to pro- level of the fixture. vide an adequate quantity of water to (4) Appliance connections. Water sup- each plumbing fixture at a flow rate plies connected to clothes washing or sufficient to keep the fixture in a clean dishwashing machines shall be pro- and sanitary condition without any tected by an approved or listed fixed danger of backflow or siphonage. (See air gap provided within the appliance table in § 3280.609(f)(1)). The manufac- by the manufacturer. turer shall include in his written in- (5) Flushometer valves or manually op- stallation instructions that the manu- erated flush valves. An approved or list- factured home has been designed for an ed vacuum breaker shall be installed inlet water pressure of 80 psi, and a and maintained in the water supply statement that when the manufactured line on the discharge side of a water home is to be installed in areas where closet flushometer valve or manually the water pressure exceeds 80 psi, a operated flush valve. Vacuum breakers pressure reducing valve should be in- shall have a minimum clearance of 6 stalled. inches above the flood level of the fix- (2) Hot water supply. Each manufac- ture to the critical level mark unless tured home equipped with a kitchen otherwise permitted in their approval. sink, and bathtub and/or shower shall (6) Flush tanks. Water closet flush be provided with a hot water supply tanks shall be equipped with an ap- system including a listed water heater. proved or listed anti-siphon ball cock (b) Water outlets and supply connec- which shall be installed and main- tions—(1) Water connection. Each manu- tained with its outlet or critical level factured home with a water distribu- mark not less than 1 inch above the tion system shall be equipped with a 3⁄4 full opening of the overflow pipe. inch threaded inlet connection. This (7) Hose bibbs. When provided, all ex- connection shall be tagged or marked terior hose bibbs and laundry sink hose

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