[Title 24 CFR 3280.607]
[Code of Federal Regulations (annual edition) - May 1, 2001 Edition]
[Title 24 - HOUSING AND URBAN DEVELOPMENT]
[Subtitle B - Regulations Relating to Housing and Urban Development]
[Chapter Xx - OFFICE OF ASSISTANT SECRETARY FOR HOUSING--FEDERAL HOUSING]
[Part 3280 - MANUFACTURED HOME CONSTRUCTION AND SAFETY STANDARDS]
[Subpart G - Plumbing Systems]
[Sec. 3280.607 - Plumbing fixtures.]
[From the U.S. Government Printing Office]


24HOUSING AND URBAN DEVELOPMENT52001-05-012001-05-01false3280.607Sec. 3280.607HOUSING AND URBAN DEVELOPMENTRegulations Relating to Housing and Urban DevelopmentOFFICE OF ASSISTANT SECRETARY FOR HOUSING--FEDERAL HOUSINGMANUFACTURED HOME CONSTRUCTION AND SAFETY STANDARDSPlumbing Systems
Sec. 3280.607  Plumbing fixtures.

    (a) General requirements--(1) Quality of fixtures. Plumbing fixtures 
shall have smooth impervious surfaces, be free from defects and 
concealed fouling surfaces, be capable of resisting road shock and 
vibration, and shall conform in quality and design to listed standards. 
Fixtures shall be permanently marked with the manufacturer's name or 
trademark.
    (2) Strainers. The waste outlet of all plumbing fixtures, other than 
toilets, shall be equipped with a drain fitting that will provide an 
adequate unobstructed waterway.
    (3) Fixture connections. Fixture tailpieces and continuous wastes in 
exposed or accessible locations shall be not less than No. 20 Brown and 
Sharpe gage seamless drawn-brass tubing or other approved pipe or tubing 
materials. Inaccessible fixture connections shall be constructed 
according to the requirements for drainage piping. Each fixture 
tailpiece, continuous waste, or waste and overflow shall be not less 
than 1\1/2\ inches for sinks of two or more compartments, dishwashers, 
clothes washing machines, laundry tubs, bath tubs, and not less than 
1\1/4\ inches for lavatories and single compartment sinks having a 2 
inch maximum drain opening.
    (4) Concealed connections. Concealed slip joint connections shall be 
provided

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with adequately sized unobstructed access panels and shall be accessible 
for inspection and repair.
    (5) Directional fitting. An approved or listed ``Y'' or other 
directional-type branch fitting shall be installed in every tailpiece or 
continuous waste that receives the discharge from food waste disposal 
units, dishwashing, or other force-discharge fixture or appliance. (See 
also Sec. 3280.607(b)(4)(ii).)
    (b) Fixtures. (1) Spacing. All plumbing fixtures shall be so 
installed with regard to spacing as to be reasonably accessible for 
their intended use.
    (2) Water closets. (i) Water closets shall be designed and 
manufactured according to approved or listed standards and shall be 
equipped with a water flushing device capable of adequately flushing and 
cleaning the bowl at each operation of the flushing mechanism.
    (ii) Water closet flushing devices shall be designed to replace the 
water seal in the bowl after each operation. Flush valves, flushometer 
valves, flushometer tanks and ballcocks shall operate automatically to 
shut off at the end of each flush or when the tank is filled to 
operating capacity.
    (iii) Flush tanks shall be fitted with an overflow pipe large enough 
to prevent flooding at the maximum flow rate of the ball cock. Overflow 
pipes shall discharge into the toilet, through the tank.
    (iv) Water closets that have fouling surfaces that are not 
thoroughly washed at each discharge shall be prohibited. Any water 
closet that might permit the contents of the bowl to be siphoned back 
into the water system shall be prohibited.
    (v) Floor connection. Water closets shall be securely bolted to an 
approved flange or other approved fitting which is secured to the floor 
by means of corrosion-resistant screws. The bolts shall be of solid 
brass or other corrosion-resistant material and shall be not less than 
one-fourth inch in diameter. A watertight seal shall be made between the 
water closet and flange or other approved fitting by use of a gasket or 
sealing compound.
    (3) Shower compartment. (i) Each compartment stall shall be provided 
with an approved watertight receptor with sides and back extending at 
least 1 inch above the finished dam or threshold. In no case shall the 
depth of a shower receptor be less than 2 inches or more than 9 inches 
measured from the top of the finished dam or threshold to the top of the 
drain. The wall area shall be constructed of smooth, noncorrosive, and 
nonabsorbent waterproof materials to a height not less than 6 feet above 
the bathroom floor level. Such walls shall form a watertight joint with 
each other and with the bathtub, receptor or shower floor. The floor of 
the compartment shall slope uniformly to the drain at not less than one-
fourth nor more than one-half inch per foot.
    (ii) The joint around the drain connection shall be made watertight 
by a flange, clamping ring, or other approved listed means.
    (iii) Shower doors and tub and shower enclosures shall be 
constructed so as to be waterproof and, if glazed, glazing shall comply 
with the standard for Safety Performance Specifications and Methods of 
Test for Safety Glazing Materials Used in Buildings, ANSI Z97.1-1984.
    (iv) Prefabricated plumbing fixtures shall be approved or listed.
    (4) Dishwashing machines. (i) A dishwashing machine shall not be 
directly connected to any waste piping, but shall discharge its waste 
through a fixed air gap installed above the machine, or through a high 
loop as specified by the dishwashing machine manufacturer, or into an 
open standpipe-receptor with a height greater than the washing 
compartment of the machine. When a standpipe is used, it shall be at 
least 18 inches but not more than 30 inches above the trap weir. The 
drain connections from the air gap or high loop may connect to an 
individual trap, to a directional fitting installed in the sink 
tailpiece or to an opening provided on the inlet side of a food waste 
disposal unit.
    (ii) Drain from a dishwashing machine shall not be connected to a 
sink tailpiece, continuous waste line, or trap on the discharge side of 
a food waste disposal unit.
    (5) Clothes washing machines. (i) Clothes washing machines shall 
drain either into a properly vented trap, into a laundry tub tailpiece 
with watertight

[[Page 157]]

connections, into an open standpipe receptor, or over the rim of a 
laundry tub.
    (ii) Standpipes shall be 1\1/2\ inches minimum nominal iron pipe 
size, 1\1/2\ inches diameter nominal brass tubing not less than No. 20 
Brown and Sharpe gage, or 1\1/2\ inches approved plastic materials. 
Receptors shall discharge into a vented trap or shall be connected to a 
laundry tub tailpiece by means of an approved or listed directional 
fitting. Each standpipe shall extend not less than 18 inches or more 
than 30 inches above its trap and shall terminate in an accessible 
location no lower than the top of clothes washing machine. A removable 
tightfitting cap or plug shall be installed on the standpipe when 
clothes washer is not provided.
    (iii) Clothes washing machine drain shall not be connected to the 
tailpiece, continuous waste, or trap of any sink or dishwashing machine.
    (c) Installation--(1) Access. Each plumbing fixture and standpipe 
receptor shall be located and installed in a manner to be accessible for 
usage, cleaning, repair and replacement. Access to diverter valves and 
other connections from the fixture hardware is not required.
    (2) Alignment. Fixtures shall be set level and in true alignment 
with adjacent walls. Where practical, piping from fixtures shall extend 
to nearest wall.
    (3) Brackets. Wall-hung fixtures shall be rigidly attached to walls 
by metal brackets or supports without any strain being transmitted to 
the piping connections. Flush tanks shall be securely fastened to 
toilets or to the wall with corrosive-resistant materials.
    (4) Tub supports. Bathtub rims at wall shall be supported on metal 
hangers or on end-grain wood blocking attached to the wall unless 
otherwise recommended by the manufacturer of the tub.
    (5) Fixture fittings. Faucets and diverters shall be installed so 
that the flow of hot water from the fittings corresponds to the left-
hand side of the fitting.
    (6) Whirlpool bathtub appliances--(i) Access panel. A door or panel 
of sufficient size shall be installed to provide access to the pump for 
repair and/or replacement.
    (ii) Piping drainage. The circulation pump shall be accessibly 
located above the crown weir of the trap. The pump drain line shall be 
properly sloped to drain the volute after fixture use.
    (iii) Piping. Whirlpool bathtub circulation piping shall be 
installed to be self-draining.
    (iv) Electrical. Refer to the National Electrical Code, NFPA 70-
1993, Article 685G.

[40 FR 58752, Dec. 18, 1975, as amended at 42 FR 961, Jan. 4, 1977. 
Redesignated at 44 FR 20679, Apr. 6, 1979, as amended at 52 FR 4586, 
Feb. 12, 1987; 58 FR 55014, Oct. 25, 1993]