Pennsylvania Code
Title 34 - LABOR AND INDUSTRY
Part I - Department of Labor and Industry
Chapter 41 - SANITATION
Subchapter A - INDUSTRIAL SANITATION
WATER CLOSETS
Section 41.42 - Construction of water closets

(a) Water supply. No water closets, except those with flush meters, volumeters or similar devices, shall be supplied with water directly from the supply pipes.

(b) Traps. Earthenware traps shall have heavy brass or cast iron floor flanges soldered to the lead bends, or caulked to iron bends, or screwed to drainage screw pipe and bolted to the trap flange. The joint shall be made permanently secure and gastight.

(c) Tanks. Special tanks or cisterns for the supply of water to water closets shall hold not less than six gallons for each closet supplied, when full to the level of the overflow pipe. Automatic or siphon tanks shall hold not less than five gallons for each closet supplied. A group of closets may be flushed from one tank, but water closets on different floors shall not be flushed from the same tank, unless flush meters, volumeters, or similar devices are used; the water in the tanks shall not be used for any other purpose.

(d) Flushing apparatus. Water closets and other fixtures shall be provided with a sufficient supply of water for flushing purposes. Flush valves or similar devices on sanitary fixtures shall be provided with individual controlling stops, and the devices shall be constructed so that they close automatically when released. Water closet flush pipes shall be not less than 1-1/4 inches in diameter.

(e) Doors and fastening. Each water closet compartment shall have a door equipped with a latch, lock or bolt. Dwarf doors may be used, but the tops shall not be less than 60 inches from the floor, nor shall the clearance between the bottom of the door and the floor exceed 12 inches.