Part 19 (1/2)

The branch vent shall not be less than the following sizes:

1-1/4 inches in diameter for 1-1/4 inch trap.

1-1/2 inches in diameter for 1-1/2 inch to 2-1/2 inch trap.

2 inches in diameter for 3 inch to 4 inch trap.

One-half their diameter, for traps 3 inches and over.

Where two or more closets are placed side by side, on a horizontal branch, the branch line shall have a relief extended as a loop. A pipe 2 inches in diameter shall be sufficient as a loop vent for two closets. A pipe 3 inches in diameter shall be sufficient as a relief for three or four closets; and where more than four closets are located on the same branch the relief shall not be less than 4 inches in diameter. All house drains and soil lines on which a water closet is located must have a 4-inch main vent line. Where an additional closet is located in the cellar or bas.e.m.e.nt, and within 10 feet of main soil or vent line, no relief vent will be required for said closet; but where it is more than 10 feet, a 2-inch vent line will be required. Relief vent pipes for water closets must not be less than 2 inches in diameter, for a length of 40 feet, and not less than 3 inches in diameter, for more than 40 feet.

No re-vent from traps under bell traps will be required.

In any building having a sewer connection with a private or public sewer used for bell-trap connections or floor drainage only, a 2-inch relief line must be extended to the roof of the building from rear end of main. House drains, constructed for roof drainage only, will not require a relief vent.

A floor trap for a shower shall be vented, unless located in the cellar or ground floor the paving of which renders the trap inaccessible.

SEC. 30. HORIZONTAL VENT PIPES.--Where rows of fixtures are placed in a line, fitting of not less than 45 to the horizontal must be used on vent lines to prevent filling with rust or condensation; except on brick or tile walls, where it is necessary to channel same for pipes, 90 fittings will be allowed. Trapped vent pipes are strictly prohibited. No vent pipe from the house side of any trap shall connect with the ventilation pipe or with sewer, soil or waste pipe.

SEC. 31. OFFSET ON VENT LINES.--All offsets on vent lines must be made at an angle of not less than 45 to the horizontal, and all lines must be connected at the bottom with a soil or waste pipe, or the drain, in such manner as to prevent the acc.u.mulation of rust, scale or condensation.

No sheet metal, brick, or other flue shall be used as a vent pipe.

SEC. 32. SETTING OF FIXTURES.--All fixtures must be set open and free from all enclosing woodwork. Water closets and urinals must not be connected directly or flushed from the water-supply pipes except when flushometer valves are used.

Each water closet must be flushed from a separate cistern, the water from which is used for no other purpose, or may be flushed through flushometer valves.

Rubber connection and elbows are not permitted.

Pan, plunger, or hopper closets will not be permitted in any building. No range closet either wet or dry, nor any evaporating system of closets shall be constructed or allowed inside of any building.