Toilets shall not be placed in an unventilated room or compartment. In every case the compartment shall be open to the outer air or ventilated by means of a shaft, air duct or air vent located in the ceiling or a side wall at a point not lower than eighteen inches from the ceiling. Such shaft, air duct or air vent shall have a minimum area of 144 square inches, except that where a power driven fan is used such shaft, air duct or air vent shall have a minimum area of 40 square inches.
All toilets above the basement floor shall be fastened with a brass closet flange, soldered to the lead bend. Lead bends or straight lead wastes shall have a wiped solder joint on a heavy brass ferrule, caulked into the ductile iron hub of the fitting. Ductile iron bends may be used in a basement floor or cellar floor, and, in that event, a ductile iron toilet flange with extra heavy closet bolts shall be used. Toilets shall be set in a setting compound specifically manufactured for that purpose. Cement, plaster or putty shall be prohibited. On copper soil and waste lines, a brass toilet flange specifically manufactured for such purpose shall be used.
Copper waste, soil and vent line may be used above the cellar floor, provided that all fittings are of the drainage recessed type and changes in direction are in accordance with § 228-6.
Full-sized cleanouts shall be provided at the base of all stacks and at the end of all horizontal runs and shall be accessible at all times for cleaning purposes. Intermediate cleanouts shall be placed on all horizontal runs at fifty-foot intervals.
Bell traps are prohibited. All refrigerators, ice boxes, bars, soda fountain sinks, air conditioning wastes and water softener wastes shall be connected with the drainage system by indirect waste with a water cleansing outlet for cleaning purposes.