Par. 1. - In every tenement house hereafter erected there shall be a separate water-closet in a separate compartment within each apartment of four or more rooms.

Where apartments consist of less than four rooms there shall be at least one water-closet for every three rooms, and on the same floor with said rooms. Every such water-closet shall be placed in a compartment completely separated from every other water-closet, and such compartment shall be not less than two feet and four inches wide, and shall be inclosed with plastered partitions, or some equally substantial material, which shall extend to the ceiling. Such compartment shall have a window, opening directly, or through a straight horizontal shaft of the same dimensions as the window and not more than four feet long, upon a street, a railroad right of way, cemetery or public park or a yard or alley or open passage-way not less than four feet wide, or upon a court vent or upon a covered passageway not more than twenty feet long and at least twenty feet wide, and twenty feet high. Every such window shall be at least one foot by three feet between stop beads; and the whole window shall be made so as to open readily. When, however, such water-closet compartment is located on the top floor and is lighted and ventilated by a skylight over it, no window shall be necessary, provided that the roof of such skylight contains at least three square feet of glazed surface and is arranged so as to open readily. Nothing in this section in regard to the separation of water-closet compartments from each other shall apply to a general toilet room containing several water-closets, hereafter placed in a tenement house, provided that such water-closets are supplemental to the water-closet accommodations required by law for the use of the tenants of the said house. Nothing in this section in regard to the ventilation of water-closet compartments shall apply to a water-closet hereafter placed in an existing tenement house, to replace a defective fixture in the same position and location. No water-closet shall be maintained in the cellar of any tenement house without a permit in writing from the board of health; and said board shall have power to make rules and regulations governing the maintenance of such closets. Every water-closet compartment in any tenement house shall be provided with proper means of lighting the same at night. If fixtures for gas or electricity are not provided in such compartment, then the door of such compartment shall be provided with translucent glass panels, or with a translucent glass transom, not less in area than four square feet. The floor of every such water-closet compartment shall be made waterproof with asphalt, tile, stone or some other waterproof material; and such water-proofing shall extend at least six inches above the floor on all sides of the compartment except at the door opening so that the floor can be washed or flushed without leaking. No drip trays shall be permitted. No water-closet fixtures shall be inclosed with any woodwork.