Section 94 in The Punjab Capital (Development and Regulation) Building Rules, 1952
94. Ventilation of drains.
- The drains intended for conveying foul matter from a building to a sewer through an intercepting trap shall be provided with two ventilating pipes, one connected to the drain at a point as near as practicable to and on the inlet side of the intercepting trap, and the other at a point as distant as practicable from the intercepting trap.Every such ventilation pipe shall -(i)be furnished at the foot thereof with a suitable air-tight access cap or cover;(ii)have an internal diameter of not less than two inches; and(iii)be otherwise constructed in the same manner and of the same material and weight as if such pipe were a soil pipe.The soil pipe or waste pipe or ventilating pipe of any sanitary installation where such pipe is connected direct to such drain and where the situation and diameter are in accordance with the requirements applicable to the pipe to be carried up from the drain, shall be deemed to provide the necessary means of ventilation.The open end of every ventilating pipe or other pipe providing the necessary means of ventilation shall be fitted with a suitable grating or other cover having apertures of aggregate area not less than the sectional area of the pipe.Materials, accessibility and protection
