Section 93 in The Punjab Capital (Development and Regulation) Building Rules, 1952
93. Construction of drains.
- Every drain constructed in connection with a building shall comply with the following requirements :-(i)[ Materials. - It shall be constructed of good sound pipes of suitable material conforming to relevant ISI specification. [Substituted by Chandigarh Administration Gazzette dated 22.1.1993.](ii)Size, fall and line of drain. - Every drain shall :-(a)be of a suitable size, and if it is intended for the conveyance of foul water shall have an internal diameter of not less than 10 cms.(b)be laid with a suitable fall and where practicable in a direct line. The standard gradient shall be 1 in 40 for a 10 cms. drain and 1 in 80 for a 15 cms. drain. The maximum and minimum gradients shall respectively be 1 in 20 and 1 in 80 for a 10 cms. drain and 1 in 40 and 1 in 140 respectively for a 15 cms. drain.(iii)Joints. - Every point in such drain shall be made in the manner and with suitable jointing materials prescribed in part IX on plumbing services of National Building Code of India.(iv)Drain to be laid on concrete. - Every such drain, laid on or in the ground and if constructed of material other than cast iron, shall be laid on a bed of concrete at least 7.5 cms. thick.]Concrete to be filled in. - Concrete shall be filled in so that it shall extend to the full length of the concrete bed prescribed in clause (iv) and shall be haunched up to not less than half the external diameter of the pipe.(vi)Junctions. - Every branch drain shall join any other drain obliquely in the direction of the flow of that drain and as near as practicable to the invert thereof.(vii)Drains within or under buildings. - A sewage drain shall not be constructed so as to be within or under any building, except in a case where any other situation is impracticable.Where any such drain or part thereof is constructed within or under a building, such drain or such part thereof shall :-(a)be laid or fixed in a direct line, where it be practicable and provided with adequate means of access;(b)[ be constructed of cast iron pipes, completely embedded in and covered with 1 :3 : 6 cement concrete 15 cms. thick all round.] [Substituted by Chandigarh Administration Gazzette dated 22.1.1993.](viii)Protection to drains beneath walls. - Where any drain is laid under a wall, it shall be protected at the part under the wall by means of a relieving arch, flag stone, iron or any other support which shall not bear on the drain, and shall be of sufficient size and strength to prevent any disturbances or other injury to such drain.(ix)Inlets to drains within buildings. - A drain shall not be constructed in such a manner that there shall be within a building any inlet to such drain except such inlet as may be necessary from any sanitary fitting or any sanitary installation connected directly to such drain.(x)[ Inlets to drains to be trapped. - Every inlet other than a ventilating pipe to such drain shall be property tapped by a suitable and efficient trap and such trap shall be formed and fixed so as to be capable of maintaining a minimum water seal of 5 cms.] [Substituted by Chandigarh Administration Gazzette dated 22.1.1993.](xi)[ Gully Traps. - Every trapped gully shall be covered with a grating the bars of which shall be not more than 10 mm. Every such gully if of stoneware shall be placed on a bed of concrete at least 10 cms. thick. Such gully trap shall be so set that the water depth therein is atleast 30 cms.] [Substituted by Chandigarh Administration Gazzette dated 22.1.1993.](xii)Trapping of drains from sewer. - A suitable and efficient intercepting trap, with a water seal of at least 4 inches, at a point as distant as may be practicable from the building and as near as may be practicable to the point at which the drain may be connected with the sewer, shall be provided to such a drain before connecting it with the sewer. Such a trap shall be provided with a raking or cleaning arm fitted with a secure and suitable stopper as a means of access to the drain between such trap and sewer, and shall be located within a manhole.(xiii)[ Drains to be water-tight. - Such a drain shall be constructed so as to be water tight and to be capable of resisting a pressure of atleast 1.5 m. head of water.] [Substituted by Chandigarh Administration Gazzette dated 22.1.1993.](xiv)Means of access to drains. - Such a drain shall be provided with adequate means of acces sand every means of access shall be :-(a)constructed so as to be water tight;(b)fitted with a suitable cover at the level of adjoining ground surface;(c)if placed within a building, fitted with an air-tight manhole cover;(xv)Drain connection for industrial and Chemical or other trade effluent - Every drain and private sewer intended solely for conveyance of industrial or chemical or other trade effluent shall be constructed of good sound pipes of material unaffected by the chemical action of the effluent and shall be laid as described heretofore.
