Section 60 in Faridabad Complex Administration Building Rules, 1989
60.
(1)Every drain shall :-(a)be of suitable size, and if it is intended for the conveyance of foul water shall have an internal diameter of not less than 100 millimetre;(b)be laid with a suitable fall and where practicable in a direct line. The standard gradient shall be 1 in 40 for a 100 millimetre drain and 1 in 60 for 150 millimetre drain. The maximum and minimum gradient shall respectively be 1 in 20 and 1 in 80 for a 100 millimetre drain and 1 in 40 and 1 in 140 respectively for 150 millimetre drain.(2)(a)A drain shall not be constructed so as to within or under any building, except in a case where any other situation is impracticable.(b)Where a drain or part thereof is constructed within or under a building, such drain or such part thereof shall be laid or fixed in a direct line, where practicable and be provided with adequate means of access.(c)Such drains within the built area shall be either Hard Cast Iron pipes or shall be encased with 15 centimetres of cement concrete of M150 all round if any other pipe is used.(3)Where any drain is laid under a wall, it shall be protected at that part which is under the wall by means of a relieving arch, flange stone iron or any other support which shall not bear on the drain and shall be of sufficient size and strength to prevent any disturbance or other injury to such drain.(4)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.(5)Every inlet other than a ventilating pipe to such drain shall be properly trapped by suitable and efficient trap, and such trap shall be formed and fixed so as to be capable of maintaining a water seal of -(a)5 centimetre where such inlet has an internal diameter of less than 80 millimetres.(b)7.5 centimetre where such inlet has an internal diameter of more than 80 millimetre.(c)Every trapped gully shall be covered with a granting the bars of which shall be no more than 10 millimetre apart.
