Section 60(5) in Faridabad Complex Administration Building Rules, 1989
(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.
