Section 42 in Punjab Urban Planning and Development Authority (Building) Rules, 1996
42. Waste water pipes.
[Section 180(2)(i)] - A waste water pipe from a bath, sink (not being a slope sink), bidet or lavatory basis and pipe for carrying water directly shall, -(i)not discharge as to cause dampness in the walls or the foundation of a building;(ii)if it discharge into a drain, be disconnected from the drain by a trapped gully with a suitable grating above the level of the water in the trap.
