Section 104(7) in The Punjab Scheduled Roads and Controlled Areas Restriction of Unregulated Development Rules, 1965
(7)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 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.
