Section 46(3) in Punjab Urban Planning and Development Building Rules, 2018
(3)Drain connection for trade effluent. - Every drain and private sewer intended solely for conveyance of industrial or chemical or other trade effluent shall be constructed of good and sound type of material unaffected by the chemical action of the effluent and shall be laid as provided in the Punjab Public Works Department Specifications or the National Building Code of India 2016 or in accordance with the instructions issued from time to time by the competent authority.
