Section 33(2) in New Town Kolkata Planning Area (Building) Rules, 2014
(2)Plumbing Services :-(a)only the domestic water from Bath, Water Closet and Kitchen shall be led to the community sewerage system wherever applicable;(b)rain and storm water from roof - top and Yard washing shall be connected to the drainage system or waste water recycling system or water harvesting system where provided;(c)the house connection pipes projecting from adjoining sewer manhole are the properties of the Sanctioning Authority wherever applicable and shall not be interfered with or connected to the internal sewerage line of the plot without the written permission of the Sanctioning Authority;(d)the internal sewer system shall be connected to the house connection pipe of the main sewer line only through a master trap of approved design and quality;
