Section 272(2) in The Calcutta Municipal Corporation Act, 1980
(2)unfiltered water may also be used, free of charge,-(a)for flushing privies and urinals in private premises connected with sewers;(b)for flushing of drains in private premises;[* * * * * * * *] [Clause (c) omitted by W.B. Act 6 of 1993.]