Section 13(ii) in The Coimbatore City Municipal Corporation Water Supply By-Laws, 1990
(ii)The diameter and character of the service connection, pipes and the number, size and kind of stop-cocks or taps shall in each case can be determined by the Commissioner of the Corporation having regard to the pressure available at the point of off-take in the main, distance of premises to be served from the main and any other relevant facts. In every case, the diameter of the bore in water-plain shall be quarter inch (¼) less than that of the service pipe except that in the case of half-an-inch (½) service pipe the diameter of the bore shall be 3/8. All the taps in house service shall be of the screw down-type or other approved by the Municipal Corporation Engineer and their size shall not in any case exceed (half-an-inch) (½).
