Section 91 in West Bengal Municipal (Building) Rules, 2007
91. Plumbing services.
(1) The planning, design construction and installation of water supply, drainage and sanitation, and gas supply system shall be in accordance with the provisions of Water Supply, Drainage and Sanitation, Gas supply or Plumbing Services, of the latest edition of National Building Code of India. Septic tank, pits of pit privy shall be so located in a premises or holding, that the same is easily accessible from the means of access to the plot.(2)The underground reservoir shall be constructed in such a way that the manhole portion must be raised 300 mm. or more above ground level to avoid surface contamination. The inlet supply pipe shall always be kept above the higher level of the stored water surface.(3)The depth of the Underground Water Reservoir or Septic Tank or Inspection Pits or manholes shall not be more than the shallowest foundation depth and the minimum distance between edge of foundation and such underground structure shall not be less that 50% width of the underground structure.Note : All other services, which are not mentioned in this part shall conform to the provisions of the latest edition of National Budding Code of India.
