Section 3A(3) in Tamil Nadu District Municipalities Building Rules, 1972
(3)Wherever existing water storage Sumps are available, the rainwater so collected, after it passes through the filter, shall be allowed to flow to the sump through closed pipes. An overflow pipe shall be provided to the storage sump so that the surplus water is led into the nearby open well or bore well or percolation pit.(C)Ordinary building (Ground + 2 floors and above). - (1) The specification detailed in item "B" above for ordinary building (Ground + First floor) is also applicable to building specified in this category.
