Section 97 in The Haryana New Mandi Townships Building Rules, 1967
97. Design and construction of subsoil irrigation work - [Section 4(2)(i) and (k)].
(1)Every person, who shall construct a subsoil irrigation work for the disposal of the effluent from a septic tank under land, shall cause the subsoil irrigation system thereof to be constructed of open joint earthen-ware pipes not less than 75 milimetres (2.9528') diameter and laid at suitable falls in parallel rows, under the whole area of the said land at intervals not exceeding 2 metres (6.5617 feet) and with a cover not exceeding one metre (3.2808'). He shall cause the pipes to be surrounded with a continuous envelope of clean broken brickbats passed through a mershed screen of 25 millimetres (0.9843 inches) sq. mesh not less than 15 centimetre (5.906 inches) thick all round the pipes.(2)He shall cause the junction points of the main feeders of the subsoil irrigation system to be provided with suitable manholes and fitted with suitable cast iron covers and frames.
