Archives: Library Snippets

  • Impervious Floors

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    (1) Every soil-water fitting and every bath shall be placed on an impervious floor. (2) Every shower-fitting shall be placed over a bath or over an impervious flor graded to a waste-water outlet connected through a trap fitted with a grating to the sewer.

  • Electrolytic Action

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    There shall be no connexion between metal pipes and cisterns or tanks of dissimilar metal where, in the opinion of the local authority, such association of dissimilar metals might set up electrolytic action.

  • Support Of Piping And Fittings

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    (1) Strap hangers may be used for all pipes of nominal bore up to 50 millimetres, but ring hangers shall be used for all pipes of greater size. (2) All pipes, except those laid in the ground, shall be securely fixed at frequent intervals to that portion of the wall or other rigid portion of…

  • Size, Fall, Line And Changes In Direction

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    (1) All sewers shall be of a size capable of tanking the discharge into them, calculated in accordance with the relevant provisions of this chapter, with a minimum internal diameter of 100 millimetres. (2) Sewers of 100-millimetre and 150-millimetre diameter shall be laid with gradients lying between a maximum of 1 in 10 and a…

  • Junctions To Sewers

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    (1) Every branch sewer shall join another sewer in the direction of the flow of such sewer at an included angle of 45 degrees and as near as practicable to the invert thereof. (2) All earthenware junctions shall be made by means of ordinary or channel junctions complying with the requirements of C.A.S. No. A16.

  • Joints In sewers

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    (1) All sewer-pipes shall be centred and joined concentrically with the invert on true line. (2) If sewers are constructed of cast-iron socketed pipes, the joint shall be secured to a depth of at least half the socket depth with molten lead, run in one pouring, or with lead wool, properly caulked. (3) If sewers…

  • Sewers On Bad Or Made-Up Ground

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    All sewers on bad or made-up ground or ground producing unequal bearing shall be laid in a manner in all respects satisfactory to the local authority, which shall take into consideration the nature of the ground and the properties of the pipes and joints being used.

  • Sewers Within Or Under Buildings

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    (1) No sewer or part thereof may be laid or may pass, as the case may be, within or under or through a building unless the local authority decides otherwise, having regard to considerations of health and maintenance or other matters relevant to the particular case. (2) Every sewer or part thereof, where it is…

  • Depth Of Cover To, And Protection Of Sewers

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    (1) All sewers, other than cast-iron sewers, having less than 300 millimetres clear cover over the socket of the pipe shall be adequately protected by encasing in concrete not less than 100 millimetres thick, having a composition not inferior to 50 kilograms of cement to 100 cubic decimetres of fine aggregate to 200 cubic decimetres…

  • Access To Sewers

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    (1) Means of access shall be provided in sewers at distances between every such means of access not exceeding 50 metres in the case of 100-millimetre-diameter sewers, and 80 metres in the case of 150 millimetre or large diameter sewers. (2) Access-eyes or rodding-ways for sewers shall have a minimum diameter of 100 millimetres. (3)…