Construction

Guidelines for Plumbing/Sewerage Pipe Works


Proper pipe work for sewerage and plumbing work ensures hygienic conditions in any building. All connections with main or branch pipes should be arranged in a way that can prevent cross flow from one appliance to another. Soil, waste and building sewer pipes should be of sufficient diameter in the direction of flow. Keep in following tips while designing and executing layout of sanitary pipes for the drainage of a building. 

  •  In sewer line minimum gradient should be 1 in 57 for 100 mm diameter pipe and 1 in 100 for 150 mm diameter.   
  • Pipe works and appliances should be arranged in a way that allows close grouping of connections with water closet near main soil pipe. 
  • Branch pipes should be kept short to reduce noise. 
  • When washbasin and bathroom are at some distance from stack, it may be cheaper and simpler to combine their waste pipe in to one pipe. 
  • Any bend in waste pipe should be of large radius. 
  • Pipe works in branch connections should be arranged to allow free drainage of system. 
  • Connections with main or branch pipes should be arranged in a way that can prevent cross flow from one appliance to another. 
  • Branch connections should be of large radius along the invert. 
  • Minimum diameter of soil and waste stacks should be 100 and 75 mm respectively. 
  • Covered pipes or hard to find pipes along internal face of walls should be of cast iron. 
  • On ground floor all pipes including those laid on external face of the wall should be of cast iron also. 
  • Sufficient condition should be made to access all pipe works.
  • Embedding of joints in walls should be avoided. 
  • All appliances connected to stack should be trapped directly. 
  • The soil, waste and building sewer pipes should not be reduced in diameter in the direction of flow. 
  • Cast iron fittings and branches for waste pipes should be of same quality.

 

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