Precautions for Waste Water Appliances

Waste water

Waste water is spent water from baths, washbasins, sinks of kitchen and similar appliances.

Precautions while Executing Layout of Pipe

• Pipe work and appliances should be arranged in such a way that allows close grouping of connections with water closet near main soil pipe.
• The branch pipes should be kept short to reduce noise.
• When the basin and bath are at some distance from the stack, it would be cheaper and simpler to combine the waste pipes into one.
• Any bends in the waste pipe should be of large radius.
• The pipe work in branch connections should be arranged to allow free drainage for the system.
• All connections to main or branch pipes should be arranged in such a way that prevents cross flow from one appliance to another.
• Branch connections should be of large radius along the invert.
• The minimum diameter of soil and waste stacks should be 100 mm and 75 mm respectively.
• When the pipes are covered, hard to find along the internal face of the walls, they should be of cast iron.
• All pipes including those laid on external face of the wall should be of cast iron on the ground floor.
 
• Sufficient condition should be made to access all pipe works and embedding of joints in the walls should be avoided.
• All appliances connected directly to stack should be trapped.
• 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.