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Cleanouts in Draining Systems

Cleanouts provides access to the sewer for rodding

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Drain cleanouts provide access to the sewer for cleaning without disassembling appliances like toilets or pipes.

Sewer - cleanouts drain

Sewers in modern plastic materials, properly designed and installed, should require minimal or no maintenance.

  • cleanouts are required at base of stacks and at each horizontal change of 45o or more
  • if more than 1 change in direction in a run of a pipe, only 1 cleanout every 40 ft (12 m) is required
  • cleanouts should be installed every 75 - 100 ft (25 - 30 m)

Cleanouts size and clearance distance in front of the cleanout can be taken from the table below:

Pipe Size
(in)
Cleanout Size
(in)
Clearance
(in)
1 /1/2 1 1/2 12
2 1 1/2 12
2 1/2 2 1/2 12
3 2 1/2 18
4 or larger 3 1/2 18
  • 1 inch = 25.4 mm
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