Drainage Pipe Pitch

Minimum pitch of drainage pipes

Drainage piping and recommended minimum slope or pitch:

Pipe Diameter
(in)
Pitch
(in/ft)(m/m)Gradient
under 3 1/4 0.02 1:50
3 - 6 1/8 0.01 1:100
8 or larger 1/16 0.005 1:200
  • 1 in/ft = 0.083 m/m

Related Topics

  • Water Systems - Hot and cold water service systems - design properties, capacities, sizing and more

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