Horizontal Drainage Pipe - Required Slopes
Minimum pitch of horizontal 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