Re: Correct Slope for 4 inch drain pipe
Posted by Mark Winslow on December 17, 19100 at 05:26:37:
In response to Re: Correct Slope for 4 inch drain pipe
The proper slope for drain and waste piping is 1/4" per foot. At this rate the water has sufficient scouring capability to help keep the drain lines clear. Piping 4" and above can be sloped at 1/8" if you don't have sufficient depth to run 1/4". Avoid putting too much slope on the piping if you have a lot of turns as the water will tend to run away from solids.


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