proper pitch for drain pipe under floor?

Ruddydog52November 17, 2011

Hello, I will be installing a washer and dryer in my upstairs closet that backs up to a bathroom. I need to run the drainage pipe from the washer under the floor (7 feet) to the stack. I don't no the formula for figuring the right amount of pitch for the pipe per foot.

Does anyone know how I figure this out? Also I want to use those new flexible water lines instead of copper does anyone have any pro or cons on them? They would be a lot easier to snake through the walls.

Thanks for reading my post


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The washer drain must be 2" trade size minimum. Pitch for the "horizontal" portion is 1/4" per foot minimum. For 7', it is 1 3/4".

    Bookmark   November 17, 2011 at 8:36PM
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