Re: proper slope for dwv in new construction
Posted by Ed on June 04, 2003 at 13:00:58:
In response to Re: proper slope for dwv in new construction
: Minimum 1/4" per foot for 3" and smaller.


May I add that one does not want to exceed a slope of 1/2" per foot on these same size pipes.
Otherwise, a situation could develop where the liquid waste flows past or first down the drain, potentially allowing the solid waste to get stuck and accumulate, eventually causing a blockage.

If you slope at 1/4" per foot the wastes will travel together and help to prevent drain blockages.

: : what is the recommended slope for drain line, main & branches




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