Re: Cutting concrete for drain
Posted by Gary Swart on July 18, 2004 at 17:24:47:
In response to Re: Cutting concrete for drain
I'm not too clear on just your question, but if you mean how do you connect the new drain with the existing, it done would be with fittings called no-hub. The 5-3/4" slope over 23 feet is exactly 1/4" per foot, so that will be OK. I'm not a plumber, so I'm not sure what size drain you should use for that new section. I think, underline "think" 2" would be sufficient for a sink. Pehaps even 1-1/2", but do check that with code before proceeding. 3" of concrete over the top is plenty since it will not be subject to any serious weight, and if you saw the trench, that will result in a narrower width to cover than if you break it out.

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