Question about plumbing for basement sink

jbatsJanuary 19, 2007

We are starting our basement and for one area we want to add a bar. We really would like to have a sink but the person doing most of the work says we would have to have a drain in the concrete for this to work. I was under the impression that we would just work off the plumbing from the kitchen above. Can someone tell me which is correct?

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Thnik of gravity. Water only goes down. Unless your kitchen waste falls through piping which you can intercept at a point LOWER than the one you are planning for the basement, your friend is correct.

Do you have an ejector pump in your basement? If so, you might be able to run piping around the perimeter to meet up with it. That would save cutting your concrete floor. Ours runs on the peremiter walls. A diagram of our basement is posted at "My Page". Though it does not specifically indicate plumbing, I believe you can get the idea. Only need to drop 1/8" per foot of run, so you can carry the waste a long distance.

    Bookmark   January 19, 2007 at 7:22AM
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Code requires all pipes 3" or less in diameter to be run with a 1/4" per foot pitch.

Under some circumstances a 3" line may be run with a 1/8" per foot pitch with the expressed written consent of the inspecting authority.

Ref: International Residential Code 3005.3 & Uniform Plumbing Code 708.0

    Bookmark   January 24, 2007 at 12:36AM
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