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Thread: All I can get is 1/8 slope on 2 inch shower drain - will this work?

  1. #1
    DIY Junior Member cbrown160's Avatar
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    Default All I can get is 1/8 slope on 2 inch shower drain - will this work?

    Hello all - first time poster - I'm in the middle of an ambitious bathroom remodel, including a curbless shower with linear drain (full kerdi shower), and i have a concern about my shower drain. I get good drop (just over 1/4inch per foot) for 2 feet coming out of the p trap, but then get 1/8th inch drop per foot for about 8 feet. Then I sweep in to another line with the right drop… This is all brand new 2" PVC, and I have a shower and two sinks on this line. I have this nagging fear that I'm going to finish this project, fire up the inaugural shower and flood the bathroom because it doesn't drain right… Should I be concerned?

    Thanks,
    Chris

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    Retired Defense Industry Engineer jadnashua's Avatar
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    Any time the slope flattens out, things slow down and become a location where stuff can collect. Not sure what an inspector would say, it will be interesting to see what the pros have to say. FWIW, larger pipe (4"+) can have a shallower slope in some situations.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    Forum Admin, Expert Plumber Terry's Avatar
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    You would normally drop 2" in eight feet.
    You have 1" drop now. It's pushing it. Most inspectors would turn that down.

    Will it work? In a way. I think the shower would tend to keep the line clear better than two lavs would.

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