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Thread: Basement bath/laundry

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  1. #1
    DIY Member Kestrel's Avatar
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    Default Basement bath/laundry

    Hello again wise plumbers...

    As I've posted recently, I'm in the starting stages of a basement remodel, to include a new bathroom. To do so requires an ejector, and some other concrete cracking/excavation - for the toilet and shower, at least.

    In an effort to minimize the concrete work, the following struck me: Can I have a shower and laundry next to each other; the shower with a 2" trap, and its own vent in the wall bounding the shower, and the laundry with a 2" standpipe and trap, and its own vent, with the drainage of the laundry then flowing via a santee into the vent pipe of the shower?

    Like this:
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  2. #2
    In the Trades Tom Sawyer's Avatar
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    No you can not.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  3. #3
    DIY Member Kestrel's Avatar
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    Drat.

    Is that because the laundry hook-up makes the shower a wet vent?

  4. #4
    DIY Member Kestrel's Avatar
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    Would this work?
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  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    It's not technically a wet vent (as I understand it), that's where multiple fixtures are attached to the same drain line that may only have one vent. On your proposed situation, the only vent is being asked to be a drain...not the same thing. Once a vent becomes a vent, it must always remain a vent - you can't use it as a drain.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  6. #6
    DIY Senior Member dlarrivee's Avatar
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    You've already made it easy by deciding to have the laundry close to the bathroom, now don't make it hard by trying to use a vent as a drain.

    You're going to have to remove concrete no matter what, why not do it all once and do it right?

  7. #7
    In the Trades Tom Sawyer's Avatar
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    Your 2nd drawing will work and meet code.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

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