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Thread: type of p-trap for tub drain

  1. #1
    DIY Junior Member Brian Guinness's Avatar
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    Default type of p-trap for tub drain

    Hi all,
    (apologies if this has been asked an answered, but i searched quite a bit)

    I'm in the midst of a bathroom remodel and am working on replacing the tub. I removed the old tub and the brass drain assembly, which connected to 1 1/2" PVC. I'm looking to put in an all-PVC drain assembly. Because of the way the drain pipe is angled, a p-trap with union joint (and union nut) is dry fitting much better than a p-trap that uses PVC cement to connect the two pieces - which was my first preference as I was more confident that it would never leak. But this cemented p-trap assembles top-to-bottom almost 1" higher and really throws everything off when connected to the drain pipe.

    So... is it OK and proper to use a p-trap with a union joint for a tub drain that i will have almost no access to once i drop the tub in? I'm a bit worried about the possibility of a leak, but am hoping that's just paranoia

    thanks!
    Brian

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Plumbing inspectors like to see a solvent weld p-trap.

    In forty years, I've never installed a p-trap for a tub or shower that had a union.

  3. #3
    DIY Junior Member Brian Guinness's Avatar
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    Thank you, Terry, for the quick reply. It is what I expected. Now I just need to figure out how to get a solvent weld p-trap to fit!

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