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Thread: Drain Volume

  1. #1
    In the Trades Hammy's Avatar
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    Dec 2011
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    Middle TN
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    Default Drain Volume

    We are installing body sprays in a shower and I am concerned about the drain capacity. The shower control valve can supply 9 gpm @ 90 psi. The city reports the supply is normally at 65 to 80 psi static pressure. Drain is a 2" pvc line assuming properly installed.

    Hammy

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Sep 2004
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    New England
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    Default

    One drain at 2" should be able to handle it - just don't stand on the drain cover for long! My tub drain is 1.5", and on full-blast, the tub drains faster than the incoming water...a 2" drain is a lot bigger in area/volume. If you're really worried, they do make 3" drains, or you could put two 2" ones in or a linear drain, but ensure the underneath plumbing is big enough, otherwise, it won't make any difference.
    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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