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Thread: Shower trap riser tilted due to 1/4" per foot drain slope

  1. #1
    DIY Junior Member SAVROOM's Avatar
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    Default Shower trap riser tilted due to 1/4" per foot drain slope

    If the drain line is sloped 1/4" per foot, then wouldn't that force the trap riser to be tilted from vertical, and therefore cause the clamping drain to be out of level with the floor? There must be a simple solution...what am I missing? Are traps designed to slightly more than 90 degrees to compensate? If not, then how do you achieve a 1/4" per foot drain line slope and also have a clamping drain that is level with the floor?

    thx

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    Forum Admin, Expert Plumber Terry's Avatar
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    Fittings are designed with the angle built in.
    It's never an issue.
    Last edited by Terry; 12-07-2013 at 10:10 AM.

  3. #3
    DIY Junior Member SAVROOM's Avatar
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    Is the trap designed with a built-in correction?

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    Moderator & Master Plumber hj's Avatar
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    It would only be a problem with screwed connections and they do have the pitch taken care of. PVC and ABS joints are "flexible" when first assembled, so there is a fair amount of "give" to make the riser vertical, with almost ANY reasonable slope, not just 1/4" per foor.
    Licensed residential and commercial plumber

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