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Thread: Toilet plumbing

  1. #1
    DIY Junior Member MichaelNY's Avatar
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    Dec 2012
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    Default Toilet plumbing

    I have a section of soil stack in my basement running horizontally to an existing toilet in the basement (the horizontal is linked to a vertical stack from the second floor). I'm going to remove that basement toilet and use the soil stack connection for a new toilet I've installed on the first floor of the house. Question: the new toilet on the first floor is 8' above and 6' across from the soil stack connection in the basement. Is it better to have the new PVC waste pipe from upstairs go straight down first, and then slope to the existing connection, or better to have the pipe slope from the closet bend and then make a vertical drop right before the soil stack connection? Thanks for any advice.

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

    Don't think you'll want to run it straight down - if nothing else, it might get noisy dropping that far. They put a closet bend on the thing for a reason (a lot of that is to keep it in the floor between stories), but the velocity may play into it, too. Probably work, but might create other problems. See what the pros have to say on this...
    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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