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    curious 49's Avatar
    curious 49 Posts: 1, Reputation: 1
    New Member

    Nov 12, 2018, 04:10 PM
    Tie 1 1/2 abs to 3 in stack
    Can you route a 1 1/2 lav drain down vertically to the floor joist level to the soil stack
    massplumber2008's Avatar
    massplumber2008 Posts: 12,776, Reputation: 1210
    Senior Plumbing Expert

    Nov 12, 2018, 07:09 PM
    Hi Curious49

    The answer to your question depends on the number of plumbing fixtures connected to that 3" soil stack, on how many different floors of plumbing are involved with the 3" stack, and on what state you live in, amongst quite a few other things!

    Give us some more information, OK? The more information you provide, the better we can help...

    Thanks... Mark

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