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    jjonsqd13's Avatar
    jjonsqd13 Posts: 2, Reputation: 1
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    #1

    Dec 5, 2007, 07:59 PM
    Main drain degree of drop
    I'm finishing my basement and the main drain pipe is in a very bad spot. I'm going to re-run the main drain. How much of a drop should the pipe be? (Example: 1" every 10')
    doug238's Avatar
    doug238 Posts: 1,560, Reputation: 62
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    #2

    Dec 5, 2007, 08:56 PM
    2" pipe and under must have a minimum fall of 1/4" per foot equalling 1" every 4 feet and larger than 2" pipe must have a minimum of 1/8" per foot equalling 1" every 8 feet for residential drain and sewer piping.
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