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Thread: Need to replumb under sink for new disposal

  1. #1
    DIY Senior Member rsmith99's Avatar
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    Default Need to replumb under sink for new disposal

    I am replacing the disposal under my kitchen sink. The new disposal is a littl bigger than the old one and the pipes need to move a little.

    The existing drain pipes are 1 1/2" PVC. All glued together.

    When I was at the plumbing supply store buying new PVC fittings, a plumber suggested I replace all the 1 1/2" PVC with the smaller, thinner, slip joint fittings to make it easier next time.

    I like the idea of easier next time, but it seems it would be better for the sink and the disposal if I kept the drain diameter 1 1/2".

    Can I get some opinions on which way to go?

    Thanks!
    Ron

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Another plumber for the thinner PVC with slip joints. It makes it easy to take apart if you need to clean it out too.

  3. #3
    DIY Senior Member kreemoweet's Avatar
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    The thinner tubular drain pieces are not significantly smaller than PVC in the inside diameter. Unless you have some special need
    for the added sturdiness of Schedule 40 PVC, the 1 1/2 in. tubular is the way to go, the flimsier stuff is perfectly adequate
    for the job it needs to do, and much more convenient.

  4. #4
    Moderator & Master Plumber hj's Avatar
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    I have ONLY used the glued together drain fittings in VERY special circumstances. Otherwise everything is done with 1 1/2" tubular.
    Licensed residential and commercial plumber

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