Need to replumb under sink for new disposal

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by rsmith99, Nov 2, 2012.

  1. rsmith99

    rsmith99 New Member

    Messages:
    109
    Location:
    Oklahoma
    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. Terry

    Terry Administrator Staff Member

    Messages:
    15,413
    Location:
    Bothell, Washington
    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. kreemoweet

    kreemoweet Member

    Messages:
    377
    Location:
    Seattle. WA
    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. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,237
    Location:
    Cave Creek, Arizona
    I have ONLY used the glued together drain fittings in VERY special circumstances. Otherwise everything is done with 1 1/2" tubular.
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