Washing machine drain size

Discussion in 'UPC Plumbing Code Questions' started by JSS, Dec 5, 2020.

  1. JSS

    JSS New Member

    Dec 5, 2020
    West Virginia
    I have a 1.5" drain pipe for my washing machine that did not have a p trap. I went to add one and read that 2" is the standard now. It is going to be a big job to upgrade that and am wondering is it worth It? I also don't understand why 2" is required when the drain hose itself is much smaller.
  2. Reach4

    Reach4 Well-Known Member

    Sep 25, 2013
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