New Plumbing for Front Load Washer

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by dsneuf, Apr 8, 2009.

  1. dsneuf

    dsneuf New Member

    Apr 8, 2009
    I am installing a new front load washer in a converted bathroom to laundry room. Location is on the first floor above the garage. I am planning on installing a floor drain and watts auto shutoff valve.

    My question is related to the dwv (2") plumbing inside the wall connected to the wall box.

    1) Is there a minimum height (or range of heights) to the top of the stack/drain pipe into the wall box? I'd like to place the box around 30" from the floor due to a window location.

    2) Is a separate trap required inside the wall?

    3) If so, are there height limits/range for its placement.

    Thanks in advance!

    ~ Scott
    Cincinnati, OH
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    The top of the standpipe has to be higher than the water's level inside the machine when it is set for the maximum load. EVERY drain needs a trap whether it is inside the wall or outside, but you can only have ONE trap on the drain line.
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  4. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego
    Under CA code ( UPC ) the top of the standpipe must be 18" minimum, 30" maximum above the floor. Absolutely must a trap on the standpipd...but only one!
  5. dsneuf

    dsneuf New Member

    Apr 8, 2009
    Thanks for the quick answers.

    For clarify, I need a trap for the washer drain/stack, but it should not connect into another trap (i.e. the piping after the trap must be tied in directly to the main).

  6. Redwood

    Redwood Master Plumber

    Dec 15, 2007
    Service Plumber
    It should also be 2" under most codes and pitch at 1/4" per foot minimum.
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