(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 5 of 5

Thread: New Plumbing for Front Load Washer

  1. #1

    Default New Plumbing for Front Load Washer

    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. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default washer

    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.

  3. #3
    Plumber jimbo's Avatar
    Join Date
    Aug 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!

  4. #4


    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).


  5. #5
    Master Plumber Redwood's Avatar
    Join Date
    Dec 2007


    It should also be 2" under most codes and pitch at 1/4" per foot minimum.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts