Washing machine standpipe-- wye for drip drain line?

Discussion in 'Plumbing Code Questions' started by crunky, Jan 11, 2017.

  1. crunky

    crunky New Member

    Aug 16, 2015
    New York

    Cant find any code on this.

    Can you put a wye on a 2" washing machine standpipe [as shown in photo] for a drip drain line-- on the branch?

    it is a very tight a fit with the wm hose otherwise

    if ok, where does the standpipe height get measured from, the trap or the wye?


  2. Reach4

    Reach4 Well-Known Member

    Sep 25, 2013
    If you were to have the drip hose mounted 1 inch above the branch in your photo, I think you would be within code. That provide an "air gap". You could do that by extending the leg with a piece of PVC with a chunk out of the side, and a couple of holes for a nylon tie that would hold your tube. They want the water to go onto the floor if the drain overflows rather than being sucked into your softener. Getting sucked into the softener would not happen anyway, but that "air gap" is the rule.

    Note that for the 30 inch dimension below, many codes allow higher numbers.

  3. Sponsor

    Sponsor Paid Advertisement

  4. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona
    Some washer boxes have the Y preinstalled under TWO openings in the box. If you do your own, if the drip riser is high enough above the WM riser, it will create its own "air gap" because the water can never rise higher than the top of the wm standpipe.
  5. crunky

    crunky New Member

    Aug 16, 2015
    New York
    thanks for the replies/info
  6. Jsal13

    Jsal13 New Member

    Jan 16, 2017
    No ac condensation please. Lint and condensate will build up and it will need to be jetted to fix stoppage. It gets rock hard!
Similar Threads: Washing machine
Forum Title Date
Plumbing Code Questions Standpipe for utility room (not washing machine) Jan 6, 2018
Plumbing Code Questions Adding trap and vent to existing washing machine drain Dec 7, 2017
Plumbing Code Questions Moving washing machine Nov 15, 2017
Plumbing Code Questions Washing machine full overflowing. flood neighborhood. And trap weir at 20" with 8" stand p. Sep 9, 2017
Plumbing Code Questions Wondering why is no air gap required for a washing machine? Jun 5, 2015

Share This Page