High Loop Drain that Goes Below Trap

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by BryceinSLC, Jan 1, 2021.

  1. BryceinSLC

    BryceinSLC New Member

    Joined:
    Jan 1, 2021
    Location:
    Utah
    Hello All... First post of this forum, here we go!

    My dishwasher's drain line has a high loop...
    but..
    after the loop it goes down to below the sink trap and back up to the disposal.
    (actually its goes slightly above the disposal, then back down to the disposal, so 2 high loops?)
    Is this ok?
    I noticed water in the drain line today where it goes below the trap.
    Beside a little smell when doing the dishes I don't have issue with water backing up.

    If this is not ok, what should I do with all the extra drain hose?

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    Attached Files:

  2. breplum

    breplum Member

    Joined:
    Oct 2, 2004
    Occupation:
    Plumbing and heating contractor
    Location:
    San Francisco Bay Area
    From a single high loop, it should be gravity down into the disposal drain branch.
    Often you can stuff the excess drain back into the DW cabinet.
     
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  4. BryceinSLC

    BryceinSLC New Member

    Joined:
    Jan 1, 2021
    Location:
    Utah
    If I shove the extra line back in the DW cabinet it gets bunched up at the top creating extra loops.
    It's not a clean path from DW to disposal. Is this ok?
     
  5. kreemoweet

    kreemoweet In the Trades

    Joined:
    Sep 7, 2009
    Location:
    Seattle. WA
    Well, no, but there's not much else you can do other than abandoning the manufacturer-supplied drain hose. They make them about 3 times as long as
    needed in most cases, and the hoses really aren't capable of being shortened. So you end up with long lengths of drain hose collecting dishwasher
    gunk, no matter where you put it. You could probably find some suitable hose elsewhere that would fit both the dishwasher pump outlet and the disposer inlet, and make a
    custom length to suit YOUR layout.
     
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