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Thread: washer & sink hookup...

  1. #1
    DIY Junior Member phantomvs's Avatar
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    Default washer & sink hookup...

    Ok so here is the story, the wife wanted a sink next to the washer.

    So i did a rough-in and she ran the washer and once i got a little water backup (about 1 cup) into the sink drain.

    Is this done correctly or what would you guys change?

    I know it should be a 2'' abs tube but its a 1 1/2'' and everything was fine till i added sink.

    I am thinking its because the drain for the sink is below the washer , but the reason i did it that way is cause if not the drain would be too high (18'' +) for the sink.

    Any ideas ?

    BTW where you see the orange wire it leads to a AAV and main drain is coming from the right side.

    Thanks in advance !! Name:  wdrain.jpg
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  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    If the connection to the sink was a wye rather than a sanitary T, it might work better. Or, maybe a double-wye to keep the overall length down. Wait for a pro to comment, as I probably am missing something...
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    DIY Junior Member phantomvs's Avatar
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    You see my main problem is that i need to keep the height down.

    If i put the sink above washer it will be too high. How can i have both on the main branch without raising sink level.

  4. #4
    Forum Admin, Expert Plumber Terry's Avatar
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    Instead of trying to wet vent a washer over a sink, (which would never be allowed in any plumbing code, even if it had been run in 2")
    Cut in a wye for the washer to the right, go up to a "Santee" for the trap arm.
    For the sink, continue on from the wye horizontal and use a combo fitting for the vent on the trap arm. Now the two vents, the washer vent and the sink vent can tie together at 42" above the floor.

    Running a washer past a sink drain is a problem.

    Wet venting can only be done on bathroom groups.

    Wet venting requires 2" or larger piping.

    A wye fitting on the vertical on a trap arm, is an "S" vent. It will siphon the trap. A Santee should be on the vertical for a traparm.
    Last edited by Terry; 09-11-2012 at 09:52 AM.

  5. #5
    DIY Junior Member phantomvs's Avatar
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    Thanks Terry for the help.

    Just 1 question, when you say the washer and sink vent can tie together do you mean i use only 1 vent (AAV) or tie together with no vent or double vent ?

    Thanks !

    Matt

  6. #6
    Forum Admin, Expert Plumber Terry's Avatar
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    A vent is always required.
    You can tie vents together and use one AAV as long as you have an atmospheric vent somewhere on the system.

  7. #7
    DIY Junior Member phantomvs's Avatar
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    Thank You Terry !!

  8. #8

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    x2 Terry..one point though. our plumbing code does allow wet venting of fixtures other than bathroom group.... but one should always acknowledge proper plumbing practices.

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