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  1. #1
    Join Date
    May 2009
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    New Jersey
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    87

    Default Kitchen drain question

    Does this kitchen drain look like it is correctly installed?

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  2. #2
    Join Date
    Mar 2007
    Location
    Santa Rosa, CA
    Posts
    2,818

    Default Re: Kitchen drain question

    Quote Originally Posted by Richard Roshak View Post
    Does this kitchen drain look like it is correctly installed?
    Richard,

    I'm not feeling well and may not get everything.

    It certainly would be better if the trap arm didn't take all of those turns, but I'm not sure it's wrong.

    Trap seal depth is 2"-4". Sure looks like that trap seal exceeds 4"
    Doesn't look like there is an airgap on the dishwasher drain
    You will need to look up the maximum trap arm length in your code book, but that part looks ok to me. IRC and UPC are different and I don't know which code you are on or what diameter the trap arm is.

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  3. #3
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    27,159

    Default Re: Kitchen drain question

    This might be an easy fix for the trap seal depth: cut off the unwanted and excess tailpiece lengths and move the trap as high as the fittings allow.

    Kitchen traps will be, should be, minimum 1-1/2", and that trap does not look like 1-1/4" (which is used for lavatory traps), so the P-trap itself is likely 1-1/2", with the PVC going into the wall likely 1-1/2" (but could be 2").

    No high loop for the dishwasher drain hose (some places allow the high loop; others require an air gap; many modern dishwasher come with a high loop already attached to the cabinet (don't need a second high loop); and, depending on the wording of a code which requires an air gap and also refers to manufacturer's installation instructions (as most code do) ... the wording for the air gap may be offset simply by following manufacturer's installation instructions if there is already a high loop attached to the dishwasher. (Just trying to cover some of the various possibilities one may find.)

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  4. #4
    Join Date
    Sep 2017
    Location
    WV
    Posts
    22

    Default Re: Kitchen drain question

    It is not the best looking job , but as a plumber it is correct as long as the dishwasher hose is routed correctly , or there is an airgap on top of the sink. I would have cut the dishwasher tail piece shorter and until it brought the trap up to eliminate the tail piece ahead of the trap arm. The dishwasher drain may be airgapped by a high loop over the top of the machine if designed for it.


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