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  1. #1
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    Default AC CONDENSER DRAINING INTO SINK DRAIN

    GUYS---IS IT OK to have the ac units condenser pipe draining into bathroom sink drain pipe if there is a vent stack under that sink--never saw this before thanks cvf

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  2. #2
    Join Date
    Mar 2007
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    Default Re: AC CONDENSER DRAINING INTO SINK DRAIN

    Quote Originally Posted by CHARLIE VAN FLEET View Post
    GUYS---IS IT OK to have the ac units condenser pipe draining into bathroom sink drain pipe if there is a vent stack under that sink--never saw this before thanks cvf
    CVF,

    I'm not sure what you mean by a "vent stack under the sink". Are you referring to an AAV?

    Anyway, I believe you can drain condensate into a tailpiece, but before the trap. After the trap and you run the risk of sewer gases venting back into the HVAC system.

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  3. #3

    Default Re: AC CONDENSER DRAINING INTO SINK DRAIN

    There should be an air gap, usually we find these draining into the washer drain with an air gap

    Jeff Zehnder - Home Inspector, Raleigh, NC
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  4. #4
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    Mar 2007
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    Plano, Texas
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    185

    Default Re: AC CONDENSER DRAINING INTO SINK DRAIN

    Quote Originally Posted by Gunnar Alquist View Post
    CVF,

    I'm not sure what you mean by a "vent stack under the sink". Are you referring to an AAV?

    Anyway, I believe you can drain condensate into a tailpiece, but before the trap. After the trap and you run the risk of sewer gases venting back into the HVAC system.
    Gunnar has it!

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  5. #5
    Join Date
    Mar 2007
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    Fletcher, NC
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    Default Re: AC CONDENSER DRAINING INTO SINK DRAIN

    Quote Originally Posted by Gary Burnett View Post
    Gunnar has it!
    Which creates an air break (as shown in your photo) versus an air gap.

    Jerry Peck
    Construction/Litigation/Code Consultant - Retired
    www.AskCodeMan.com

  6. #6
    Join Date
    Oct 2010
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    Default Re: AC CONDENSER DRAINING INTO SINK DRAIN

    Appears to have jumped threads with my reply
    Here is the thread I jumped to not of my own accord.
    http://www.inspectionnews.net/home_i...blue-glue.html



    That appears to be a class of PVC or schedule 40 pipe (DWV)
    Hope it is schedule 40.
    No AVV.


    PVC Hot Blue LAVA Cement.

    Its wrong IMO.
    Attached thread explains.


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