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  1. #1
    Rick Healy's Avatar
    Rick Healy Guest

    Default Condensate line gurgling

    I inspected a furnace (Lennox Pulse 21). The condensate line is plumbed with 1/2" CPVC pipe. There is a standpipe made, and when the furnace is running, there is a gurgling sound coming from this pipe? Any thoughts on the cause, or problem?

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  2. #2
    David Bell's Avatar
    David Bell Guest

    Default Re: Condensate line gurgling

    No trap or dry trap. Pulse furnaces also tend to fill up with rust in the pvc vent pipe trap. IMHO one of the biggest pieces of crap ever put on the market.


  3. #3
    Join Date
    Mar 2007
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    Ormond Beach, Florida
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    Default Re: Condensate line gurgling

    Quote Originally Posted by David Bell View Post
    No trap or dry trap.
    Or insufficient trap seal depth for the static pressure in the unit?

    Quote Originally Posted by Rick Healy View Post
    The condensate line is plumbed with 1/2" CPVC pipe.

    I thought that 3/4" was the minimum pipe size for condensate lines? I know it is for evaporator coils, do those units allow for smaller condensate drain lines?

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

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