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    cat00737326's Avatar
    cat00737326 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 4, 2011, 03:11 PM
    Fowl odor from wash machine drain
    Should I have a p trap on my washing machine drain
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Jun 4, 2011, 03:30 PM

    Hi Cat...

    If the drain connects to the main sewer drain line that goes to the city sewer or a septic/cesspool then yes, you absolutely MUST have a PTRAP on the drain line. If, however, the washer drain connects to the outside via a drywell or similar then no, you do not need a PTRAP although I would install one just to help keep any bugs out... ;)

    Your washer drain should also have a VENT associated with it... does yours?

    Back to you...

    Mark
    ohhshhht's Avatar
    ohhshhht Posts: 4, Reputation: 1
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    #3

    Jun 18, 2011, 06:18 PM
    Oh yeah the gas from your sewer system will rise up through the pipe and give a nasty smell through out your house. You definitely need a trap on any drain line and make sure water stays in the trap so the gas stays out of your living area.
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