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

    Jun 9, 2009, 03:50 AM
    Dishwasher drain
    How is a dishwasher supposed to be vented according to the general plumbing code
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Jun 9, 2009, 04:00 AM
    Hi Jackkann...

    A dishwasher is not usually vented separately. It usually connects into the drain from a kitchen sink and the drain from the kitchen sink is vented.

    If you install an individual ptrap for a dishwasher then that would need to be vented or connected to a vent just like any other fixture with a trap.

    Hope that helps...

    MARK
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #3

    Jun 9, 2009, 04:29 AM
    Quote Originally Posted by jackkann View Post
    How is a dishwasher supposed to be vented according to the general plumbing code
    Marks answer's bang on. If a DW is connected to a kitchen sink through a disposal nor a branch tailpiece then it's vented and trapped by the sink.
    Anything else requires both a trap and a vent. Regards, Tom
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