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    Hcindy82000's Avatar
    Hcindy82000 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Oct 18, 2016, 07:11 PM
    Island sink drain problem
    The island sink has a loop vent under the sink. I installed an AAV and that didn't help. I snaked the drain from under the sink as well as from the cleanout under the house. The laundry tray and washer which are hooked to the same drain under the house drain fine. I'm stumped, I have been plumbing for 45 years and can't figure this out. HELP!
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Oct 18, 2016, 07:24 PM
    Hi Hcindy

    Did you snake down both the drain and the vent of the island sink drain? I'd start there... you'd amazed at how many homes used the vent as the drain in these cases! Post back...

    Mark
    Hcindy82000's Avatar
    Hcindy82000 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Oct 18, 2016, 08:59 PM
    Thanks Mark, but I added an AAV vent and it didn't help.
    Quote Originally Posted by massplumber2008 View Post
    Hi Hcindy

    Did you snake down both the drain and the vent of the island sink drain? I'd start there... you'd amazed at how many homes used the vent as the drain in these cases! Post back...

    Mark
    Thanks but I added an AAV vent and it didn't help.
    Quote Originally Posted by Hcindy82000 View Post
    Thanks Mark, but I added an AAV vent and it didn't help.
    Mike45plus's Avatar
    Mike45plus Posts: 230, Reputation: 27
    Full Member
    		  
    #4

    Oct 19, 2016, 02:48 AM
    Cindy,
    Try removing the AAV and see if the sink drains with an open vent...
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #5

    Oct 22, 2016, 11:29 AM
    AAV is not necessary since you have "Loop Vent". Also, make sure the sink drain is connected to the DRAIN side of the loop vent - not to the VENT side.

    If connected correctly - than check the drain pipe for proper slope

    Back to you

    Milo
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