Double vanity with single center drain?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by MartinM, Jul 14, 2007.

  1. MartinM

    MartinM New Member

    May 31, 2006
    Any major issues with using a double kitchen sink drain setup with a double vanity?


    Converting a single to a double, and would like to avoid doing a lot of damage since the room is fine other than the countertop and sink..

    Oddly enough I seemed to luck out with the water supply though, they seemed to be roughed in for a double since I have supply lines on both sides, and they just are connected to one and the others capped.

    Not really fond of all the slip joints under there and it all lining up. Just wasn't sure if for some reason this is highly discouraged for vanities

  2. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego
    We usually connect double vanities that way trap, one outlet into the stack. In some areas, and when you talk to other plumbers, separate traps and separate connections to the stack are preferred. I will admit that the set up you have probably drains a little slower, but don't see it as a big issue. I use all inch and a half below the pop-up, rather than any inch and a quarter.
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  4. srdenny

    srdenny Plumbing Contractor

    Sep 11, 2004
    Plumbing Contractor
    SF Peninsula
    In UPC country, the maximum, distance allowed between center lines of two bowls hooked together into one trap is 30".
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