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Thread: Using existing tub water/drain for sink

  1. #1
    DIY Junior Member Fidget's Avatar
    Join Date
    Oct 2009

    Default Using existing tub water/drain for sink

    Im installing a wet bar sink on the backside of an existing bathroom wall that has access to the tub overflow drain pipe as well as the 3/4 water pipes serving the tub from the main. I want to T the sink drain off the overflow drain coming from the tub and run the water off the tub water pipes. I dont know if this is to code or not. The sink drain trap and vent (interior) will be prior to drain pipe entering the wall and doing a 90 degree down to the overflow pipe on the tub. If T ng into the O/F drain is not good, I have, close by and accessible, a 4 inch sanitary stack with clean outs that I can tap as well. Again, dont know if this is doable via code. I live in Virginia and will be going to the County offices on Monday. Just want to know if Im in the ball park.


  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default drain

    Neither one should be acceptable to the building department, but for different reasons.


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