Bathroom Venting Question

Discussion in 'Remodel Forum & Blog' started by Eddie W, Nov 12, 2018.

  1. Eddie W

    Eddie W New Member

    Nov 2, 2018
    I also posted this in the DIY forum...not sure which was more appropriate...

    I'm expanding a small bathroom (by adding what was a small bedroom) to make a large master bath.

    I've tied into the existing 3" drain. which has a 2" vent stack where an old sink used to be. I've removed the sink but kept the vent.

    I'm also adding a tub and double vanity (see layout and photo) to the original 3" drain.

    My question is: per the 2012 ; do I need additional vent stacks? If so, would creating a 2" vent above one of the vanities be enough?



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