Yet another Single Sink to Double Sink Vanity

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by asdf, Jul 29, 2012.

  1. asdf

    asdf New Member

    Messages:
    1
    Location:
    Toronto
    Hi Everyone,

    Just wanted to ask for some advice before I start tinkering with my second floor bathroom...

    This is the current setup:
    fig 1.jpg

    The pipe on the lower left is the (4"?) stack, the pipe in the middle is the (1.5") vent, and the pipe on the right is the (1.5")drain for the existing vanity. Unfortunately, changing anything between the stack and the wall will be exceptionally difficult due to the way it was installed - There is a floor joist directly underneath the wall so the pipes actually come up through the subfloor about 6 inches away from the wall and then enter the wall cavity... :(

    Would it be possible to do this?

    fig 2.jpg

    Would this be better?

    fig 3.jpg

    Are there any other possibilities?

    Thanks in advance!
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,000
    Location:
    Bothell, Washington
    You can't run waste down a vent.

    This drawing would be the best, as it keeps the vent a vent.

    [​IMG]
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