Help on DWV Diagram

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by Drewski123, Oct 25, 2011.

  1. Drewski123

    Drewski123 New Member

    Messages:
    47
    Location:
    Seattle
    Can the tub drain use the DWV 3" vent? The distance between the tub and the DWV 3" vertical part is less then 15". Or, it has to vent using its own 1.5" vent, and then the 1.5" vent would merge with the 3" vent in the attic?

    Thanks,
    DWV Diagram.jpg
    Last edited: Oct 25, 2011
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,010
    Location:
    Bothell, Washington
    You can't run a toilet down a tub vent in Seattle, or anywhere.

    You will need to run a 1.5" vent between the tub p-trap and the stack and then either go through the roof, or revent at 42" above the floor.

    [​IMG]
  3. Drewski123

    Drewski123 New Member

    Messages:
    47
    Location:
    Seattle
    Thanks Terry. My initial plan was to run the 1.5" vent, but wanted to make sure.
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,647
    Location:
    Cave Creek, Arizona
    Just "running" a 1 1/2" vent is NOT enough, it has to be run CORRECTLY.
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