Vent Stack Required?

Discussion in 'Plumbing Building Code' started by GriffMH, Oct 1, 2019.

Help Support Plumbing Forums by donating:

  1. Oct 1, 2019 #1

    GriffMH

    GriffMH

    GriffMH

    New Member

    Joined:
    Oct 1, 2019
    Messages:
    1
    Likes Received:
    0
    Location:
    Denver, CO
    I am remodeling a single story house built in 1902. The 4" cast iron waste stack serving the bathroom is in the basement and originally had a stack vent through the roof, while the horizontal branch for the bathroom is in the crawlspace.
    All the cast iron was taken out except a stub into the basement floor for connecting a new pvc system.

    The exterior walls are soft brick (no framing) and the interior partition wall is flat framed lathe and plaster; long story there is really no place to run vents in the bathroom area and I'm really hoping to avoid re-running a vent stack again if possible.

    I have one place on the opposite side of the bathroom where I can box out a vent stack so I'm hoping to do a wet vent system based on IPC section 912 with an air admittance valve at the sink. I still have to drop the stack vertically once its on the basement side to tie into the existing line... do I have to (by code) or need to (recommended) vent that section? (it would be the white vertical pipe in the images).

    What I'm not seeing the code is can I bend a soil/waste stack so that it goes vertical without needing to make it a Stack Vent?

    Any advice/help appreciated!
     

    Attached Files:

  2. Oct 3, 2019 #2

    frodo

    frodo

    frodo

    Just call me Macgyver Professional Supporting Member

    Joined:
    Sep 28, 2014
    Messages:
    7,645
    Likes Received:
    2,368
    Location:
    ,
    horizontal.png


    aasad.png
     
    Last edited: Oct 3, 2019

Share This Page