Which fitting to connect two horizontal vents into one vertical?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by pbfj84, Jan 9, 2012.

  1. pbfj84

    pbfj84 New Member

    St. Louis, MO
    I have 3" and a 1 1/2" horizontal vents that i want to tie together and go vertical out the roof.

    This connection will be made in the ceiling before going out the roof.

    I thought about using a combo wye/tee or sanitee fitting but those fittings would only slope back to the vent in one direction. Doesn't it need to slope back to both vents?
    A two way clean out fitting is the only thing I know of that would accomplish that.
  2. Terry

    Terry Administrator Staff Member

    Bothell, Washington
    Since the connection is above the flood plane of the fixtures below, you can use a santee.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Cave Creek, Arizona
    ABS, and PVC, fittings do NOT have a "fixed slope" to them. Once you apply the cement you can "bend" them as necessary to get the slope. I do not know how you intend to make the connection or how a "two way cleanout would work because you would have to use bushing to reduce to the branch sizes. Almost any conventional fitting will work, but you may be thinking of a "vent tee" which is "square" without any "sweep" in either direction.
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