Which one is the toilet vent?

Discussion in 'Toilet Forum discussions' started by cysperus, May 7, 2006.

  1. cysperus

    cysperus New Member

    Messages:
    1
    There's a lot of pipes sticking out from my Roof. Some have covers and some do not. How do you know which one is a plumbing vent?
  2. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    It will be white plastic, cast iron or copper depending on when your house was built and it won't have a cover. It will also be 3-4" ID and will look like 4-5" from the ground looking up.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,615
    Location:
    Cave Creek, Arizona
    vent

    Then I guess all the black pipes sticking out of houses around here are not vents. And the number of newer ones, (i.e., those within the last 10-15 years), with a 3" or 4' vent out the roof might not add up to a handful.
  4. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    Oh yeah ABS. There is none around here, I only see it rarely and then never out the roof, always just 1.5". The only other oddity I have seen once is a house built with Sch. 80.
  5. abikerboy

    abikerboy DIY Senior Member

    Messages:
    202
    Location:
    VA
    Turn on water in sink, tub/shower, and/or have someone flush toilet while listening at top of each pipe. Went through this at my mom's house while trying to find bathroom vent, and even with vent pipe plugged solid with debris, I could still hear the sound of draining water at top of vent pipe when toilet was flushed. Also, turn on exhaust fans. That way you can eliminate these pipes first thing.
    Rob
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