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Toilet vent pipe placement

Matthew Michaud | Posted in Green Building Techniques on

Is there a way to vent the toilet pipe out through the wall and up instead of piercing the roof?

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Replies

  1. Jacob Weel | | #1

    Not a direct answer to your question, I know, but have you considered using an air admittance valve instead of a traditional drain waste vent? That way, you need no building envelope penetrations at all.

  2. Matthew Michaud | | #2

    and where does it fit in the system? FYI, i will not have an attack space.

  3. John Klingel | | #3

    This can get you started on AAV's, but be aware that they are illegal in some areas. http://www.studor.net/ Check their legality with your local building department before you even look at AAV's. If they are illegal, see a local, reputable plumbing business who will know your codes for proper sewer venting.

  4. Robert Hronek | | #4

    You need a plumbing stack that vent out the top. Sewer gas need a way to vent. An AAV is not a vent. It is closed in 1 direction in the it doesnt let sewer gas in to the home but does allow air in the system to allow a fixture to drain.

    A good use of an AAV would be for a sink in a kitchen island. You dont have a vent going up but you still need to let air in to facilitate drainage.

  5. Robert Hronek | | #5

    You need a plumbing stack that vent out the top. Sewer gas need a way to vent. An AAV is not a vent. It is closed in 1 direction in the it doesnt let sewer gas in to the home but does allow air in the system to allow a fixture to drain.

    A good use of an AAV would be for a sink in a kitchen island. You dont have a vent going up but you still need to let air in to facilitate drainage.

  6. David Meiland | | #6

    Don't know what code you're under, but per the 2009 and 2012 IRC you do not have to go through the roof, you can go through a wall, see http://publicecodes.cyberregs.com/icod/irc/2012/icod_irc_2012_31_par015.htm

  7. Expert Member
    Malcolm Taylor | | #7

    Matthew, There may be some rare exceptions, but I've never heard of a building or plumbing code that allowed air admittance valves to be used when a conventional alternative was available. They have prescribed limited uses in islands and renovations. Certainly for new construction vents are required. What was your rational for trying to avoid plumbing vents?

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