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  1. #1
    Join Date
    Mar 2007
    Location
    Philadelphia PA
    Posts
    3,177

    Default mechanical vent for toilet?

    This appears to be a mechanical vent, rather than an AAV, venting a toilet. Even if it was an AAV, are they allowed to vent toilets?

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  2. #2
    Join Date
    Mar 2007
    Location
    Columbus GA
    Posts
    3,746

    Default Re: mechanical vent for toilet?

    Quote Originally Posted by John Arnold View Post
    This appears to be a mechanical vent, rather than an AAV, venting a toilet. Even if it was an AAV, are they allowed to vent toilets?
    I don't think so

    From the 2006 IRC

    P3113.1 Size of vents. The minimum required diameter of
    individual vents, branch vents, circuit vents, vent stacks and
    stack vents shall be at least one-half the required diameter of
    the drain served. The required size of the drain shall be determined
    in accordance with Chapter 30. Vent pipes shall be not
    less than11/4 inches (32 mm) in diameter. Vents exceeding 40
    feet (12 192 mm) in developed length shall be increased by one
    nominal pipe size for the entire developed length of the vent
    pipe.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  3. #3
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,244

    Default Re: mechanical vent for toilet?

    Not only that, but the AAV is required to be a minimum of 4" above the weir of the trap, and the weir of the trap in the toilet is about a foot or so above the floor the toilet is setting on ... and that is *under* the floor.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  4. #4
    Join Date
    Mar 2011
    Location
    Sparks,NV
    Posts
    109

    Default Re: mechanical vent for toilet?

    I was under the impression that yo could use them anyplace as long as there was one pipe in the home that went out the roof.

    Nevada IOS#1730
    Nevada Energy Auditor #30
    775-342-4767 www.homecsi.com

  5. #5
    Join Date
    Mar 2007
    Location
    Columbus GA
    Posts
    3,746

    Default Re: mechanical vent for toilet?

    Quote Originally Posted by Robert Ernst View Post
    I was under the impression that yo could use them anyplace as long as there was one pipe in the home that went out the roof.
    AIR ADMITTANCE VALVES

    P3114.4 Location. Individual and branch air admittance
    valves shall be located a minimum of 4 inches (102 mm) above
    the horizontal branch drain or fixture drain being vented.
    Stack-type air admittance valves shall be located a minimum of
    6 inches (152 mm) above the flood level rim of the highest fixture
    being vented.
    P3114.5 Access and ventilation. Access shall be provided to
    all air admittance valves. The valve shall be located within a
    ventilated space that allows air to enter the valve.
    P3114.6 Size. The air admittance valve shall be rated for the
    size of the vent to which the valve is connected.

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

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