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  1. #1
    daniel nantell's Avatar
    daniel nantell Guest

    Default dwv pipe through roof

    I know you have to have at least one dwv pipe vented throught the roof, does that mean that the other dwv pipes can be vented to attic space ? thanks

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  2. #2

    Default Re: dwv pipe through roof

    No,

    if allowed in your area, I take that to mean that you can use AAV's. You don't want to vent sewer gases into the attic.

    In my state, AAV's/ mechanical vents are not allowed at all.


  3. #3
    A.D. Miller's Avatar
    A.D. Miller Guest

    Default Re: dwv pipe through roof

    Quote Originally Posted by daniel nantell View Post
    I know you have to have at least one dwv pipe vented throught the roof, does that mean that the other dwv pipes can be vented to attic space ? thanks
    DN: In case you don't know what BW is referring to:

    Air Admittance Valves


  4. #4
    Join Date
    Nov 2007
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    548

    Default Re: dwv pipe through roof

    The pipes can go into the attic and tie into the vent that is going through the roof.

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    Last edited by Ron Hasil; 08-08-2009 at 08:51 PM. Reason: added picture

  5. #5

    Default Re: dwv pipe through roof

    Ron,

    I know of one plumber that no matter where the pipes come up into the attic, will tie them all together like that. It's for aesthetics, and to help prevent issues with leaks at the roof penetrations. Seems like a great idea-- some may call it a waste of pipe.


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