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  1. #1
    Join Date
    Mar 2007
    Location
    Anacortes, Washington
    Posts
    395

    Default Single plumbing stack

    I inspected a 1970's raised rancher with 3 bathrooms and kitchen. The home only had a single 4" (maybe 6) vent over one corner of the home. The kitchen sink was 20' from the vent and the master bath was about 30' from the stack. I was not able to view the attic connections due to an access issue.

    do plumbing codes allow for a single vent???



    Thanks

    //Rick

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    Rick Bunzel
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    360-588-6956

  2. #2
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,252

    Default Re: Single plumbing stack

    Yes, if the fixture unit count is within the number of fixture*units for the 4" vent.

    In 1990's houses and newer, I would anticipate finding AAVS at the other fixtures.

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

  3. #3

    Default Re: Single plumbing stack

    Quote Originally Posted by Jerry Peck View Post
    Yes, if the fixture unit count is within the number of fixture*units for the 4" vent.

    In 1990's houses and newer, I would anticipate finding AAVS at the other fixtures.
    Or, there are branch vents that connect to the main you cannot see.

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  4. #4
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,252

    Default Re: Single plumbing stack

    Quote Originally Posted by JeffGHooper View Post
    Or, there are branch vents that connect to the main you cannot see.
    The fixture unit rating of the one vent would still be required to meet the fixture unit load.

    And unless all the fixtures were basically back to back to back, revents would be required anyway.

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

  5. #5
    Join Date
    Mar 2007
    Location
    Anacortes, Washington
    Posts
    395

    Default Re: Single plumbing stack

    Thanks!

    //Rick

    Rick Bunzel
    WWW.PacCrestInspections.com
    360-588-6956

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