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Thread: drain venting

  1. #1
    Jerome W. Young's Avatar
    Jerome W. Young Guest

    Default drain venting

    2005 house; the pool and spa had pipes that appeared to be vent pipes for the drains, but htey were capped off. Both the pool and spa had two drain locations with anti vortex covers. Am i missing something? these vents are not needed? or ?

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  2. #2
    Join Date
    Mar 2007
    Orlando, FL

    Default Re: drain venting

    If (because I can't see the rest of the piping & equipment) those pipes are part of the Suction Limiting Vent System, they need to be open to the atmosphere with tamper resistant covers. If a high vacuum event occurs, the air from the vents breaks the suction.


  3. #3
    Join Date
    Mar 2007
    Ormond Beach, Florida

    Default Re: drain venting

    Typically I see two 90 degree elbows installed on top of those, leaving the opening down-turned.

    As Dom said, they need to be open.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( )

  4. #4
    Join Date
    Mar 2007
    Chandler, AZ

    Default Re: drain venting

    Could this be for future plumbing? I didn't see where the pipes were connected to the pool equipment. I've seen this when folks plan a fountain, or other water feature.
    Just came to mind when I saw the pics.

    Take it easy

    Dave Hill
    Buyers & Sellers Property Inspections LLC


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