Vent pipe placement

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by jeniferkey, Mar 4, 2011.

  1. jeniferkey

    jeniferkey New Member

    Joined:
    Mar 4, 2011
    Location:
    Fort Worth, TX
    I'm running the pipes for a second floor bathroom in a new addition. I have the lav and shower draining to an exterior gray water area and the water closet with it's own 3" pipe going to the existing septic tank. I was hoping to get away with only one vent for the lav/shower and have attached a picture of the layout. I wondered if I could go with just vent A or just B or if I needed both. Any other comments are welcome.
    [​IMG]
     
  2. jdgoodman

    jdgoodman Journeyman Plumber

    Joined:
    Sep 14, 2009
    Occupation:
    Plumber
    Location:
    Seattle
    Vent pipe

    Only use vet B.
     
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    "A" is redundant, useless, and strictly cosmetic.In fact, there is no condition where "A" would be a proper vent.
     
  5. jeniferkey

    jeniferkey New Member

    Joined:
    Mar 4, 2011
    Location:
    Fort Worth, TX
    Thanks. B it is.
     
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