Adding two lavatories to existing vent

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by prpsrv, Feb 12, 2009.

  1. prpsrv

    prpsrv New Member

    Joined:
    May 21, 2008
    Occupation:
    Contractor/Real Estate Broker
    Location:
    Los Gatos, CA
    I am remodeling a bathroom and want to use an existing vent pipe which currently serves only a bathtub. I want to add two (2) bathroom sinks in a 6 foot vanity. ech sink would have it's own trap goin straight back to the wall then make two (2) 90 debree turns to reach the drain/vent. The drain is a 2" galvi and reduces upward to a 1 1/2" vent (also galvi) which rises approx 8 feet throught the flat top roof.

    Thanks in advance.
     
  2. kingsotall

    kingsotall Plunger/TurdPuncher

    Joined:
    Aug 17, 2008
    Occupation:
    Hand copper part cleaned ready to go
    Location:
    Flagstaff, AZ Sitting on an upside down 5 gallon b
    Do you need step by step instructions or what is the inquiry¿

    Or is it a declaration¿ :)
     
    Last edited: Feb 12, 2009
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  4. prpsrv

    prpsrv New Member

    Joined:
    May 21, 2008
    Occupation:
    Contractor/Real Estate Broker
    Location:
    Los Gatos, CA
    I want to make sure the vent pipe will handle the fixtures
     
  5. kingsotall

    kingsotall Plunger/TurdPuncher

    Joined:
    Aug 17, 2008
    Occupation:
    Hand copper part cleaned ready to go
    Location:
    Flagstaff, AZ Sitting on an upside down 5 gallon b
    Depends on the code your inspector uses. Here it wouldn't. Two inch roof penetration is required.
     
  6. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    sinks

    The vent pipe would be adequate as long as you connect to the 2" portion for the drains. Why does EACH sink need TWO 90's to connect to the main riser? That would normally be a "deal breaker" to a strict inspector.
     
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