Double Sanitee Vs Double Wye

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by rmelo99, Mar 13, 2012.

  1. rmelo99

    rmelo99 Network Engineer

    Joined:
    Jul 7, 2006
    Occupation:
    Network Engineer
    Location:
    Connecticut
    My sewer line exits through the sidewall of my basement about 3ft below grade and about 3ft above basement floor. I need to tie in two 4" drains from the floors above, one coming from left and one from right. (and leave a cleanout also). It appears that either of these double DWV fittings would/could do the job with some street elbows on either side.

    I'm in CT and we use IPC for our plumbing code. What will meet code for this application? If both are allowable, any advantage to one vs the other?


    Double Sanitee
    http://www.pexsupply.com/Spears-P428-040-4-PVC-DWV-Double-Sanitary-Tee

    vs

    Double Wye
    http://www.pexsupply.com/Spears-P611-040-4-PVC-DWV-Double-Wye
     
  2. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    A "double san tee", actually a "sanitary cross" is the same as a sanitary tee, it cannot be used in a horizontal drain line. As a practical matter, it is also a poor fitting in a vertical drain line also. EIther a double Y or a double combo has to be used for your application.
     
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  4. rmelo99

    rmelo99 Network Engineer

    Joined:
    Jul 7, 2006
    Occupation:
    Network Engineer
    Location:
    Connecticut
  5. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    WE would need some diagram so we can tell HOW you intend to install the fitting and connect the other items to it. Right now we do not know if it will be horizontal or vertical, or where the other items are coming from to hook to it. A "double elbow" is a very poor drain fitting to use in most cases, although it works fine for vents.
     
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