Water Heater ATP discharge line - how far off ground outside

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by fortop, Mar 3, 2012.

  1. fortop

    fortop New Member

    Joined:
    Nov 9, 2007
    Location:
    Tucson
    I am installing a new gas water heater in a utility closet which will have an ATP discharge line going through an outside wall and terminating in a 90 degree bend and short pipe pointed down toward the ground. How far off the ground should that termination after the 90 be? Seems like I read a min/max limit in UPC somewhere.
     
  2. jimbo

    jimbo Plumber

    Joined:
    Aug 31, 2004
    Location:
    San Diego, CA
    min 6" max12"
     
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  4. MASTERPLUMB777

    MASTERPLUMB777 Member

    Joined:
    Aug 6, 2007
    Occupation:
    Retired Master Plumber
    Location:
    Texas
    What he said !
     
  5. SteveW

    SteveW DIY Senior Member

    Joined:
    Feb 11, 2005
    Location:
    Omaha, NE
    What is an "ATP discharge line?"
     
  6. bluebinky

    bluebinky Member

    Joined:
    Aug 31, 2011
    Occupation:
    Software Engineer
    Location:
    Santa Clara, CA
    Automatic Temperature and Pressure relief valve discharge line -- I think :cool:
     
  7. SteveW

    SteveW DIY Senior Member

    Joined:
    Feb 11, 2005
    Location:
    Omaha, NE
    Thanks - figured it was in reference to the water heater's temperature/pressure valve but thought maybe this was something new.
     
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