Condensation lines

Discussion in 'HVAC Heating & Cooling' started by sneezye, Dec 21, 2009.

  1. sneezye

    sneezye New Member

    Messages:
    7
    Location:
    Tulsa, OK
    Would it be abnormal for an HVAC unit to have two condensation lines? I have two 3/4" pvc lines (one from each side of the unit) running down from my attic to the crawlspace under the house.
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,893
    Location:
    New England
    From what I hear, this is not abnormal...one is for the primary drip pan, the second is the emergency or secondary pan. If you ever walk by, you'd normally only see water coming from one. If you see it from the other, you have a problem, and it is time to fix it before you have a flood, ruining your ceilings and maybe walls and floor as well.
  3. sneezye

    sneezye New Member

    Messages:
    7
    Location:
    Tulsa, OK
    and the next question...

    IF that were the case, could they be combined into 1 pipe?
    I am moving the pipes and would prefer to wye them together to avoid having 4 pipes running through my closet (the other two being the WH T&P and overflow). Not that 3 is that much better...
  4. FloridaOrange

    FloridaOrange Plumbing Designer

    Messages:
    1,317
    Location:
    SW Florida
    No, you cannot connect them to one pipe.
    If you want to get rid of the secondary you should have a float switch installed (if possible with your existing arrangement) which would turn the unit off at a predetermined level in the pan.
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,893
    Location:
    New England
    The whole idea of a secondary line is it is an entirely separate path, so if one has problems, the other can take up the slack.
  6. sneezye

    sneezye New Member

    Messages:
    7
    Location:
    Tulsa, OK
    Alright. I will leave it as it is. It's better to find things correct than to find things... well, messed up. Thanks, guys.
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