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  1. #1
    Join Date
    May 2011
    Location
    Pennsylvania, USA
    Posts
    48
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    Roof Top Unit Condensate Drain Lines

    I have a few roof top units I have issues with condensate traps freezing and breaking over the winter. What do you guys do to prevent this issue?

  2. #2
    Join Date
    Jul 2015
    Location
    Bowmanville, ON
    Posts
    76
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    Empty them on fall maintenance, prime them on spring start-up! I also stock some generic 3/4 pvc pipe and fittings to repair broken ones during routine maintenance. If your worried about odours and such being drawn in, I suppose you could prime the drain with a bit of antifreeze solution, or maybe a salt water brine to keep the environment happy but even then it can certainly still freeze on those real cold nights. I find the PVC even if not drained holds up pretty well for a few seasons freezing over.

  3. #3
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    27,150
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    T in the bottom of the trap with a plug that's removed in the winter.

  4. Likes cburns liked this post.
  5. #4
    Join Date
    Sep 2007
    Location
    edmonds wa
    Posts
    4,434
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    Drain it for the winter.
    UA Local 32 retired as of Jan 2020

  6. #5
    Join Date
    Mar 2010
    Location
    Arnold, Mo
    Posts
    1,004
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    I believe Timebuilder recommends not gluing the pieces together. When they freeze, they'll just come apart.

    Sent from my SM-N910P using Tapatalk

  7. #6
    Join Date
    Sep 2003
    Posts
    60
    Post Likes
    Use V-traps. Go vtraps.com

  8. #7
    Join Date
    Apr 2010
    Location
    Texas
    Posts
    531
    Post Likes
    Quote Originally Posted by yewbee View Post
    Use V-traps. Go vtraps.com
    Got anymore info on that? Better pics of the inside?

  9. #8
    Join Date
    Sep 2003
    Posts
    60
    Post Likes

    Vtraps

    Quote Originally Posted by CHAINIK View Post
    Got anymore info on that? Better pics of the inside?
    Go to their web site vtraps.com

  10. #9
    Join Date
    Apr 2010
    Location
    Texas
    Posts
    531
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    Quote Originally Posted by yewbee View Post
    Go to their web site vtraps.com
    Right, got that. You already said that. Went there. Not much info. Don't sell them around here. Need better pictures. Unless you wanna send me a sample.

  11. #10
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    32,173
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    Quote Originally Posted by flanders View Post
    I believe Timebuilder recommends not gluing the pieces together. When they freeze, they'll just come apart.

    Sent from my SM-N910P using Tapatalk
    That is correct.

    In addition, they are 100% cleanable, and if a part should crack due to UV damage from the sun, you just replace it.

    You can always tell when a resi guy has been on a roof. Glued traps with purple primer everywhere, and no easy way to clean them, either.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  12. #11
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    32,173
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    Quote Originally Posted by yewbee View Post
    Use V-traps. Go vtraps.com
    Reasons not to:

    1) more expensive than PVC parts

    2) Every time the blower stops, it drains. Then, it has to re-prime.

    3) Some units using VFD's never stop the blower, so it could freeze in a sudden cold snap.

    Nice idea, but like many inventions, it is a solution in search of a problem.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  13. #12
    Join Date
    Sep 2003
    Posts
    60
    Post Likes
    Quote Originally Posted by timebuilder View Post
    Reasons not to:

    1) more expensive than PVC parts

    2) Every time the blower stops, it drains. Then, it has to re-prime.

    3) Some units using VFD's never stop the blower, so it could freeze in a sudden cold snap.

    Nice idea, but like many inventions, it is a solution in search of a problem.


    It solved many problems for our customers. In use for over three years in the northeast and no problems.

  14. #13
    Join Date
    Apr 2014
    Location
    Wisconsin
    Posts
    93
    Post Likes
    I personally build my traps out of 3/4 or 1" pvc. I don't glue any of the fittings together, this way they're easily cleanable and or repairable, and also if we do get a cold spell they will push apart instead of snapping.
    Some of the guys in our company like using the " EZ-Traps"
    While theyre nice and see thru and cleanable, i personally feel they're not the best because after a season or two, the clear part shatters from the UV breakdown.

    Hope this helps!

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