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  1. #1
    Join Date
    Jan 2020
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    Leaking buried LL lines

    Posted a thread yesterday around 6:30, cannot be found. I added tags, did not know I could not create new one.

    How to best find a leak and repair HVAC Liquid Line in the ground, concrete and walls.

  2. #2
    Join Date
    Oct 2011
    Location
    Culver, Oregon (Central OR)
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    Quote Originally Posted by Grabbeus View Post
    Posted a thread yesterday around 6:30, cannot be found. I added tags, did not know I could not create new one.

    How to best find a leak and repair HVAC Liquid Line in the ground, concrete and walls.
    Install a new one above ground.

  3. #3
    Join Date
    Jan 2020
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    Thread Starter

    Leaking buried LL lines

    Quote Originally Posted by Adlerberts-Protege View Post
    Install a new one above ground.
    Thanks, but it is a 3 story appt. building I am on the 2nd floor, nothing to go on the outside the building.
    I had it all described in my post last night 6:30, it does not show, maybe I added tags I was not suppose to do.

    I will ask my local the HVAC pros:
    1-What about direct inject leaking savers, does it work?
    2 - What about the leak detecting fluid one can use an electronic sniffer with?
    3 - What about using a freon gas sniffer?
    4 - He, he, what about applying water pressure?
    Grabbeus

  4. #4
    Join Date
    Aug 2002
    Location
    Southold, NY
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    27,426
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    Quote Originally Posted by Grabbeus View Post
    Thanks, but it is a 3 story appt. building I am on the 2nd floor, nothing to go on the outside the building.
    I had it all described in my post last night 6:30, it does not show, maybe I added tags I was not suppose to do.

    I will ask my local the HVAC pros:
    1-What about direct inject leaking savers, does it work?
    2 - What about the leak detecting fluid one can use an electronic sniffer with?
    3 - What about using a freon gas sniffer?
    4 - He, he, what about applying water pressure?
    Grabbeus
    Usually there a last ditch effort and shortly there after something major fails.
    How did they determine the leaks in the line set?

  5. #5
    Join Date
    Dec 2007
    Posts
    9,520
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    Quote Originally Posted by Grabbeus View Post
    Thanks, but it is a 3 story appt. building I am on the 2nd floor, nothing to go on the outside the building.
    I had it all described in my post last night 6:30, it does not show, maybe I added tags I was not suppose to do.

    I will ask my local the HVAC pros:
    1-What about direct inject leaking savers, does it work?
    2 - What about the leak detecting fluid one can use an electronic sniffer with?
    3 - What about using a freon gas sniffer?
    4 - He, he, what about applying water pressure?
    Grabbeus
    How would any of that work if the lines are inaccessible? You state in the ground, walls or concrete.
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

  6. #6
    Join Date
    Jan 2020
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    Thread Starter
    They applied 350 PSI on both lines, the LL line went to 285 in minutes.

  7. #7
    Join Date
    Jan 2020
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    Thread Starter
    I am not so worried about the concrete, more about the ground and walls, one can sniff the laek out I imagine.

  8. #8
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
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    If there in concrete they should be sleeved so new can be pulled
    In the wall cut the Sheetrock.

  9. #9
    Join Date
    Jun 2014
    Location
    Dover, DE
    Posts
    11,862
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    Has the lineset been isolated and pressure tested? Are you certain that’s where the leak is?
    I havent failed. Ive just found 10,000 ways that wont work. - Thomas Edison

    Its not whether you get knocked down, its whether you get up. - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

    Local 486 Instructor & Service Technician

  10. #10
    Join Date
    Jan 2020
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    Thread Starter
    Thanks, yes, understood!

  11. #11
    Join Date
    Jan 2020
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    Thread Starter
    Yes, pressurized and tested 350 PSI and then 285 on the LL line shortly.
    I do not know where the leak is yet

  12. #12
    Join Date
    Jan 2005
    Location
    Emerald Coast
    Posts
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    .

    How long has the copper been buried?
    ..
    Do not attempt vast projects with
    half vast experience and ideas.
    ...

  13. #13
    Join Date
    Dec 2007
    Posts
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    Quote Originally Posted by Grabbeus View Post
    Yes, pressurized and tested 350 PSI and then 285 on the LL line shortly.
    I do not know where the leak is yet
    Did it continue to leak or stabilize at 285psig?
    Quote Originally Posted by Sleuth View Post
    .

    How long has the copper been buried?
    Very good point!!! Copper will deteriorate over time. Even if you repair the leak, another is sure to emerge soon.
    ..
    .
    The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
    Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
    from an excerpt by Paul Jacob in Sun City, AZ

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