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  1. #1
    Join Date
    May 2005
    Posts
    1,400

    water pipe instead of refrigeration pipe?

    im in a bind, im 250 miles from the nearest source of refer copper..and im up to my ears in alligators..can i use water pipe if i clean it? i dont wana lose any sleep.
    its 5/8 and 7/8 pipe..not long runs..

  2. #2
    Join Date
    Jan 2010
    Posts
    6,829
    Are you talking about type M copper water pipe? L Type has a thicker wall.

  3. #3
    Join Date
    May 2005
    Posts
    1,400
    if i were to substitue water pipe what class would i use?

  4. #4
    Join Date
    Jan 2010
    Posts
    6,829
    Use soft copper if you can get some.Will come in 5/8 & 7/8. I think type M is I.D.not O.D.

  5. #5
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,486
    Avoid the type M for refrigeration because of the lesser wall thickness. You could use type L which is the same thickness as ACR.

    The OD of M, L and K copper is always 1/8" larger than the listed size. ACR is always the actual OD dimension.

    Run nitrogen when brazing, change the filter-drier, pull a proper vacuum and you should be OK. No it's not per the book, but in a pinch like this, I'd do it.

    Here's some reading for you:
    http://www.copper.org/publications/p...e_handbook.pdf

    It's also listed in the Educational Forums:
    http://hvac-talk.com/vbb/showthread.php?t=165373

  6. #6
    Join Date
    May 2005
    Posts
    1,400
    thanks ice-dude, youve alway been a great help..

    ill commit your links to memory..

  7. #7
    Join Date
    Feb 2010
    Location
    butler pa
    Posts
    1,073
    and be sure theres no styrofoam peanuts/dirt etc in the pipe as water pipe
    wont have the protection from debris like sealed acr tubing does..

  8. #8
    Join Date
    Mar 2005
    Location
    Alberta, Canada
    Posts
    474
    ACR is just L copper that has been factory purged.
    You can use M but you need to be aware of the burst ratings (allot of old school 1950's installed were done with M and soft solder.)

    I would defiantly NOT use used water line.
    7/8 (3/4"ID)
    Type L rated for 583psi
    Type M rated for 407psi

    5/8" (1/2"ID)
    Type L rated for 723psi
    Type M rated for 494psi

    These are Annealed numbers since the weak point will be copper that was heated when brazing the joints.

    Please download THIS and have a read (everybody) it will answer allot of questions and clear up allot of old wives tales.
    "I'm really easy to get along with once you people learn to see it my way."

    "I'll try being nicer if you'll try being smarter."

  9. #9
    Join Date
    Dec 2006
    Location
    Middle Tennessee
    Posts
    11,347

    *

    Quote Originally Posted by pauls heating & View Post
    and be sure theres no styrofoam peanuts/dirt etc in the pipe as water pipe
    wont have the protection from debris like sealed acr tubing does..




    .

  10. #10
    Join Date
    Sep 2002
    Posts
    13,551

    Or use Stay Brite and have stronger joints

    Because the Stay Brited joints won't be annealed to weakness.

    PHM
    --------



    Quote Originally Posted by bryan l View Post
    ACR is just L copper that has been factory purged.
    You can use M but you need to be aware of the burst ratings (allot of old school 1950's installed were done with M and soft solder.)

    I would defiantly NOT use used water line.
    7/8 (3/4"ID)
    Type L rated for 583psi
    Type M rated for 407psi

    5/8" (1/2"ID)
    Type L rated for 723psi
    Type M rated for 494psi

    These are Annealed numbers since the weak point will be copper that was heated when brazing the joints.

    Please download THIS and have a read (everybody) it will answer allot of questions and clear up allot of old wives tales.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  11. #11
    Join Date
    Jan 2006
    Location
    Near Atlanta, GA.
    Posts
    14,627
    Not recommended, but I've done it when in a pinch and had no problems. Especially for a suction line.

    Sometimes you gotta do what you gotta do when you have a unit down and can't get the right stuff.

  12. #12
    Join Date
    Mar 2008
    Location
    wi
    Posts
    282
    I've had to do it to and as far as I can remember those systems are still running fine. Not my way but it works. Sometimes you gotta do what it takes in a bind as long as its safe

  13. #13
    Join Date
    Sep 2002
    Posts
    13,551

    Confessions of a hackster -

    I have always used copper from the plumbing supply and copper from the refrigeration supply interchangeably. L copper and ACR copper are both L copper. And I have used M copper for suction lines since the 1980's.for decades.

    I have successfully built liquid receivers for R-22 and R-502 from both M and DWV copper.

    Hell; I'm going to built a shell & tube heat exchanger from DWV or M copper as soon as I can find some 4" and some sheet copper or brass for the tube sheets.

    Hey! Does anybody have a few feet of 4" or larger copper laying around? I guess I could use 3" if I Have to. <g>

    Read the specs and stop worrying so much. <g>
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

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