Can I use a 37° flare tool for a 45° fitting?

Discussion in 'HVAC Heating & Cooling' started by North Jersey, Oct 23, 2009.

  1. North Jersey

    North Jersey New Member

    Messages:
    107
    I'm receiving conflicting information about the proper flare angle on the line set for a two-ton R410a mini split unit. Since the copper tubing is pretty maleable, do you think I could get away with using my 37° Ridgid flare tool and counting on the force exerted by the flare nut to properly shape the tubing if the required angle turns out to be 45°?
    Last edited by a moderator: Oct 23, 2009
  2. Bill Arden

    Bill Arden Computer Programmer

    Messages:
    584
    Location:
    MN, USA
    It might work... or it might cause the copper to crack from the dual bending.
  3. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    While I am not an HVAC guy I would not try and put 2 different angles together unless you want to be recharging it down the road...it just doesn't make sense...the angles are for a reason and trying to do what you are suggesting is not good...do it right and do it once...don't do something that may cause problems or damage another part...
  4. North Jersey

    North Jersey New Member

    Messages:
    107
    I was hoping that underflaring the tubing wouldn't be a problem. I guess I'll have to dig a little deeper to find out what that angle is. A Yellow Jacket distributor has brochure that states the LG units use a 37° flare, but a first level tech at LG told me to use 45°. I'll let you know what I find out.
  5. North Jersey

    North Jersey New Member

    Messages:
    107
    *update*

    I talked with a second LG tech who confirmed that the flare should be 45°. He initially told me it was 37°, but he corrected himself after a quick look at the training manual. I hope this information comes in handy for someone else.
    Last edited by a moderator: Oct 29, 2009

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