How do I remove this fitting from copper tube? Air compressor.

Discussion in 'Wrenchin' Secrets' started by NZ GS 400, Feb 5, 2018.

  1. NZ GS 400

    NZ GS 400 Gold Level Contributor

    Hi guys,

    I am in the process of replacing my air compressor pressure switch and the nut that connects the copper tube from the compressor to the switch is a different size on the new switch than on the old. How do I remove the old crimp thingy so that I can get the old nut off? I am thinking using a die grinder with a small cut off wheel. fitting 1.jpg fitting 2.jpg
    Last edited: Feb 5, 2018
  2. red67wildcat

    red67wildcat Well-Known Member

    some times you can work them back and forth with a pair of pliers pulling at the same time
    take a hack saw blade carefully cuting brass bushing --Do not nick the copper line!!!! untill almost thru then you can get bushing to crack with pliers
    or buy a short piece of line and start over
    or you can buy adapter bushings from old size to new
  3. NZ GS 400

    NZ GS 400 Gold Level Contributor

    Thanks Roy.
  4. Bluzilla

    Bluzilla a.k.a. "THE DOCTOR"

    Looks like a compression fitting. They are a one time crimp. If there is enough tube you can simply cut it off and install the new nut and ferrel. Once you tighten it it will self crimp. If it's not going to reach you can cut it off further down and ad a section on with a compression union, ..... then install the new nut and ferrel.

  5. greatscat

    greatscat Well-Known Member

    use a tubing cutter just below the crimped fitting if you have enough length.
  6. NZ GS 400

    NZ GS 400 Gold Level Contributor

    Thanks guys. I used a hack saw and cut the tube just below the fitting. My compressor is back in action! :)

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