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Brass compression fittings on PVC air line?

Discussion in 'Garage / Workshop' started by bigmooze, Nov 2, 2010.

  1. Nov 2, 2010 at 5:03 PM
    #1
    bigmooze

    bigmooze [OP] Well-Known Member

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    Need some advice from the TW community:

    Can brass compression fittings be used to couple 1/4" diameter PVC air line, such as that used for air bags?

    For me, these are more readily available than the push-to-connect types.
    The lines could be pressurized up to 150 psi (bags will not be operated at this pressure, however).
     
  2. Nov 3, 2010 at 2:28 AM
    #2
    bigmooze

    bigmooze [OP] Well-Known Member

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    Bump, anyone?
     
  3. Nov 3, 2010 at 5:57 AM
    #3
    macgyver

    macgyver Well-Known Member

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    What will be the normal pressure?

    Brass compression fittings are used all the time in household plumbing.
     
  4. Nov 3, 2010 at 6:14 AM
    #4
    OH-MAN

    OH-MAN Well-Known Member

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    You will need the correct compression farrels and inserts to keep the plastic from crushing.
    That being said
    i do not like PVC used in compressed air systems.
    Many do and have no problems, BUT not good.
     
  5. Nov 3, 2010 at 6:14 AM
    #5
    xJuice

    xJuice My spoon is too Big!

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    I've seen people use both types of fittings on air bag setups.
     
  6. Nov 3, 2010 at 6:16 AM
    #6
    macgyver

    macgyver Well-Known Member

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    Whats the matter...are you skurred?
     
  7. Nov 3, 2010 at 6:21 AM
    #7
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    X2 It's not PVC pipe, it's PVC air line. It's designed for air pressure. I've probably got thousands of feet of it out on my manufacturing floor.
     
  8. Nov 3, 2010 at 6:26 AM
    #8
    OH-MAN

    OH-MAN Well-Known Member

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    YES indeed, PVC does not like hydrocarons ( oil from compressor or ? )
    It also becomes very brittle in sunlight or UV rays.

    As the temp goes up the pressure rating drop very quickly.
    Compressors produce very hot air and many introduce oil into the compressed air.
    Pipe can fail and schrapnel will fill the air.

    Air lines for bags are a different plastic I think.
     
  9. Nov 3, 2010 at 6:30 AM
    #9
    Southern01Taco

    Southern01Taco Well-Known Member

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    You can use them. Some people prefer to use compression fittings over push to connect because they claim it gets a better seal. On my s10 I have used both compression and push to connect and they both work good.
     
  10. Nov 3, 2010 at 6:46 AM
    #10
    bigmooze

    bigmooze [OP] Well-Known Member

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    Thanks for all the replies, I'll see how it works out and report back.
     
  11. Dec 14, 2010 at 9:20 PM
    #11
    R6Racer

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    PVC & Air pressure lines = EXTREMELY BAD
    Don't do it.
    PVC is NOT designed to hold compressed air.
    Any one who has told you it's OK to use for air is badly mistaken!
    There are lots of materials you can use for air lines but PVC is one to most definitely stay away from! If you have it in, take it out!!!
    There is no such thing as PVC air line.

    Steve
     
  12. Dec 14, 2010 at 9:44 PM
    #12
    R6Racer

    R6Racer Member

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  13. Dec 15, 2010 at 8:21 AM
    #13
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    We are talking tubing, not pipe. You're comparing apples to oranges.

    [​IMG]

    [​IMG]

    [​IMG]
     
  14. Dec 15, 2010 at 8:36 AM
    #14
    Janster

    Janster Old & Forgetful

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    we have PVC pipe running off our compressor in our basement and its routed under the floors and into the walls to our garage. Haven't had a problem in 5+ years of having it installed. Our system is 125lbs or less.

    I wouldn't use the brass comprssion fittings (with furls,etc) on PVC.

    Use regular threaded pipe fittings, and quick disconnects (if possible). Nothing wrong with the nylon quick pushloc fittings.
     
  15. Dec 15, 2010 at 8:43 AM
    #15
    Jigzor

    Jigzor Well-Known Member

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    I don't think people understand Ben, try another approach..

    Option #1 above, is what is used at work. We have miles of it on reels.
     
  16. Dec 15, 2010 at 8:45 AM
    #16
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Can't, I keep losing brain cells.
     
  17. Dec 15, 2010 at 4:07 PM
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    R6Racer

    R6Racer Member

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    OOPS
    Sorry , my mistake! :sorry:

    Had a friend get hurt when a PVC pipe that was being used as an air line blew. He was almost 40 feet away & he ended up with a few stitches from it. Could have been MUCH worse! Janster the system that injured my buddy was only 130psi!
    Wouldn't wish that on anyone.

    Steve
     
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