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  1. #1
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    Finding a vacuum leak

    Lets say you just brazed in a compressor and drier, you leak checked in your normal fashion and nothing showed. But you notice that the micron gauge isn't responding well.

    With the pump running and the system in a vacuum, how would you leak check?

  2. #2
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    In theory, you can't. However, I've been tempted to buy some sort of smoke to spray, and watch to see if any pulls into the system. Don't want to contaminate it though.

    Sent from my SM-G920V using Tapatalk

  3. Likes Core_d liked this post
  4. #3
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    Did this today
    Used my ultrasonic detector

  5. #4
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    Quote Originally Posted by BrokenHart View Post
    In theory, you can't. However, I've been tempted to buy some sort of smoke to spray, and watch to see if any pulls into the system. Don't want to contaminate it though.

    Sent from my SM-G920V using Tapatalk
    What are you smoken?:-)

    Sent from my SM-S320VL using Tapatalk

  6. #5
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    Thread Starter
    Quote Originally Posted by itsiceman View Post
    Did this today
    Used my ultrasonic detector
    You don't need the ultrasonic to find the leak.

  7. #6
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    You're right but I have one so I used it

  8. #7
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    If I "leak checked in the normal fashion and it didn't show any leaks.....but.....my micron gauge didn't respond well."

    Not sure what that means, other than you have a leak....then....I would check all my hoses and hose seals to the micron gauge, and eliminate any leaks in my rig. After that, process of elimination says there's a leak In the system. Keep in mind, leaks will show In a vacuum, when they won't show in positive pressure.

  9. Likes skwoodwiva2 liked this post
  10. #8
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    Quote Originally Posted by 71CHOPS View Post
    If I "leak checked in the normal fashion and it didn't show any leaks.....but.....my micron gauge didn't respond well."

    Not sure what that means, other than you have a leak....then....I would check all my hoses and hose seals to the micron gauge, and eliminate any leaks in my rig. After that, process of elimination says there's a leak In the system. Keep in mind, leaks will show In a vacuum, when they won't show in positive pressure.
    Good advice man.

  11. #9
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    Thread Starter
    Quote Originally Posted by 71CHOPS View Post
    If I "leak checked in the normal fashion and it didn't show any leaks.....but.....my micron gauge didn't respond well."

    Not sure what that means, other than you have a leak....then....I would check all my hoses and hose seals to the micron gauge, and eliminate any leaks in my rig. After that, process of elimination says there's a leak In the system. Keep in mind, leaks will show In a vacuum, when they won't show in positive pressure.
    Say you suspect it was in your hoses, gauges or micron gauge, how would you isolate the leak without shutting down the vacuum?

  12. #10
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    Quote Originally Posted by jimp View Post
    Say you suspect it was in your hoses, gauges or micron gauge, how would you isolate their leak without shutting down the vacuum?
    Connect your hose ends together and do a rise test b4 you start.

    Or stop the vac & do it now.

  13. #11
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    Quote Originally Posted by skwoodwiva2 View Post
    It comes as a firm confirmation to kick you in the *utt to look in different places. You can hear them, feel the sound change under your sliding hands.

    Close valves to find a localization of the vacuum rise.
    Next

  14. #12
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    I misread your post see re-edit.

  15. #13
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    Ok so this wasn't a question you were asking but some kind of game show?
    Will this be worth the wait?
    The longer this goes I doubt it

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