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Tracing compressed air system leak

Discussion in 'Technical Discussion' started by Pascal, Mar 21, 2026 at 11:46 AM.

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  1. Pascal, Mar 21, 2026 at 11:46 AM
    #1
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
    8,831
    Location:
    Miami, FL
    Trying to find a way to find a leak in our compressed air system. Air compressor runs fine and builds pressure in the tank but once the tank outlet valve is open, pressure drops and never builds again. Tried to listen for air leaks, sprayed soapy water on visible connections. No luck.

    it s long hose run from the compressor in the ER to the horn solenoid valve in the skylounge, including a second accumulator tank and a drain pipe going back down to the ER…

    i considered using pressurized water but draining it all afterward may be be tough and the leak could cause water damage

    Has anyone used an automotive smoke generator ? Provides up to 7 PSI or pressure.
  2. Norseman, Mar 21, 2026 at 4:28 PM
    #2
    Norseman

    Norseman Senior Member

    Joined:
    Feb 24, 2005
    Messages:
    3,483
    Location:
    Palm Coast, Florida
    Smoke in the system then look for a leak at night using a flash light at each joint/connection.
    I had to use the same method to find a small diesel exhaust leak, I could smell the exhaust in day light but couldn’t see it, at night I could with a flash light, very small leak, but I was ****..Still is.:cool: