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How do I troubleshoot CO₂ leaks?

  1. Pressurize the regulator to isolate the leak by turning the CO₂ tank valve counterclockwise to turn on the tank.
  2. If the high-pressure gauge needle moves, this is a good indication that you are receiving a reading. You should be receiving a reading between 500 and 1,000 PSI, depending on the temperature of your tank, the ambient temperature, and altitude. If the needle moves, this is a good indication that you are receiving a reading.
  3. Put pressure on the low-pressure side (this is the line that is pushing CO₂ to your kegs) by turning the pressure adjustment knob on the regulator clockwise until you receive a reading of 10 PSI.
  4. Once the regulator is set to 10 PSI, shut off the valves that send gas out of the regulator by turning them 90 degrees.
  5. Turn your CO₂ tank off by turning the valve clockwise.
  6. Check your pressure gauge to see if the pin has moved at all.
    • If it drops, you have a leak somewhere between the shut-off valves and the tank.
    • First, check the connection between the CO₂ tank and regulator. The most common place to find a leak is at this location. It can be easily fixed by tightening the connection with a wrench.
    • If you have a leak in the regulator, it can be fixed with Teflon tape or tightening the connection with a wrench. Be sure to only use Teflon tape on a tapered pipe thread (NPT) connection. It will fill in the gaps between the connection and prevent leakage.
    • If the needle doesn’t drop and your regulator is maintaining pressure, let the system sit for 15 to 20 minutes and the ncome back to see if the needle has moved. This method will spot any small leak you may have in your system.
    • If your needle drops, you may have a small leak in your regulator. Tighten the connection with a wrench.
    • If your needle still doesn’t drop, open your regulator valves one at a time to each beer line. If the needle drops after opening the valve, you’ll know that particular line or tube has a leak. Also, you will know that t he leak is occurring between the shutoff valve and the keg.
  7. Now that you know the general location of the leak, to find the precise location of the leak, you need to pressurize the line again by turning the CO₂ tank back on.
  8. Mix a solution of liquid dish soap with the water in a spray bottle. Generously spray all the connections of the suspected leak zone including all threaded connections and lines.
  9. If there is a leak, it will begin to bubble to indicate a leak at that location, when you spray the connections.
    • If the leak is at the connection, tighten the connection with a wrench.
    • If the leak is on a hose, cut the damaged section out or replace it with a new hose.
    • If the leak is at the keg coupler connection, tighten until snug. If the silicon check valve in the coupler is damaged, replace it with the spare part from your spare parts bag.

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