How to Test a Scuba Regulator

Testing a scuba regulators prior to use is extremely important. The functionality of the regulator with regard to seals, air flow, delivery and structure is critical to a successful and safe dive. Any imperfections within the regulator system can cause the regulator to free-flow, or not deliver air at the optimized rate. Remember, a regulator is essentially part of a life-support system. So all parts of the regulator should be checked comprehensively to ensure the device is free of flaws that could induce life-threatening accidents. This information can also be used when purchasing second-hand regulators.

Instructions

    • 1

      Visually inspect the first and second stage for any cracks, corrosion, discoloration, or salt build-up. Follow this by visually checking the hoses to see for any defects along the length. Breathe from the second stage to see if a vacuum is maintained when you hold a breathe, indicating whether the regulator is watertight.

    • 2

      Connect the regulator assembly to a scuba tank filled with air. Slowly turn on the valve and listen for any hissing or popping sounds. This is to check for any leaks within the system when it is turned on.

    • 3

      Lightly press the purge valve on the front of the regulator to start a free flow. Release your finger and the flow should cease. If the valve remains open, then this needs attention.

    • 4

      Place the mouthpiece of the regulator second stage in your mouth and draw a slow breath. Continue to breathe, checking that it is possible to inhale and exhale through the regulator.

    • 5

      Take the regulator second stage and place it in a bucket of water. Look to see if any bubbles emerge from cracks or holes in the system. Above all listen for hissing as this is normally evident with leaks and high-pressure air.

    • 6

      If the regulator is not being used, turn off the tank valve and press the purge valve to depressurize the tank. Then remove the regulator from the tank valve, re-apply the dust cap to the first stage and place in storage.