Always depressurize a regulator before closing the adjusting knob and removing the regulator from the cylinder.
Check diaphragm regulators for creep (leakage of gas from the high-pressure to the low-pressure side when the adjusting knob is turned fully counterclockwise).
Close the regulator. To close the regulator, turn the adjusting knob to the full counter-clockwise position. The regulator must be closed before opening the cylinder valve.
With the regulator adjusting knob turned fully counterclockwise, place both hands on the cylinder valve and open it slowly, allowing the pressure to rise gradually in the regulator.
Vent the gas. Vent the gas in the regulator and/or system, or isolate the system, and vent the gas in the regulator by turning the adjusting knob clockwise so that no pressure is trapped inside the regulator.
