This regulator is designed to be used only with LPG GAS. Always use the proper size regulator that fits your gas cylinder valve. Ensure you have proper ventilation when operating un flued gas appliances. If a leak is suspected, turn the gas off at the cylinder and extinguish all naked flames. Check for leaks by brushing soapy water or liquid detergent over all gas connections. A gas leak will form bubbles. If a leak is found, turn off and never use a match or naked flame. There is no repairable parts. This regulator is disposable. The maximum life is five years after the date of manufacture, after which the regulator must be disposed.