Check for gas leaks at the fittings every time equipment is set up. Apply soapy water to the valves, joints, connections, and around the regulator gauges. If bubbles appear, a leak is present.

If gas can be smelled, the equipment should be shut down immediately and the leak's location should be determined. A hose torch that is suspected of leaking should be immersed in a tub or pan of water .Watch for bubbles. Never try to repair leaks on cylinder valves or safety plugs. Contact the cylinder supplier. Following are some rules for safely looking for leaks:

• Never use an open flame to test for leaks.

• Depressurize the hose, regulator, or torch if a leak is found. If the leak is at a threaded connection, open the connection and wipe the sealing surfaces with a clean, dry, lint-free cloth. Check the threads to make sure they are clean and that they are not stripped or bent. Damaged fittings should be replaced. Tighten the connection and repressurize the system.

Test again for leaks. If any are found, depressurize the system again and attach a tag marked "Danger-Do Not Operate-Leaks." Return the equipment for repair.