Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves familiarize yourself with the gas system shut off valve Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves Turn off the main valves