Smell a gas leak? If you're in an emergency situation and need to turn the propane gas off, here is how to do so. IMPORTANT: Just remember, only a propane professional, like those of us here at Superior Energy, LLC, should turn the tank back ON! This is to best ensure that the tank and your home is safe first. And, as always, WE'RE HERE TO HELP. OUR EMERGENCY SERVICES ARE AVAILABLE 24 HOURS A DAY, SEVEN DAYS A WEEK at 1-800-242-0427.