Propane: Do not tamper with your gas supply lines, any safety devices, regulators, or storage tank fittings. Never attempt to repair any gas appliance yourself. Know where your main gas shutoff valve is located. Do not place any flammable and combustible materials near any open flames that originate from your appliance. (examples: paper, clothing, wood, gasoline, and solvents) Do not store propane cylinders or containers inside any enclosed buliding. Never assume a propane smell is because your tank is empty. If an odor is persistant you could have a serious leak.