Follow the instructions in the grill owner's manual to test all fittings for leaks. Replace cracked hoses and leaking fittings before you use your grill. If you smell a gas odor around the tank, immediately turn off the gas and don't attempt to light the grill or use any source of ignition in the area until the leak is fixed. Store cylinders, including those attached to barbecues, outdoors in a shaded, cool area out of direct sunlight. Be sure the attendant who fills your portable propane tank leaves space in the tank to allow for expansion of the liquid propane.
Propane readily expands as the temperature rises.
If the tank is overfilled, the vapors will be pushed out the vent, creating an explosion hazard. Propane vapors are heavier than air, will collect in low areas, and can travel an extensive distance to an ignition source. Fire may follow the stream of fluid back to the container, causing an explosion and scattering flaming liquid. The safest starters are chemicals in cake form or a UL listed electric starter. Use caution in disposing of the ashes.