Find your propane cylinder; it may be behind a door (depending on the design of your grill)
There are two parts of your grill that you will need to be concerned with: the propane cylinder’s tank valve and the barbecue’s pressure regulator (see illustration).
Before you disconnect the pressure regulator, close the tank valve (turn it all the way to the right, or clockwise).
Once the valve is shut, twist off the threaded pressure regulator.
Remove the tank (on some propane grills, the tank is attached to the barbecue by a restraining bolt or screw; simply loosen this to remove the tank).
When transporting your tank, put it in a secure, well-ventilated location in your vehicle. Place it upright and take it directly to the refilling location. Do not leave the tank unaccompanied in the vehicle.
Reverse the process to reconnect your propane tank, making sure the tank valve is closed when reconnecting the pressure regulator. Replacement propane cylinders often come with a plastic safety cap over the tank valve assembly – simply remove this.
Transporting Your Propane Cylinder Safely
Thinking about safety doesn’t end once your propane cylinder is disconnected! If you’re transporting a propane cylinder for refilling, always:
Transport it upright (with the valve on top) in a secure position to prevent rolling
Close and plug the cylinder valve
Place the cylinder in a well-vented area inside the vehicle
Refrain from leaving the cylinder alone in a hot vehicle; go straight to your propane dealer and straight home when you pick it up.