Check out this instructional RV video to learn how to maintain the LP gas system on your recreational vehicle. Open up the compartment and you will see your LP tank. There is a gauge that tells you how much is inside the tank, there is also a fill station where you fill it up, always make sure the cap is returned after filling it up, so no debris gets inside. There is also a pressure release valve so when you are filling it, the pressure can escape through there so you can get the proper amount of propane in there. You can then locate the on and off valve. The LP regulator is right next to the on and off knob, which once a year you need to have checked out for leaks. The proper way to do it is check it with a monometer. What this does is measure the water column inches of propane coming into the coach. The proper reading would be right around eleven. The average person does not have this device. So what you can do to check for leaks is turn the system on and get a spray bottle with soapy water in it and what you do is spray all your connections, what you are looking for at this point is if anything bubbles up, if you start to see some bubbling that means that there is a leak and needs to be tightened up, fixed, or replaced. If there is a leak on any connections you may want to tighten it or take it in. So check out this RV tutorial to learn how to maintain the LP gas system on your RV.