Sally from Pismo Coast Maintainence gives us the RV Tip of the Day...It has to do with those propane tanks on your RV. The tanks have a float in them, and particuarly on the older tanks, the floats get stuck, which doesn't allow for propane to flow in or out of the tank. Sally said the answer is just to drop the tank on the ground or concrete...it doesn't take much, but it frees up the float and lets the propane flow...And, it's safe...