[wingnut60]

The automatic changeover regulator works so that you don't run out of propane when one tank empties. The black lever should always be pointed toward the tank in use--when the tank the lever is pointed to, the indicator in the view sight will turn from green to red. At that point, you change the lever to the second tank. The indicator will go back to green. At this point, you know you have one tank empty and need to get it refilled. After refilling the first tank, reinstall and the lever will be on the second tank. Then you know you have a full tank and one that is being used from. What you don't want to have happen is, when the indicator turns red, you ignore it--you will then run out on BOTH tanks whether or not you move the lever.