I had an auto leveler installed when the pool was put in. It works well, when I backwash it comes on to refill pool. The overflow pipe drains off the water after heavy rains. I do turn it off now and again to check if the pool drops do to leaks. Have not had to use a hose to fill or pump it off. For winter I remove the valve (toilet float) and install a piece of pipe, return plug and blow the line out. Pour antifreeze in the pipe and tank, through in some pool noodles.