Have been looking into a 7 series to replace my 17yr old WF versatec unit. Open loop pump and dump system. My question is with the 7 series running constantly will my electric bill go up because my well pump will be running constantly? Will my pump burn out because of this? Would I be better off with a 5 series? Or replace my well pump? I do not know if my well pump is variable speed or not as I just bought this house.