I went ahead and bought a new one because I know this one is at least 5 years old. Probably closer to 8 when looking at some of the paperwork left by the previous owners of the house. It does make a humming noise after removing it from the piping, but it doesn't spin the shaft at all. I'd like to use convert it to a pump to remove water from my pool.....I have everything I need, except for the damn thing to run. Any advice??????