I have seen the Pumpstop a few times, and it is a good idea. It only works on above ground type pumps, as I don’t think there is a way to attach it to a submersible. And it doesn’t say in the specs, but if I remember right the temperature that causes it to shut down the motor is 110 degrees. In my area and many areas of the south, the well house gets to 110 on many days, which would be a problem with a Pumpstop. Correct me if I am wrong.