Oh, just thought. Your well will have foot valve (non-return valve) on
the bottom of the pipe that goes into the well. This too may be
leaking. It would be a jolly god thing if you dragged the well pipe
up and replaced this valve. If it leaks and the water drains out of
the pipe the pump may run dry. (ie with no water in it) Some pumps
are water lubricated and don't like this, it buggers them up in short
odds.