I suggest you make the subject of your post indicative of what you want to ask, so you will get responses from people who know the awnser. I only knew how to awnser the question of your subject.

: I have a waterpump that pumps water from a cistern. Each time the water is turned on the pump
: : turns on and shuts off constantly until the pressure builds back up. It doesn't continuosly run like
: : it should. I replaced the pressure switch but that didn't help. I was wondering about the air pressure
: : in the tank and if it may be related....????

: : Thanks,
: : Greg