Originally Posted by speedball1
Shunned opened up a new possibility. It could very well be that the initial surge of the pump would cause water hammer if the air chambers were water logged and needed recharging. Good thinking, outside the box, by shunned.
10 times in 45 minutes without opening or closing a valve would seem to indicate a leak that's causing the pump to cycle on and off. While recharging the air chambers may take the "bang" away shunned might just have gone directly to the cause. To test for a leak turn the pump off at the breaker box and, without running any water monitor the pressure gage. It should remain steady. If it drops then you have a leak in the pressure side of the system or a faulty check valve in the suction side that allows the pump to lose pressure and kick on and off. Good luck and let us know. Tom