Well pump starts with a BANG!
My well pump usually - but not always - starts with a major BANG! We had a new Goulds 7gpm pump installed a year ago. Several months later the water would stop flowing for a second, as the pump took too long to cut in after the low pressure trip point was reached.
No air is getting into the system. The well pump is about 350 feet down.
I called in the plumber that replaced the pump. He changed out the contacts on the pressure switch, which was operating normally (40-60 psi on-off). Made no difference. Then he bled air from the tank. Lots of air. After that the water flow was continuous, but when the pump starts up, the system bangs like it has been hit by a sledgehammer. I also noticed that when the pressure switch trips on and power goes to the pump for 2-3 seconds before the system begins to re-pressurize. Is that normal?
He then replaced the check valve. It made no difference with regard to the initial BANG (which happens about 75% of the time) but now it rattles like hell while the system re-pressurizes.
Any expert insights would be appreciated.
Fred