Replaced Air Volume control on water tank and pressure gauge. Drained water tank prior to av replacement. Turned on pump. No water. Removed pressure gauge to prime pump.
Reservoir under gauge did not fill. Used about 10 gallons of water. What could the problem be? Do I have to rmeove pump from well to fix?

What kind of pump do you have?


Do I have to rmeove pump from well to fix?

Does that mean you have a submersible pump?