I have a Wel Flo pre pressurized pump and tank. It has started to make this clicking sound alot more than normal. In watching the tank pressure, I can see the clicks are the tank repressurizing. It will drop to about 30 then pressurize to about 55 (I'm assuming that's PSI). This seems to go on all the time and the sound is alot louder than I can remember it being even when we are not using water. Any thoughts?