I'm new to having a well and I just bought a house with one. Problem is our pressure switch keeps coming on and off really fast when we run some water. I knew the previous owner messed with the adjustments on it without knowing what they were doing. So I replaced the pressure switch and it still does the same thing. I checked the pressure tank and it didn't have any pressure. I put air in it up to about 30 lbs and waited a while and it didn't hold the air. So I bought a new pressure tank. Still having the problem. The moment I run water the switch just goes crazy on and off. Though according to my pressure gauge the pump shouldn't even be on. And the odd thing is when I put the new pressure gauge on it worked even worse then the one that had been adjusted. So I had to put the old one back on.