Okay, here's my situation....

I recently had to move the pump in my basement to another section of the basement to accommodate some home renovations. The pump worked fine, everything was okay, it was just in an awkward location. It's now in the laundry room, and in order to move it, of course I had to cut the copper pipe leading away from it and disconnect the flexible pvc pipe leading into it. The pump isn't that old (about ten years or so, I guess) and it's small enough that I could just pick it up and carry it over to its new home. I then reconnected the copper and pvc pipes, making certain to fill the pvc pipe back up with water first. Then I unscrewed the bolt at the top which lets you pour water in and did exactly that until it spilled over. Then I put the bolt back on, plugged the pump back in, and it started, but the pressure gauge stayed at zero. I turned the pump back off after about 15 seconds for fear of wearing out the motor. I've repeated the last part, refilling with water over and over again with the same result.

The pump is connected to a shallow well outside about 20 feet away from the house. Everything worked fine before I moved it, so I've eliminated anything outside as the cause. I don't know if I shook something loose or what, and I'm reluctant to keep plugging the pump back in for fear of motor damage. Does anyone have any idea of what's going on?