I have a deep well pump hooked to a flotec bladder tank. The problem is that the pump doesn't seem to be priming the tank. No water is going into the tank, and the pump won't stay running unless I cut off water to the house with the valve next to the tank, at which point the pump won't shut off, but the tank still won't prime. I don't have any water to the house unless I hold the switch to keep the pump on, and then it's still low pressure.