Hello all...I have a weird situation. I installed a building along with approximately 90' of 1" water lines (underground) to the well pump. I have an aerator, pressure tank and booster pump at the well. The pressure gauge on the booster pump shows 60 psi. I have a cutoff valve under the building (it's elevated like a mobile home) that I have in the 'off' position. With the cutoff valve in the 'off' position, the pressure gauge holds 60 psi (or close) for days. Today, I turned the cutoff valve under the building to the 'on' position. Surprisingly (at least to me), there was just a very weak (really a drip) of water coming out of the kitchen faucet and no water out of the bathroom faucet. The toilet attempted to fill, but it was so weak I could lift the fill tube to make a "u" shape (if that makes sense) and it almost stops water from coming out (like it's gravity feed). I thought maybe the pressure gauge on the pump was wrong so I cut the pipe above the cutoff valve under the building and the pressure was sufficient to "hiss" and blow a pressurized stream of water as I cut it. I turned the valve on and water blew out of the line, confirming it has plenty of pressure. There are no other cutoff valves. What could be happening? I'm sure there was sand in the 90' of water lines coming in to the building, could that have plugged the faucets almost immediately? Could there be a leak in the wall? Seems like if there was a leak in the wall it would have been sufficient to cause water to come out by the baseboard or at least I could hear a hiss. I am totally lost on this. Any help would be greatly appreciated.