no water coming out of faucets

I had that issue one time after TH sat up for a couple of months. It was something, maybe algae or dirt blocking the outlet of the water tank. I was able to remove the hose going from the tank to the pump and blow back into the tank and cleared the line. it may be a partial block since you do build up pressure eventually, but when you open a faucet and the pump starts pumping there is not enough water to supply the amount the pump is pumping.