We had two households on one well pump. We just added a third line to the pump for another household. the pvc runs uphill about 500 feet. We got everything together, but no water comes on when we turn faucet on. we have checked and all pipes are open. When we check the well, the system indicates the pressure is holding (no fluctuation). Is this air in the line, or could our neighbor have purposefully blocked the pipes (he wasnt happy about the addition of another household. The other two households are receiving water fine.