5/6/2013 5:05 PM
If it is not the $17 o-ring on the pickup tube, it might be the relief valve inside the tank is opening prematurely. Sometimes this gets full of crud and will leak by. You can pull it from inside the tank, disassemble then reinstall to check. As long as your pump is working, the only way you won't have pressure is if it is bypassing somewhere. Hence the relief valve.