Originally Posted by VaughnB
When I hooked to city water, the tank overflowed. I read on an earlier post, that there is a shutoff to bypass the tank/pump
You might try to find that post. Iíve read about 1M posts here with no sign of that. Itís a check valve in your pump thatís not holding pressure. Some people install their own inline check valve but Iíve never heard of a pump bypass.