I'm working with a circuit valve at our church. It's what I call a "hydro-valve" (don't know proper term for it).

The valve comes off our pump, and water pressure chooses continous progress on valve. You shut the pump off, and the valve increases one notch. What is the right term for these valves???

Our problem is that we have 3 circuits. For some reason, our valve is a four position unit. One of the circuits is blocked off by a plug in the pipe.

Naturally, this one position is causing us a problem. When the pump is on the blanked off circuit, it causes back pressure. Over a 30 minute cycle, this must not be good for the pump.

What is my best course of action on this? Got to a three position valve (if there is one)---or what????