Zone 1 continuously on while other zones water
I'm troubleshooting an issue with what I believe to be a valve issue. Whenever I manually or automatically cycle the sprinklers, Zone 1 tends to steal all my pressure and continuously waters even when I try to skip that zone. The other zones I want to irrigate work, but with a significantly lower water pressure because Zone 1 is always on.
I pulled the valve for Zone 1 out and noticed that the diaphragm immediately disconnected from the top half. I'm not sure it is supposed to do that and wonder if I need to replace the valve or just the diaphragm.
Any suggestions?
Greg