I have an inline control valve that is not opening and I cannot determine the manufacturer or model to get replacement parts. I would appreciate any assistance identifying the valve or a replacement diaphragm.
The valve will not open to allow water to flow to the zone. All other zones operate and I have swapped the solenoid from another valve, and the other valve operates with the swapped solenoid. The problem valve will not operate with either solenoid. Therefore, I assume the controller and solenoid are good and it's the diaphragm that is the problem.
The valve is about 23 years old and has no manufacturer name or model stamped on the body. The solenoid does have Richdel stamped on it. The bonnet has 8 screws, a bleeder screw, flow adjuster and two steel plates under the screws. It is black in color. From viewing valves online I'm guessing its a Richdel, Hardie or Irritrol. Really need some help, I don't want to replace entire valve. I have attached a photo. Thanks