Richdel Valve
I have no luck using an Irritrol Diaphram on a richdel. The center spindle on the Richdel is larger than the Irritrol, and the diaphram will not go on. I have to just replace the valve. This has been my experience with all richdel valves. They look the same, tops fit and work, but I am still looking for a replacement diaphram. Help me. No one else can.