Quoted from "Wet_Boots" By the way, on some old Richdel valves, when you install a new solenoid, you want to remove the white plastic retaining ring before installing the replacement solenoid. That can make a difference in how well an older valve will open. Just wanted to say thanks for this helpful advice. It's much appreciated. Our sprinkler system had lost pressure at a few different stations, and I was ready to rebuild with new diaphragms I'd ordered, but then caught your post and thought I...
