I was able to get the sprinkler system line repaired and now I have a valve stuck open. I know I had to do this many years ago but I don't remember the details. I just tried unscrewing the cap for the valve in the valve box and much of it came apart, but I wasn't sure what to do with it at that point. So, I just put it back together and it seemed like it worked! For a few minutes anyway, then it clogged again. I guess I'll just go open it up again.
When I unscrew the assembly, the top of the valve come off and I see a black membrane with a tiny little metal tube in the center. Am I supposed to disassemble this further to get to what's underneath the membrane? I don't remember, and I don't want to damage the membrane by doing something it's not intended to do. Does it just pop off with a flat screwdriver? I'm tempted to try, but I won't use much force. I don't want to break the valve because then I absolutely would have to have someone come out to repair it.
Any thoughts?
Thanks! John