valve not stopping water
I have to begin by saying I'm new to this sprinkler repair stuff. I just replaced my timer, then noticed some leaks in the system. I dug them up and they are some old orbit drain valves. They're draining water constantly. So I replace both drain valves and one still "leaks". So I replaced the control valve to the line, which had just started leaking also. That did not fix the problem. Any ideas?