I'm pretty inexperienced with sprinklers other than adding sprinkler heads and replacing them. I have a Hunter sprinkler system and over the past 2 years I've had 1 head leaking but it never looked as if the head was the problem. Finally after turning on and off the main water supply valve to prevent the sprinkler head from leaking when not in use, I needed to activate the system and when doing so, I could hear the 1st valve in my 3 zone system attempting to activate but the sprinkler heads in z...
