This amateur would appreciate any help. In general terms, I have a 6 zone system for my lawn. I've had 7 years of maintenance free satisfaction. This spring, two of my zones have started to ooze water out of one head each (at the lowest locations) after the cycle shuts off. It "oozes" for up to 5 minutes after the cycle and the water authority has given me a warning. I have replaced both zone valves, both heads, and both nozzles with no luck. About the same time the spring, I had to dig up/repair a 1" pipe that had cracked--maybe I allowed debris in?