Question
I move to 10 years old house. There is 4 stations sprinkler for the lawn. Everything work well until 2 days ago, I found out my lawn was soak then I saw the water leaking from 6 sprikler head of station 3. I went to check in the valve box, I heard water running which I think this station didn't turn off by the control box. I changed all soleniods but still cannot turn off that station. What else that I can do to fix this problem? Now I just shut off the valve that feed outside the house. Thank you for your help.

Answer
Try adjusting the valve.  There is a knob on top of the valve that is the flow control.  Open it all the way, then close it all the way, counting the turns.  Then open it back up half the number of turns.  If this doesnt work, you may need to dissassemble the valve and clean it out.  Be careful not to damage or loose any of the parts.