Moved into an older home a couple years ago with an existing sprinkler system. It has never worked correctly and I am trying to get the system back into shape. Just replaced the backflow valves and got the system to partially work but can not leave the water and the timer on. It appears that one of the valves is stuck open or partially open which allows one of the stations to run even when the station is off. I know that I need to replace the station valve but I can't find the damn thing.
The system has five stations and I have only been able to locate the controls for three of the stations. All five have been buried and there is no plot of where to locate them. The three that I have located were in different areas and not near the areas being serviced. I can only guess as to where the remaining two are. I am on a large cul-d-sac lot with the sprinkler covering the entire lot.
Does anyone have a suggestion on how I can find the remaining two valves without destroying the entire yard in the process? I found the third valve when digging up and replacing one of the flower beds. Oh yes, the damn power cord for the system is also buried under the patio.
PS: Had the same problems with the sewer clean out and the main water line coming into the house. Paid a very high price for the plumber to find those under emergency conditions.