You can goto a rental store and rent a valve finder. It traces the current in the ground to the valve. once you find it the diaphragm needs to be replaced.
Xpedient Irrigation Inc. is a locally owned company that delivers solutions to all your sprinker system needs.
We service both residential and light commercial customers.
We offer: Complete installations
All types of Repairs
Summer start-ups
Evaluation of coverage
Troubleshooting
Pressure loss
Vacuum breaker repair
Drip/Low-Pressure Irrigation Installation and Repair
and Much More!
If you would like free consultation or advice for your property, please feel free to contact us with any questions!
Call or email us now to schedule your summer-start up!
http://www.highlandsranch.com/class/display.html?id=3537