To repair a leaking sprinkler valve, first turn off the water and power, then open the box and unscrew the solenoid valve, disassemble the valve and clean all of the components. If cleaning the valve does not solve the leak, replace the solenoid valve.Continue Reading
Many valves leak because of small debris that gets trapped in the solenoid valve. A thorough cleaning of the interior components solves most leaks.
Turn off the electricity to the system as well as the main water valve to the sprinkler system.
Access the valve by opening the lid to the sprinkler system and cleaning out the mud and excess water. Twist and pull out the valve from the box.
Push down on the spring-loaded plunger on the solenoid. If it sticks, the solenoid should be replaced. Do not apply any lubricant.
Unscrew the valve lid and gently remove it, taking care not to drop the spring.
Carefully clean the white ports, the diaphragm and seat. Replace the diaphragm if it is cracked. Turn on the water to flush out the pipes before re-installing the valve.
Carefully reassemble the same way it was disassembled. Take care not to strip any screws.