Quick answer: A sprinkler valve that keeps running may be held open by debris, a damaged diaphragm, a solenoid or bleed mechanism that is not seated correctly, or an electrical/controller problem that continues sending power to the valve.
First determine whether the problem is hydraulic or electrical
If the zone keeps running after the controller is turned off, the valve itself may not be closing. If the controller is still commanding the station on, troubleshooting should begin with the schedule and electrical circuit.
Common valve problems
- Debris preventing the diaphragm from sealing
- Damaged or worn valve diaphragm
- Loose or failed solenoid
- Manual bleed left partially open
- Controller or wiring fault
Do not ignore a valve that will not close
A continuously running zone can waste significant water and may create pooling or landscape damage.
See our irrigation valve repair service and sprinkler system shut-off troubleshooting guide.
