Symptoms
- Head stays raised even when the zone is off
- Head is a tripping or mowing hazard sticking up
- Head moves stiffly when pressed down by hand
Likely causes
- CommonDirt or debris inside the head housingSand and soil can work into the riser mechanism and prevent smooth retraction.
- CommonBroken or weakened internal springThe spring that pulls the riser back down can wear out or break over years.
- PossibleCracked or damaged head housingImpact from a mower or foot traffic can crack the housing, causing it to bind.
What to do
- Turn off the water to that zone before working on the head.
- Unscrew and remove the head's internal riser assembly per the model's design (many pull straight up after removing a cap).
- Rinse the housing and riser thoroughly to remove dirt, sand, or debris.
- Check the spring for visible damage or lack of tension, and replace the internal riser assembly if the spring seems weak.
- Reinstall the cleaned or replaced riser and test the zone to confirm it now retracts fully when the water shuts off.
- If the outer housing is cracked, replace the entire head rather than just the internal parts.
Tools and parts
- Screwdriver
- Small brush (for cleaning debris)
Sprinkler head riser/internal assemblySearch: “sprinkler head riser replacement”
Replacement pop-up sprinkler headSearch: “pop up sprinkler head replacement”
When to call a pro
An irrigation technician can quickly replace multiple stuck heads if this is happening across several zones.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.