Water around a rotor can come from several locations. Correct diagnosis depends on whether the leak occurs while the zone is running, immediately after shutdown, or long after the system should have drained.
Leak while running
A worn top seal may create a small bubble around the riser or a severe geyser.
Leak from below the head
- Cracked nipple
- Punctured swing pipe
- Leaking swing elbow
- Damaged CRE or CRT
- Cracked zone line
Water after shutdown
A low head may drain water remaining in the lateral line. A Hunter I-20 check valve may help in suitable applications.
Water long after shutdown
If the system has had time to drain and the head continues leaking, the irrigation valve may be seeping because of debris, diaphragm wear, or internal damage.
Frequently Asked Questions
Why does my rotor bubble around the top while running?
Why does one sprinkler leak after shutdown?
How can I tell whether the valve is seeping?
Professional Irrigation Service
Need help diagnosing your sprinkler system?
Hunter HydroTech provides residential and commercial irrigation repair, pump-system service, valve diagnosis, controller troubleshooting, backflow service, revamps and seasonal maintenance throughout Southeast Michigan.