Quick answer: A sprinkler head that leaks after a zone shuts off may be draining water from higher piping, but persistent flow can also point to a valve that is not closing completely. The pattern and duration of the leak help distinguish normal low-head drainage from a valve problem.
When drainage is normal
On sloped properties, water left in lateral piping can drain through the lowest head after the valve closes. This usually slows and stops after the trapped water leaves the zone.
When the valve may be the problem
If water continues for a long time or never really stops, the zone valve may be leaking internally because of debris, diaphragm wear or another closing problem.
What to watch for
- How long the head continues leaking
- Whether the same head leaks every cycle
- Whether the valve box stays wet
- Whether the zone ever fully depressurizes
See our irrigation valve repair information and valve troubleshooting guide.
