A sprinkler system can keep running while parts of your lawn miss out on water. Look for dry or soggy patches, weak spray, water pooling, or a noticeable change in your water use. These signs often point to a problem that is easier to address when caught early. A quick inspection while the system is operating can help you identify which zone or sprinkler head needs attention and decide whether a simple cleanup is enough or a repair is needed.
Uneven Coverage and Dry Patches
If one area of the lawn stays dry while nearby grass looks healthy, check how the sprinklers distribute water. A head may be pointed away from the lawn, set to spray too narrowly, or unable to reach the area. Walk through each zone while it runs and note where the spray lands. Also look for overspray onto paths, fences, or driveways, where water does little to help your plants.
Grass that turns brown in a defined strip or patch can reveal a gap in coverage. Compare the affected area with the positions and spray patterns of nearby heads. Before changing the watering schedule, confirm that the heads are working and aimed correctly. Adding more run time may waste water without fixing a blocked nozzle, damaged head, or layout issue.
Leaks, Pooling, and Soggy Soil
Water pooling around a sprinkler head, bubbling from the ground, or flowing after a zone shuts off can indicate a leak or valve problem. Check the system during operation and again a few minutes after it stops. Persistent wet spots, unusually soft soil, or water running down a slope may also point to a broken underground line or a head that is not sealing properly.
A leak can affect pressure across a zone, so several heads may spray weakly even if only one section of pipe is damaged. If you can safely access the controller, switch off the affected zone and observe whether the water continues to flow. Avoid digging without knowing where pipes and cables run. A qualified technician can locate the fault and repair it without unnecessary disturbance.
Blocked or Damaged Sprinkler Heads
A head that barely sprays, spits unevenly, or fails to rise may be clogged with soil or debris. Grass clippings and dirt can also collect around the nozzle and prevent it from turning freely. With the system off, clear loose material from around the head and inspect the nozzle for visible blockage. Follow the manufacturer’s guidance before removing or cleaning parts.
Look for cracked housings, tilted heads, missing nozzles, and heads that stay partly below the soil. A mower or foot traffic can damage or shift them, changing the spray pattern. If a head is broken or does not pop up after the area is cleared, it may need replacement. Check that the new head matches the system’s type and coverage needs.
Pressure and Controller Problems
Changes across an entire zone can signal a pressure or supply issue. Weak spray from multiple heads may follow a leak, a partly closed valve, or a problem with the water supply. Mist-like spray or forceful streams can also mean pressure is not suited to the installed heads. Compare zones and note whether the change affects one head, one zone, or the whole system.
If a zone does not start, runs at the wrong time, or stops too soon, check the controller settings and power supply first. Confirm the correct day, start time, and run duration, and look for an error indicator if the controller has one. If settings are correct but the system still behaves unpredictably, the controller, wiring, sensor, or valve may need professional diagnosis.
Inspect each zone while it runs, record the affected locations, and note any leaks, weak spray, or controller errors. Clear simple debris only when the system is off, and avoid altering settings to compensate for a fault. If the cause is unclear or water keeps flowing, contact Sydney Sprinkler Co to discuss an inspection and repair.