| 1 | Match the spray arc to the landscape | Use 90° for corners, 180° for edges, and 360° for open areas. | Common arc settings: 90°, 180°, 270°, and 360°. | Water should remain inside the planting area without spraying walls, paths, or buildings. | Reduce the arc or realign the fixed side of the nozzle if overspray is visible. |
| 2 | Set the spray radius | Adjust the radius so the stream reaches the planned coverage boundary. | Typical pop-up spray radius: approximately 2.4–5.5 m, depending on nozzle type and pressure. | Measure from the sprinkler head to the farthest consistent wetting point. | Turn the radius adjustment screw clockwise to shorten distance; turn it counterclockwise to increase distance, where supported. |
| 3 | Balance head-to-head coverage | Place or adjust sprinklers so each head reaches the next head or approximately 50–100% of the neighboring radius. | For a 3.0 m radius, spacing is commonly about 3.0–4.5 m, depending on wind and site conditions. | Use catch cups or small containers arranged in a grid to identify dry gaps and excessive overlap. | Correct spacing, radius, or nozzle selection instead of increasing run time alone. |
| 4 | Control the flow rate | Use matched-flow nozzles within the same irrigation zone whenever possible. | Small spray nozzles often deliver about 2–8 L/min; actual flow varies with arc, radius, and pressure. | Compare pressure and visible spray strength at the first and last heads in the zone. | Replace mismatched nozzles, clean clogged filters, or divide an overloaded zone. |
| 5 | Verify operating pressure | Operate within the nozzle’s rated pressure range and avoid excessive misting. | Many spray systems perform near 2.1–3.4 bar, or 30–50 psi; check the irrigation design specification. | Install a pressure gauge at the valve or test point while the zone is running. | Use pressure regulation where pressure is too high; inspect pipes, valves, and flow restrictions when pressure is too low. |
| 6 | Keep the nozzle and filter clean | Remove dirt, sand, grass clippings, and mineral deposits before making final adjustments. | A partially blocked nozzle can produce a reduced radius, distorted pattern, or uneven flow. | Observe the spray pattern for missing streams, fine mist, pulsing, or irregular distribution. | Shut off the water, remove the nozzle and filter if accessible, rinse with clean water, and reinstall securely. |
| 7 | Fine-tune runtime after adjustment | Adjust runtime only after arc, radius, pressure, and flow are correct. | A common starting point for turf is 10–20 minutes per cycle, then modify according to soil, weather, and catch-cup results. | Check soil moisture 75–100 mm below the surface and look for runoff or standing water. | Use shorter cycles with a soak period on compacted or sloped soil; reduce frequency during cool or rainy weather. |
| Practical target: After adjustment, the catch-cup volumes across the test area should be as consistent as possible, with no obvious dry strips, excessive runoff, or overspray. Recheck the system at the beginning of each irrigation season and after nozzle, pressure, or landscaping changes. |