In a square sprinkler layout, why must heads be placed closer toward the center?

• A. Aesthetics
• B. To achieve adequate coverage
• C. To reduce noise
• D. To fit the layout

Answer: (B)

In sprinkler layouts, the key is making sure every part of the area gets watered by overlapping spray patterns. The farthest point in a square layout is often near the center, especially if heads sit toward the outer edges. By moving heads closer to the center, you reduce the maximum distance from any point in the area to the nearest head, so the spray radius from the heads covers the entire space more reliably. This ensures uniform wetting and avoids dry spots, particularly in the center where coverage tends to be weakest if heads are placed too far apart or near the perimeter.

So the reason this is best is that it directly supports adequate, evenly distributed coverage across the square, leveraging overlap between spray patterns. Aesthetics, noise, or simply fitting the layout don’t address the actual water distribution needed to keep the area uniformly watered.