Whose recommendations are considered for sprinkler spacing as per the notes?

• A. Weather data
• B. Manufacturer's recommendations
• C. Soil tests
• D. Codes

Answer: (B)

Sprinkler spacing is based on the performance data published by the manufacturer for the exact head and nozzle combination. Manufacturers test and publish the throw radius, distribution pattern, and precipitation rate for each model, and they provide recommended spacings to achieve uniform coverage without excessive runoff or dry spots. Using these guidelines ensures the system matches the head’s capabilities and delivers even water distribution. Weather data affects when and how much to water, soil tests influence infiltration and water-holding capacity, and codes set general requirements; none specify the exact spacing for a given head. So the notes emphasize following the manufacturer's recommendations for spacing.