What is a typical operating range for rotor heads?

• A. 15-50 feet radius, 45-50 psi
• B. 5-15 feet radius, 20-30 psi
• C. 100-150 feet radius, 60-80 psi
• D. 1-5 feet radius, 5-10 psi

Answer: (A)

Rotor heads are designed to cover moderate to larger areas and need enough pressure to push water through the rotor mechanism and nozzle to throw water farther. Because of that, a typical operating range lands in the ballpark of a 15 to 50-foot radius, with about 45 to 50 psi at the sprinkler head. This combination supports a reliable, uniform pattern without excessive misting or overspray, which can happen if the pressure is too low or the throw is too short.

The other ranges reflect situations you’d see with different spray types: smaller-radius heads typically operate at lower pressures and are used for closer targets, while very large radii or very high pressures aren’t common for standard residential rotor heads. So the 15–50 foot radius with roughly 45–50 psi is a representative, practical range for typical rotor operation.