Sizing Rotors and Valves for a 5,000 sq ft Lawn

For a flat, rectangular 5,000 sq ft area (40' x 125'), the number of Hunter PGP rotors and valves depends on water pressure and flow. With strong supply (70+ PSI, 15+ GPM), a minimum of 12 rotors on 3 valves (4 per valve) is possible but stretches capacity. Conservative design uses more zones with fewer heads each for better coverage and pressure stability. Always base layout on actual flow test at the point of connection.