From my numbers for my IntelliFlo VF, with solar off I have 1500 RPM with around 25 GPM at 4-5 PSI (9-12 feet) while at I have 3000 RPM with around 70 GPM at 18 PSI (42 feet), but my pressures do not include suction head and I have somewhat long pipe runs (2" pressure-side; two 1.5" suction side).