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How Many Hunter I-40 Heads on 1" Line at 65 PSI, 10 GPM?

Water pressure ~65 PSI, 1" line to 1" valve, ~10 GPM flow. Wants Hunter I-40 with 1" inlet. Asks for formula to calculate heads per valve.

Pipe Is the Limiting Factor

Matt: "If you look at a hunter I-40 nozzle chart the lowest one will operate is about 10 GPM. Your valve will flow 25-30 GPM, but your 1" pipe is going to max out about 15-18 GPM. (You can push more through 1", but the pressure drop increases drastically.) So the most you can run is 1 head per valve."

With 4 GPM nozzles you could run 4 heads on 1" line. "In this case your pipe is the limiting factor."

Irrigation: Troubleshooting a Sprinkler Zone That Shows Active but Delivers No Water; Richdel Controller Flashing "FUS": Replace Solenoid on Indicated Valve; Rain Bird ESP-LX "Fault 4" Code: Zone Skipped; Sand in Sprinkler Heads: Source Identification; Why a Sprinkler Head Leaks When the System Is Off: Diaphragm Wear; Main Anti-Siphon Leaking: Redundant with Valve Anti-Siphons?; Weeping Sprinkler Heads: Low Head Drainage vs. Weeping Valve; Fixing Leaky Sprinkler Heads and Low-Pressure Zones; Valve Height Difference: 6 Inches Higher—No Problem; Fixing a Weeping Sprinkler Valve: Troubleshooting and Repair Steps

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