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85 PSI, 20 GPM: Can Run 10 Rain Bird Pop-Ups? Depends on Nozzles

Each head needs a nozzle (pattern + distance). At 85 PSI, a 12H (12ft, 180°) uses ~2 GPM → 10 heads = 20 GPM (OK). A 15F (15ft, 360°) uses ~4 GPM → only 5 heads. Check Rain Bird nozzle chart for your layout.

Irrigation: Spring Startup: Orbit 5-Zone System Not Responding to Controller; Why a Sprinkler Head Leaks When the System Is Off: Diaphragm Wear; Calculating Sprinkler Heads Per Zone for a Well System with 20-25 GPM; Main Anti-Siphon Leaking: Redundant with Valve Anti-Siphons?; Evaluating a Sprinkler System Estimate: Hunter vs. Mixed Brands; How Many Hunter I-40 Heads on 1" Line at 65 PSI, 10 GPM?; Weeping Sprinkler Heads: Low Head Drainage vs. Weeping Valve; Why Sprinkler Heads Don't Retract After Watering; Fixing Leaky Sprinkler Heads and Low-Pressure Zones; Weeping Sprinkler Head: Valve Seat or Diaphragm Issue

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