R-VAN18 13 to 18 Adjustable Swivel Nozzle (10 ct.) Rain Bird R-VAN Adjustable Swivel Nozzles provide water efficiency and design flexibility. R-VAN Adjustable Rotating Nozzles feature rotary flow technology that consistently delivers water at a low precipitation rate, significantly reducing runoff and erosion. Standard spray nozzles with R-VAN adjustable rotary nozzles can reduce flow by up to 60% and improve water efficiency by up to 30%. Nozzle pattern and distance are easily adjusted by hand without the need for tools. Coarse wind resistant currents ensure efficient performance in harsh real world conditions. R-VANs large water droplets cut through the wind so water stays in the target zone without misting or fogging. A unique manual flush feature keeps nozzles free of dirt and debris even in extreme conditions. Features / Benefits Adjust arc and radius without tools. Color coded for easy R-VAN model identification Low precipitation rate reduces runoff and erosion Maintains efficient performance at high operating pressures without misting or fogging. Compatible with all Rain Bird spray body models plus a wide variety of risers and adapters. Matched precipitation rates across radius and arcs simplify the design process Coverage up to 22m, but when combined with Rain Bird 500000 Series Rotor matched precipitation MPR nozzles, irrigation designs from 13 to 35 ft. (13.1 m to 10 m) can be easily handled Operating Range Pressure Range: 30 to 55 psi (2.1 to 3.8 bar) Recommended Operating Pressure: 45 psi (3.1 bar) Spacing: 13 to 24 (4.0 to 24.0 ft) Adjustments: Arc and radius must be adjusted while the water is running