Rain Bird® R-VAN Adjustable Rotary Nozzles provide water e ciency and design ex- ibility. R-VAN Adjustable Rotary Nozzles feature rotating stream technology which uniformly delivers water at a low precipita- tion rate, signi cantly reducing runo and erosion. Retro tting standard spray nozzles with R-VAN Adjustable Rotary Nozzles can reduce ow by up to 60% and improve water e ciency by up to 30%. Nozzle spray pattern and distance are easily adjusted by hand with no tools required.