The Rain Bird 18RNVAFPRO high efficiency rotary nozzle offers water savings of up to 30% over a standard pop-up spray nozzle. It covers a distance from 13-18 feet with a 45 to 270 degree adjustable watering pattern. Rotating streams of large water droplets reduce runoff and provide uniform coverage, even in windy conditions. The 18RNVAFPRO can replace your current pop-up half and quarter pattern spray nozzles to start saving water. To clear debris that may block part of the nozzle simply pull up the nozzle while water is running, and the debris will be flushed out.