The Professional Series Spray Head is ideal for use in residential and commercial landscapes and handles the most intricately designed, high maintenance areas with ease. The spray head is easy to adjust even when the water is on. The pattern adjusting nozzle, allows easy water control and spray direction. It also features an anti-drain check valve for keeping the water from draining onto sidewalks, creating slippery hazards or wasting water. The Professional Series Spray Head offers a co-molded, pressure activated wiper seal that stops excessive flow-by and cleans the stem upon completion of watering.