Rain Bird"s 22SA rotary sprinklers provide highly uniform water distribution and an increased radius range of up to 24 feet, so your grass will stay green all year round. The 22SA"s half-coverage pattern has a range of up to 24 feet. (View larger). At the same time, the sprinkler produces remarkably low precipitation rates of 0.6 inches per hour, reducing water use up to 30 percent. The secret is in the nozzle"s rotary multi-stream action. The water delivery is gentle enough for newly seeded areas and hillsides, yet covers more area than standard pop-up sprays. The extended throw also allows you to use fewer heads per zone to reduce system complexity. And the 22SA nozzle"s water droplets are larger than traditional sprinkler droplets, resisting windblown overspray. The 22SA is easy to adjust: simply use a standard slotted screwdriver to adjust the throw distance from 17 to 24 feet. Other features include a 6-inch pop-up height; a protected closed-case design that makes these sprinklers ideal for "creeping" grasses, sandy soil, and other harsh surroundings; and a water-lubricated rotating stream operation that"s quiet and maintenance-free. This version of the 22SA sports a half-coverage pattern; the 22SA is also available in full and quarter patterns.