All I-25 Ultra adjustable arc sprinklers are preset at approximately 180°. The I-25 can be adjusted from 50-360 degrees. Sprinklers may be adjusted with water on or off. It is recommended that initial adjustment be made before installation.
To Increase Arc
To Decrease Arc
Insert the hex end of the Hunter wrench into the nozzle-retainer/range-adjustment screw. Turn the screw clockwise into the stream of water to decrease the radius, or counterclockwise to increase the radius.
Where excessively wet or dry areas are a problem, the precipitation rate may be adjusted. Simply replace the existing nozzle with a larger one to increase or a smaller one to decrease the rate of precipitation.