The I-40 rotor has an optional opposing nozzle, indicated by the model number ending in -ON. The adjustment instructions for the opposing nozzle model are listed separately from the non-opposing nozzle model.
All I-40 group adjustable heads are preset to approximately 180°. The I-40 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
All I-40-ON models are 360° ONLY. There is no arc adjustment. For less than 360° use I-40-ADS.
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.