Locate the Irrigreen Digital Sprinkler Head that you would like to replace the nozzle of.
Lift the green cap so the neck riser comes up. With one hand holding the neck riser, unscrew the green cap (about 4-5 counterclockwise turns) until it easily lifts out.
With the nozzle removed, check the filter below and clean any debris. Hand tighten your new nozzle until it is snug.