The Hunter I-25 nozzle chart sets the wetted radius and the flow each rotor draws from the manifold. The I-25 is a 1-inch gear-driven commercial rotor with a 40 to 71 ft radius range, a 50 to 360 degree adjustable arc, and a 40 to 100 PSI operating range. Hunter's recommended band is 50 to 70 PSI. It is the workhorse for sports turf, parks, large residential lots, and any zone where a 3/4-inch rotor runs out of throw.

The rotor ships pre-set to roughly 180 degree arc with five standard nozzles in the box: #7 Orange, #10 Lt. Green, #15 Gray, #20 Dk. Brown, and #25 Dk. Blue. Nozzle choice is the primary lever for matching the rotor to the zone. Browse the full Hunter lineup on the Hunter category or the wider Rotors category.

Is there an I-25 low-angle nozzle chart?

No. Hunter publishes low-angle (12 degree trajectory) nozzles for the smaller I-20 and PGP Ultra rotor families, not for the I-25. If a low-trajectory pattern matters on an I-25 zone (windy site, low overhangs, near hardscape), step down one nozzle size from your radius-target pick. The smaller nozzle reaches less distance into the wind and keeps the stream tighter.

For zones that genuinely need a low-angle product, the I-20 is the right rotor and Hunter's I-20 Low Angle Nozzle Performance chart is the right reference.

How to read the chart

The I-25 is engineered for matched precipitation across nozzle sizes at a constant arc. You can mix nozzle sizes in the same zone as long as the arc is consistent. A 90 degree corner head and a 180 degree edge head, both running the #10 nozzle, deliver the same depth of water per hour to their footprints.

How to swap an I-25 nozzle (3 steps)

Tool required: the Hunter rotor adjustment key, the same flat-blade and hex tool used for arc adjustment on every I-series rotor. Keep it on the truck.

• Lift and lock the riser. Insert the flat blade end of the adjustment key into the keyhole on top of the nozzle turret. Turn 1/4 turn to lock, then firmly pull the spring-loaded riser straight up. Hold the riser with one hand while you work; releasing it lets the spring retract the riser into the body.
• Loosen the radius-reduction screw and pull the old nozzle. Use a flat-head screwdriver or the hex end of the adjustment key on the small screw on the front of the turret. Back the screw out 2 to 3 full turns; this doubles as the close-in spray break-up adjustment, and backing it off frees the nozzle. Grip the nozzle by the prongs and pull it straight out of the socket.
• Install the new nozzle and re-set the screw. Press the new nozzle into the socket with the number visible and the prongs facing up. Re-tighten the radius-reduction screw to a snug stop; do not over-torque, the screw is plastic-threaded. Release the riser and run the zone to verify the spray pattern.