Black Hunter I-25 sprinkler with riser extended
Black Hunter I-25 sprinkler with riser extended
Sprinklers watering a broad lawn under blue sky
Sprinklers watering a broad lawn under blue sky
Selection of coloured Hunter I-25 sprinkler nozzles
Selection of coloured Hunter I-25 sprinkler nozzles
Black Hunter I-25 sprinkler with riser extended
Sprinklers watering a broad lawn under blue sky
Selection of coloured Hunter I-25 sprinkler nozzles

HUNTER I-25 GEAR DRIVE SPRINKLERS

Hunter I-25 Gear Drive Sprinklers for large turf irrigation. Sturdy construction supports a long service life. Automatic arc return restores the watering pattern if the turret is moved, and the non-strippable drive helps protect the mechanism. Colour coding makes nozzle sizes easy to identify, and the built-in check valve reduces drainage through lower heads after watering.

The Hunter gear drive adjustment tool is required for arc adjustment and is also used for nozzle installation and radius adjustment.

✓ Inlet: 25mm (1") BSP female
✓ Coverage: 11.9–21.6 metre radius across nozzle options
✓ Spray Pattern: 50°–360°
✓ Recommended Pressure: 250–700 kPa
✓ Flow: 13.6–120.2 L/min across nozzle and pressure options
✓ Pop-Up Height: 100mm

Hunter I-25 Gear Drive Sprinkler Specifications
Hunter I-25 Nozzle Performance Guide

More Information
Product Specifications
Black Hunter I-25 sprinkler with riser extended
HUNTER I-25 GEAR DRIVE SPRINKLERS
Black Hunter I-25 sprinkler with riser extended
Hunter I25 Gear Drive Pop-Up 4" Plastic (Radius 13.4m - 21.6m) SPHI25PL
$85.03 /each
Black Hunter I-25 sprinkler with riser extended
Hunter I25 Gear Drive Pop-Up 4" Plastic (Radius 13.4m - 21.6m) - BOX OF 12 SPHI25PLBQ
$938.73 /each
Hunter I-25 sprinkler with stainless steel riser and green nozzle
Hunter I25 Gear Drive Pop-Up 4" Stainless Steel (Radius 13.4m - 21.6m) SPHI25SS
$111.32 /each
Hunter I-25 sprinkler with stainless steel riser and green nozzle
Hunter I25 Gear Drive Pop-Up 4" Stainless Steel (Radius 13.4m - 21.6m) - BOX OF 12 SPHI25SSBQ
$1,228.97 /each

Hunter I-25 gear drive sprinklers for large turf irrigation. Its sturdy construction supports a long service life.

Automatic arc return restores the chosen pattern after the turret is moved, while the non-strippable drive helps protect the mechanism. The colour coding makes the different nozzle sizes easy to identify.

The I-25 provides an 11.9–21.6 metre radius across its nozzle configurations. Radius is the distance from the sprinkler to the outer edge of the watering pattern. Recommended operating pressure is 250–700 kPa.

The spray arc adjusts from 50° to 360°. The top adjustment screw lets you shorten the watering distance. Choose the nozzle for both watering distance and arc so sprinklers on the same zone apply water at similar rates.

The Hunter gear drive adjustment tool is required for arc adjustment and is also used for nozzle installation and radius adjustment.

The 100mm pop-up is available with a plastic or stainless steel riser. Both versions have a 25mm BSP female inlet and a 200mm retracted body height.

The built-in check valve holds back up to 3 metres of elevation, reducing drainage through lower heads after watering.

Five nozzle choices are supplied, with a 25° trajectory. The overall coverage and flow ranges include nozzle sizes beyond the five supplied.

Warranty: Five years.

Hunter I-25 Gear Drive Sprinkler Specifications
Hunter I-25 Nozzle Performance Guide

✓ Product Type and Application
Hunter I-25 Gear Drive Sprinklers.

✓ Dimensions and Connection
Inlet: 25mm (1") BSP female.
Pop-up height: 100mm.
Overall body height when retracted: 200mm.
Riser options: Plastic or stainless steel.

✓ Coverage and Spray Pattern
Radius: 11.9–21.6 metres across nozzle and pressure options. Radius is the distance from the sprinkler to the outer edge of the watering pattern.
Spray arc: 50°–360°.

✓ Pressure & Flow
Recommended pressure: 250–700 kPa.
Operating pressure: 250–700 kPa.
Flow: 13.6–120.2 L/min across the nozzle range.
See ‘Precipitation Rate’ below for how the arc setting affects the amount of water applied across the area.

✓ Nozzles and Performance
Supplied with 5 nozzle choices. The radius and flow ranges above include nozzle sizes that are not supplied with the sprinkler. The example below shows the supplied nozzle choices.
Trajectory: 25°.

Five supplied standard nozzles.
Example comparison at 450 kPa, before radius reduction:
7 Orange nozzle: 14.6 metre radius; 29.1 L/min.
10 Light Green nozzle: 16.2 metre radius; 43.9 L/min.
15 Grey nozzle: 17.4 metre radius; 56.3 L/min.
20 Dark Brown nozzle: 18.9 metre radius; 70.1 L/min.
25 Dark Blue nozzle: 20.1 metre radius; 93.1 L/min.

✓ Adjustment
The top adjustment screw lets you shorten the watering distance. Choose the nozzle for the required watering distance, then use the screw to shorten the radius as needed.

✓ Sprinkler Spacing
Spacing is the distance between neighbouring sprinklers.
For head-to-head coverage, each sprinkler throws water far enough to reach the next sprinkler. This overlap helps water the area between them evenly.
Use the actual watering distance after adjustment when planning the spacing.
A square layout places sprinklers on a square grid. A triangular layout uses staggered rows.

✓ Precipitation Rate
Precipitation rate describes how quickly water is applied across the area, measured in millimetres per hour.
For example, with the 7 Orange nozzle at 450 kPa, a 180° half-circle arc and sprinklers spaced 14.6 metres apart:
Square layout: 16 mm/hour.
Triangular layout: 19 mm/hour.
At the same pressure, the same nozzle uses essentially the same flow whatever the arc setting. A smaller arc concentrates that water over a smaller area.
Different nozzle sizes can help balance watering between smaller and larger arcs, but they also change the watering distance. Choose nozzles that maintain head-to-head coverage; changing nozzle size alone may not suit an existing layout.
Where suitable nozzle combinations cannot provide similar watering rates, put sprinklers with different watering rates on separate zones so their run times can be set independently.

✓ Operation and Servicing
The drain check valve holds back up to 3 metres of elevation.

✓ Warranty
Five years.

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