Hunter I-25 Ultra 100mm Adjustable Gear Drive Sprinklers with Nozzle Rack (25mm BSP) 

The Hunter I-25 Ultra is a rugged, high-performance gear drive sprinkler designed to excel in commercial and large residential irrigation systems. Built for power, efficiency, and reliability, the I-25 covers a robust watering radius of 11.9 to 21.6 metres, making it the go-to solution for expansive turf areas, parks, sports fields, and heavy-use landscapes.

Crafted for durability, the I-25 is available in both plastic and stainless steel riser models for maximum strength in challenging environments. Its automatic arc return and non-strippable drive mechanism protect against damage from vandalism, while the built-in check valve prevents low head drainage, conserving water and reducing liability. With a wide range of 11 nozzle options (#4 to #28), users can tailor flow rates and spray patterns for precise irrigation performance.

The I-25 is as versatile as it is tough, offering part- and full-circle adjustment (50° to 360°) in a single model for maximum design flexibility. The slow, water-lubricated gear drive ensures long-lasting smooth operation, while the QuickCheck™ arc mechanism simplifies on-site adjustment and maintenance. Backed by Hunter’s 5-year warranty, the I-25 delivers day-in, day-out reliability for professional-grade irrigation.

FEATURES

• Arc setting: 50° to 360° with automatic arc return
• Factory-installed rubber cover for safety and durability
• Through-the-top arc adjustment and QuickCheck™ mechanism
• Water-lubricated gear drive for long service life
• Choice of plastic or stainless steel risers
• Available with reclaimed water ID and high-speed models
• Built-in check valve standard
• 11 high-performance nozzle options (#4 to #28)
• Warranty period: 5 years

SPECIFICATIONS

• Radius: 11.9 to 21.6 m
• Flow rate: 0.82 to 7.24 m³/hr (13.6 to 120.7 L/min)
• Recommended/Operating pressure: 2.5 to 7.0 bar (250 to 700 kPa)
• Precipitation rate: ~15 mm/hr
• Nozzle trajectory: 25°
• Inlet size: 1" BSP
• Pop-up models: 100 mm (I-25-04), 150 mm (I-25-06)
• Exposed diameter: 5 cm