Hunter SRM-04 100mm Adjustable Gear-Drive Rotor Sprinkler with Nozzle Rack (4–9m Radius, 15mm BSP)

The Low Precipitation, Low Flow Rotor for Close-Range Applications

The Hunter SRM-04 Adjustable Gear-Drive Rotor is the most efficient choice for short-range applications where sprays would normally be used. As Hunter’s smallest rotor, the SRM bridges the gap between standard spray heads and larger rotors, allowing you to irrigate both small and large areas within the same zone. This flexibility reduces the number of zones required, lowers installation costs, and increases system efficiency.

Compact yet powerful, the SRM features a rack of six water-efficient nozzles, each clearly identified by flow rate for quick selection and easy installation. With an adjustable arc from 40° to 360° and a built-in radius reduction screw (up to 25%), you can fine-tune the spray pattern to keep water where it’s needed — not on driveways or footpaths. Hunter’s proven water-lubricated gear drive ensures long service life and quiet, reliable operation, while the heavy-duty riser seal and large filter screen protect against debris and leaks.

Ideal for residential lawns, narrow strips, and compact landscapes, the SRM delivers consistent, even coverage with a low precipitation rate of approximately 11 mm/hr — conserving water while maintaining healthy, green turf.

FEATURES

• Shortest-range rotor in the Hunter lineup – ideal replacement for spray zones
• Adjustable arc: 40° to 360° (part-circle and full-circle operation in one unit)
• Radius range: 4.0m – 9.4m, adjustable by up to 25%
• Six interchangeable nozzles with easy flow rate identification
• Through-the-top arc adjustment for quick setup
• QuickCheck™ mechanism simplifies arc verification
• Water-lubricated gear drive for long-term durability
• Heavy-duty pressure-activated seal prevents flow-by and leaks
• Optional check valve (field-installed) prevents low-head drainage

SPECIFICATIONS

• Model: SRM-04 (100mm pop-up)
• Overall Height: 170mm
• Pop-Up Height: 100mm
• Exposed Diameter: 30mm
• Inlet Size: 15mm BSP (½”)
• Radius: 4.0m – 9.4m (with nozzle selection)
• Flow Range: 1.4 – 13.7 L/min (0.08 – 0.82 m³/hr)
• Recommended Pressure Range: 170 – 380 kPa (1.7 – 3.8 bar)
• Operating Pressure Range: 140 – 700 kPa (1.4 – 7 bar)
• Precipitation Rate: Approx. 11mm/hr
• Nozzle Trajectory: 18°
• Warranty: 3 years