Brand: Hunter Industries SKU: I40-04-SS-ON
Product Overview
The Hunter I40-04-SS-ON is the 4-inch opposing-nozzle version of the I-40 commercial rotor. Unlike the standard adjustable-arc I-40, this ON model is designed specifically for full-circle operation. Primary and secondary nozzles are positioned on opposing sides of the rotating turret so the streams travel in opposite directions, improving mid-range and close-in water distribution while the rotor completes its 360-degree rotation.
The rotor includes a stainless-steel riser, factory-installed drain check valve, 1-inch female NPT inlet, and the I-40 non-strippable drive mechanism. Hunter publishes a radius range of approximately 52 to 76 feet and flow from 13.0 to 33.7 GPM for the opposing-nozzle I-40-ON platform, depending on the selected nozzle set and operating pressure. Recommended and operating pressure is 40 to 100 PSI, with a standard nozzle trajectory of 25 degrees. The current Hunter specification builder identifies six supplied nozzles for the 4-inch stainless opposing-nozzle model.
The full-circle opposing-nozzle configuration is intended for broad turf areas where balanced 360-degree coverage is required. The non-strippable drive helps protect the rotor if the turret is turned against its normal direction. A thick rubber cover and stainless riser support use in athletic, municipal, commercial, and other demanding landscapes. The standard check valve is designed to hold back up to 15 feet of elevation to reduce low-head drainage.
Key Features
- 4-inch pop-up with stainless-steel riser
- Full-circle opposing-nozzle design
- Primary and secondary streams rotate in opposite directions
- Non-strippable, vandal-resistant drive mechanism
- Color-coded nozzle options
- Standard drain check valve for up to 15 feet of elevation
- 1-inch female NPT inlet
- Approximate 52- to 76-foot radius range
- Approximate 13.0- to 33.7-GPM flow range
- Designed for large full-circle turf applications
Common Uses
- Athletic fields and stadium turf
- Parks and broad municipal landscape areas
- Large commercial lawns requiring full-circle coverage
- Replacing a compatible I-40 opposing-nozzle rotor
Compatibility and Installation Notes
- This is the full-circle opposing-nozzle model, not the adjustable-arc I-40-04-SS.
- Select the nozzle pair according to required radius, flow, spacing, and available pressure.
- Use a compatible 1-inch swing joint or threaded connection.
- Install level with finished grade and provide clearance for the full 4-inch pop-up.
- Confirm the irrigation zone can supply the selected combined nozzle flow at the required pressure.
- Confirm nozzle-package contents if a specific factory nozzle configuration is required.
Frequently Asked Questions
What does ON mean in the model number?
ON identifies Hunter’s opposing-nozzle I-40 model, which uses primary and secondary nozzles on opposite sides of the turret for full-circle watering.
Can the I40-04-SS-ON be adjusted to a part-circle pattern?
No. This model is designed for 360-degree full-circle operation. Choose the standard I-40-04-SS for adjustable 50- to 360-degree coverage.
Why are two nozzle streams used?
The opposing streams improve close-in and mid-range distribution while the rotor waters the full circle.
Why Buy from Big Frog Supply?
Big Frog Supply carries Hunter I-40 rotors, opposing-nozzle models, replacement nozzles, swing joints, valves, and commercial irrigation repair components.
