Rain Bird U-8F dual-orifice spray nozzle - 360° full-circle - 1.7 to 2.4 m radius

Rain Bird U-8F dual-orifice full-circle spray nozzle

The Rain Bird U-8F is a high-efficiency dual-orifice spray nozzle with a fixed 360° full-circle spray pattern and a radius of 1.7 to 2.4 m. It is designed for automatic irrigation of small lawns, central lawn sections and landscaped areas where water needs to be distributed in every direction around the sprinkler.

As part of the Rain Bird U-Series, the U-8F features two separate spray openings. These distribute water both close to the sprinkler head and across the outer section of the spray pattern, helping provide more uniform irrigation over the entire circular area.

360° spray coverage for central lawn areas

Unlike quarter-circle or half-circle nozzles, the Rain Bird U-8F waters a complete circle around the spray body. This makes it particularly suitable for sprinklers positioned within a lawn rather than along its edges. The fixed spray pattern provides consistent full-circle coverage without requiring manual arc adjustment.

The spray radius varies from 1.7 to 2.4 m depending on water pressure. At the recommended operating pressure of 2.1 bar, the nozzle reaches approximately 2.4 m. Its 10° trajectory produces a relatively low spray pattern, while the integrated stainless steel adjustment screw allows the radius to be reduced when necessary.

Dual-orifice design for improved close-in watering

The U-8F combines a main spray opening for the outer watering area with an additional opening that directs water close to the sprinkler head. This design helps overcome uneven watering near the spray body, where conventional spray nozzles may leave dry patches.

By improving close-in coverage, the dual-orifice design supports more uniform water distribution across the entire spray circle. According to Rain Bird, U-Series nozzles can reduce water consumption by up to 30% compared with conventional spray nozzles under suitable system conditions. Actual savings depend on irrigation design, water pressure and watering schedules.

Installation and combination with other Rain Bird nozzles

The Rain Bird U-8F is designed for installation on compatible Rain Bird spray bodies and shrub adapters, including models from the Rain Bird 1800 Series. Where water pressure exceeds the recommended nozzle pressure, pressure-regulated spray bodies can help maintain consistent irrigation performance.

For complete lawn coverage, the U-8F can be combined with matching U-8H half-circle and U-8Q quarter-circle nozzles. Because the full-circle nozzle waters a larger area, it requires a higher flow rate than the other models. Always account for the available water supply and provide adequate overlap between sprinkler patterns when designing your irrigation system.

Technical specifications and dimensions

• Manufacturer: Rain Bird
• Model: U-8F / U8F
• Series: Rain Bird U-Series
• Product type: High-efficiency dual-orifice spray nozzle
• Spray pattern: Fixed 360° full-circle
• Spray radius: 1.7 to 2.4 m
• Operating pressure according to performance chart: 1.0 to 2.1 bar
• Optimum operating pressure: 2.1 bar
• Flow rate: 2.8 to 4.0 l/min
• Hourly water consumption: 168 to 240 l/h
• Spray trajectory: 10°
• Spray openings: 2, for close-in and outer coverage
• Radius adjustment: Stainless steel adjustment screw
• Spray angle: Fixed, not adjustable
• Compatibility: Rain Bird spray bodies and suitable adapters
• Recommended spray bodies: Rain Bird 1800 Series, pressure-regulated PRS models for higher supply pressure
• Applications: Central lawn areas and circular landscaped sections
• Package contents: 1 Rain Bird U-8F dual-orifice spray nozzle

Frequently asked questions about the Rain Bird U-8F

What is the spray radius of the Rain Bird U-8F?

The radius ranges from 1.7 to 2.4 m depending on operating pressure. At 2.1 bar, the nozzle reaches approximately 2.4 m.

Can the 360° spray angle be adjusted?

No. The U-8F has a fixed full-circle spray pattern. Half-circle and quarter-circle versions are available separately.

How much water does the U-8F use?

The flow rate ranges from 2.8 to 4.0 l/min, equivalent to approximately 168 to 240 litres per hour.

Why does the U-8F have two spray openings?

The additional opening directs water close to the sprinkler head, improving close-in coverage and helping reduce dry patches around the spray body.

Where should a full-circle nozzle be installed?

The U-8F is particularly suitable for central lawn areas where the sprinkler needs to distribute water evenly in every direction.

Can the U-8F be combined with other U-Series nozzles?

Yes. The U-8F can be combined with appropriately selected U-8H and U-8Q nozzles. Consider their different flow rates when calculating the total water demand of each irrigation zone.