Rain Bird U-8H dual-orifice spray nozzle - 180° half-circle - 1.7 to 2.4 m radius

Rain Bird U-8H dual-orifice half-circle spray nozzle

The Rain Bird U-8H is a high-efficiency dual-orifice spray nozzle with a fixed 180° half-circle spray pattern and a radius of 1.7 to 2.4 m. Designed for automatic lawn irrigation, it is particularly suitable for straight lawn edges, landscaped borders and narrow garden areas alongside paths, patios and walls. Its half-circle pattern directs water to one side of the sprinkler, helping keep irrigation within the intended area.

As part of the Rain Bird U-Series, the U-8H combines two water streams to improve distribution across the spray pattern. One stream reaches the outer watering area, while the additional opening delivers water close to the sprinkler head.

Dual-orifice technology for improved close-in coverage

The distinctive feature of the Rain Bird U-8H is its dual-orifice design. Conventional spray nozzles may leave areas immediately around the sprinkler with less water. The U-8H addresses this by providing an additional stream specifically for close-in watering.

This helps reduce dry patches near the sprinkler body and supports more uniform irrigation along lawn borders. According to Rain Bird, U-Series nozzles can reduce water use by up to 30% compared with conventional spray nozzles under suitable installation conditions. Actual savings depend on system design, pressure and watering schedules.

Fixed 180° spray pattern for straight lawn edges

With its fixed 180° spray angle, the U-8H is designed for sprinklers positioned along straight lawn boundaries. The nozzle distributes water in a semicircle, making it useful where grass borders a walkway, driveway, patio or garden bed.

Its spray radius varies with operating pressure. At 1.0 bar, the radius is approximately 1.7 m, increasing to 2.4 m at the recommended pressure of 2.1 bar. The 10° trajectory creates a relatively low spray pattern, while the stainless steel adjustment screw allows the radius to be reduced when required.

Compatible with Rain Bird spray bodies

The Rain Bird U-8H is designed for compatible Rain Bird spray bodies and shrub adapters, including models from the Rain Bird 1800 Series. For installations with higher supply pressure, pressure-regulated spray bodies help maintain consistent nozzle performance.

When designing your irrigation system, position the nozzles to provide adequate overlap between adjacent spray patterns. The U-8H can be combined with matching quarter-circle and full-circle U8 nozzles to cover corners, borders and interior lawn sections. Always account for the different flow rates when calculating the total water demand of each irrigation zone.

Technical specifications and dimensions

• Manufacturer: Rain Bird
• Model: U-8H / U8H
• Series: Rain Bird U-Series
• Product type: High-efficiency dual-orifice spray nozzle
• Spray pattern: Fixed 180° half-circle
• Spray radius: 1.7 to 2.4 m
• Operating pressure: 1.0 to 2.1 bar
• Optimum operating pressure: 2.1 bar
• Flow rate: 1.4 to 2.0 l/min
• Hourly water consumption: 84 to 120 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: Lawn edges, straight borders and narrow landscaped areas
• Package contents: 1 Rain Bird U-8H dual-orifice spray nozzle

Frequently asked questions about the Rain Bird U-8H

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

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

Is the 180° spray angle adjustable?

No. The U-8H has a fixed half-circle spray pattern. Quarter-circle and full-circle versions are available separately within the U8 Series.

How much water does the U-8H use?

The flow rate ranges from approximately 1.4 to 2.0 l/min, equivalent to 84 to 120 litres per hour, depending on pressure.

Why does the nozzle have two spray openings?

The additional opening directs water close to the sprinkler head, helping prevent dry patches and improve uniform coverage across the watering area.

Where should a half-circle nozzle be installed?

The U-8H is particularly suitable for straight lawn edges, where the sprinkler needs to water a semicircular area without spraying behind its installation position.

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

Yes. The U-8H can be combined with appropriately selected U-8Q quarter-circle and U-8F full-circle nozzles. The flow rates and available water supply must be considered when planning each irrigation zone.