Rain Bird U-12H dual-orifice spray nozzle - 180° half-circle - 2.7 to 3.7 m radius

Rain Bird U-12H dual-orifice nozzle for straight lawn edges

The Rain Bird U-12H is a high-efficiency dual-orifice spray nozzle with a fixed 180° half-circle spray pattern and a radius of 2.7 to 3.7 m. It is particularly suitable for automatic irrigation along straight lawn boundaries, garden paths and patios. Its semicircular spray pattern directs water to one side of the sprinkler, helping keep irrigation focused on the intended lawn area.

As part of the Rain Bird U-Series, the U-12H features two separate spray openings. This design helps distribute water both close to the sprinkler head and across the outer watering area, providing more uniform coverage throughout the half-circle pattern.

180° half-circle coverage with a 3.7 m radius

The fixed 180° spray pattern makes the Rain Bird U-12H an excellent choice for sprinklers installed along straight lawn edges. It is especially useful where grass borders patios, walls, pathways or landscaped beds. The half-circle pattern helps direct water onto the lawn rather than behind the sprinkler.

The spray radius ranges from 2.7 to 3.7 m depending on operating pressure. At the recommended pressure of 2.1 bar, the nozzle reaches approximately 3.7 m. Its 23° spray trajectory supports water distribution over the longer radius. An integrated stainless steel adjustment screw allows the radius to be reduced when required.

Dual-orifice technology for improved close-in watering

The distinguishing feature of the Rain Bird U-12H is its dual-orifice design. The main opening distributes water toward the outer edge of the spray pattern, while the additional opening delivers water close to the sprinkler head. This helps address uneven watering near the spray body, where conventional nozzles may leave dry patches.

Improved close-in coverage supports more consistent irrigation along lawn borders. Combined with suitable sprinkler spacing and the correct operating pressure, the U-12H can help make lawn watering more efficient. A properly designed irrigation system also reduces the need to compensate for dry spots by extending watering times unnecessarily.

Easy installation on Rain Bird spray bodies

The Rain Bird U-12H is compatible with Rain Bird spray bodies and suitable shrub adapters, including models from the Rain Bird 1800 Series. A fine mesh filter screen helps protect the lower spray opening from debris. For installations with higher water pressure, pressure-regulated spray bodies help maintain consistent nozzle performance.

When planning your irrigation system, the U-12H can be combined with suitable U-12Q quarter-circle and U-12F full-circle nozzles. Consider the different flow rates and ensure sufficient overlap between adjacent spray patterns to achieve uniform lawn coverage.

Technical specifications and dimensions

• Manufacturer: Rain Bird
• Model: U-12H / U12H
• Manufacturer SKU listed in the US store: U10110
• Series: Rain Bird U-Series
• Product type: High-efficiency dual-orifice spray nozzle
• Spray pattern: Fixed 180° half-circle
• Spray radius: 2.7 to 3.7 m
• Operating pressure range in performance chart: 1.0 to 2.1 bar
• Optimum operating pressure: 2.1 bar
• Flow rate: 3.4 to 4.9 l/min
• Hourly water consumption: Approx. 204 to 294 l/h
• Spray trajectory: 23°
• Spray openings: 2, for close-in and outer coverage
• Radius adjustment: Stainless steel adjustment screw
• Spray angle: Fixed, not adjustable
• Filter screen: Fine mesh
• Compatibility: Rain Bird spray bodies and suitable shrub adapters
• Recommended spray bodies: Rain Bird 1800 Series, pressure-regulated PRS models for higher supply pressure
• Applications: Straight lawn edges, garden boundaries and landscaped borders

Frequently asked questions about the Rain Bird U-12H

What is the spray radius of the Rain Bird U-12H?

The spray radius ranges from 2.7 to 3.7 m depending on operating pressure. At 2.1 bar, the nozzle reaches approximately 3.7 m.

Can the 180° spray angle be adjusted?

No. The U-12H has a fixed half-circle spray pattern. However, the radius can be reduced using the integrated stainless steel adjustment screw.

How much water does the U-12H use?

The flow rate ranges from 3.4 to 4.9 l/min, equivalent to approximately 204 to 294 litres per hour, depending on pressure.

Why does the nozzle have two spray openings?

The additional opening distributes water close to the sprinkler head, helping improve watering uniformity and reduce dry patches around the spray body.

Which sprinkler bodies are compatible?

The Rain Bird U-12H is compatible with Rain Bird spray bodies and suitable shrub adapters, including models from the Rain Bird 1800 Series.

Can the U-12H be combined with other U12 nozzles?

Yes. The U-12H can be combined with suitable U-12Q quarter-circle and U-12F full-circle nozzles. Their different flow rates should be considered when designing the irrigation zone.