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

Rain Bird MPR-12H spray nozzle for wide lawn borders

The Rain Bird MPR-12H is a fixed-pattern spray nozzle with a 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 where a longer spray radius is required. Whether installed next to a patio, garden path or property wall, the nozzle distributes water over the lawn on one side of the sprinkler.

As part of the Rain Bird MPR Series, the MPR-12H features matched precipitation rates that help coordinate water distribution across different nozzle patterns. It is a practical choice when the MPR-10H does not provide sufficient coverage but a fixed half-circle spray pattern is still required. This makes it suitable for both new irrigation systems and upgrades to existing installations.

180° half-circle coverage with up to 3.7 m radius

The fixed 180° spray pattern makes the Rain Bird MPR-12H particularly useful for sprinkler positions along straight lawn edges. Water is distributed over a half-circle area, helping keep irrigation focused on the grass rather than surrounding paved surfaces. Correct installation and orientation are important for achieving the intended coverage.

The spray radius ranges from 2.7 to 3.7 m depending on operating pressure. At the optimum pressure of 2.1 bar, the nozzle reaches approximately 3.7 m. Its 30° spray trajectory is higher than that of the MPR-10H. The integrated stainless steel adjustment screw allows the radius to be reduced when necessary.

Matched precipitation rates for balanced lawn irrigation

MPR stands for Matched Precipitation Rate. Rain Bird MPR nozzles are designed with coordinated precipitation rates to simplify the combination of different spray patterns. With correct sprinkler placement, suitable quarter-circle, half-circle and full-circle nozzles can be combined to provide balanced irrigation across differently shaped lawn areas.

At an operating pressure of 2.1 bar, the Rain Bird MPR-12H uses approximately 4.9 litres of water per minute, equivalent to about 294 litres per hour. When planning an irrigation zone, consider the combined flow requirements of all connected nozzles. Sufficient water pressure, suitable sprinkler spacing and adequate spray overlap are also essential for consistent coverage.

Easy installation on Rain Bird spray bodies

The Rain Bird MPR-12H fits compatible Rain Bird spray bodies and suitable shrub adapters, including models from the Rain Bird 1800 Series. A white fine-mesh filter screen is supplied to help protect the nozzle from debris. The stainless steel adjustment screw allows convenient radius adjustment during installation.

For a complete lawn irrigation system, the MPR-12H can be combined with suitable MPR-12Q quarter-circle and MPR-12F full-circle nozzles. These models have comparable spray radii at the same operating pressure but different spray patterns and flow rates. Pressure-regulated spray bodies can help maintain suitable nozzle pressure when the supply pressure is higher than required.

Technical specifications and dimensions

• Manufacturer: Rain Bird
• Model: 12H / MPR-12H
• Series: Rain Bird MPR, 12 Series
• Product type: Fixed-pattern spray nozzle
• Spray pattern: Fixed 180° half-circle
• Spray radius: 2.7 to 3.7 m
• Pressure range: 1.0 to 2.1 bar
• Optimum operating pressure: 2.1 bar
• Flow rate at 2.1 bar: Approx. 4.9 l/min
• Hourly water consumption at 2.1 bar: Approx. 294 l/h, calculated
• Spray trajectory: 30°
• Radius adjustment: Stainless steel adjustment screw
• Spray angle: Fixed, not adjustable
• Filter screen: White fine-mesh filter
• 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, wider lawn strips and landscaped areas next to paths or patios

Frequently asked questions about the Rain Bird MPR-12H

What is the spray radius of the Rain Bird MPR-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 MPR-12H has a fixed half-circle spray pattern. However, the radius can be reduced using the stainless steel adjustment screw.

How much water does the MPR-12H use?

At an operating pressure of 2.1 bar, the flow rate is approximately 4.9 l/min. This corresponds to around 294 litres per hour.

Which sprinkler bodies are compatible?

The Rain Bird MPR-12H fits compatible Rain Bird spray bodies and shrub adapters, including models from the Rain Bird 1800 Series.

What does MPR mean?

MPR stands for Matched Precipitation Rate. These nozzles are designed with coordinated precipitation rates to support balanced water distribution across different spray patterns.

What is the difference between the MPR-12H and MPR-10H?

The MPR-12H reaches up to 3.7 m and has a 30° spray trajectory. The MPR-10H reaches up to 3.1 m and has a 15° spray trajectory.