Rain Bird 15H - 15 ft. Half-Circle Pattern Nozzle (180 Degree)

Rain Bird 15H MPR Nozzle – Specifications

What does "MPR" mean, and why does it matter?
MPR stands for Matched Precipitation Rate. It means that nozzles with different arc sizes (half-circle, quarter-circle, full-circle) and different radii in the same series are engineered to apply water at the same precipitation rate — measured in inches per hour. This is critical for mixed-pattern zones: without MPR technology, a full-circle nozzle on the same circuit as a half-circle nozzle would apply much less water to the half-circle area, resulting in dry patches. MPR eliminates that problem.

What spray bodies is the 15H compatible with?
The 15H fits all Rain Bird spray bodies and shrub adapters, including the entire 1800 Series pop-up spray head line. DripWorks carries a full selection of compatible spray bodies. Rain Bird recommends using 1800 PRS (pressure-regulated) spray heads in higher-pressure situations to maintain optimum nozzle performance.

Can I mix the 15H with other MPR nozzles on the same zone?
Yes — and that's one of the biggest advantages of the MPR system. The 15H is fully compatible with other nozzles in the 5, 8, 10, 12, and 15 Series. You can run 15H half-circle heads alongside 15Q quarter-circle and 15F full-circle heads on the same irrigation circuit and achieve uniform water distribution throughout the entire zone.

What is the optimum operating pressure for the 15H?
The nozzle is designed to operate between 15 and 30 PSI, with 30 PSI as the recommended optimum pressure for best performance. At lower pressures, radius and uniformity may be reduced. If your system pressure exceeds 30 PSI, Rain Bird recommends pairing this nozzle with a pressure-regulated spray body to maintain consistent output. DripWorks also carries inline pressure regulators if needed.

What is the Top Color-Coded™ feature?
Rain Bird's Top Color-Coding system color-codes each nozzle on its top cap according to its radius and arc pattern. This allows installers and homeowners to quickly verify which nozzle is installed in each head — even when the irrigation system is not running. It speeds up installation, simplifies troubleshooting, and ensures the right nozzle ends up in the right location on every job.

What does the included filter screen do?
Each 15H ships with a 1800 Series white filter screen (.035" × .035" mesh). This screen sits at the base of the nozzle and captures debris from the water supply before it can reach the nozzle orifice. It maintains precise radius adjustment over time and prevents clogging — a common cause of uneven spray patterns and dry spots in the lawn.

When would I choose a 15H over a 12H or 10H?
Choose the 15H when you need to cover a strip or edge up to 15 feet wide from the head location. For narrower beds or tighter spaces, the 12H (12 ft.) or 10H (10 ft.) would be more appropriate to avoid overspray onto sidewalks, driveways, or structures. DripWorks carries multiple radius options in the Rain Bird MPR series — browse the full nozzle selection to find the right fit for your layout.

Is this nozzle compatible with smart irrigation controllers?
Yes. The 15H works with any standard irrigation system controlled by solenoid valves, which are compatible with all smart controllers from Rain Bird, Rachio, Orbit B-Hyve, Hunter, and others. DripWorks carries a full range of irrigation timers and controllers to complete your system.