Rain Bird a37421 Pop-up Spray Head Sprinkler Prs

Product Description

The RAIN BIRD a37421 is a pop-up spray head sprinkler engineered for landscape and commercial irrigation systems. It features an integrated PRS pressure-regulating stem that reduces flow by approximately one gallon per minute per spray head, cutting misting and fogging caused by excessive water pressure. The co-molded Triple-Blade Wiper Seal prevents debris from entering the body during pop-up and pop-down cycles, balancing flushing, flow-by, and debris protection without sacrificing performance. Licensed irrigators and landscape contractors install this unit in residential and light commercial turf and planting bed zones.

The a37421 is suited for residential lawn irrigation, commercial landscape systems, and recycled water applications. The corrosion-resistant construction handles treated recycled water containing chlorine and other chemicals, making it a practical choice where reclaimed water is mandated by local ordinance. The pre-installed 1800 Pop-Top flush plug blocks debris from entering the body after flushing, streamlining nozzle installation during new construction or retrofit work. Debris pockets in the base collect particulate and prevent recirculation inside the body during operation, extending service life in silty or sandy soil conditions.

Key Features

• Integrated PRS pressure-regulating stem reduces flow by approximately one gallon per minute per head, limiting misting and fogging
• Co-molded Triple-Blade Wiper Seal balances flushing, flow-by, and debris protection during pop-up and pop-down cycles
• Flow-Shield technology assists with identifying and diagnosing system performance issues in the field
• Reinforced ratchet mechanism allows tool-free nozzle pattern alignment and resists chemical degradation in recycled water
• Stainless steel retraction spring provides reliable stem return and corrosion resistance
• All components removable from the top without special tools for fast in-field flushing and maintenance

Compatibility

Designed as an OEM-style replacement for Rain Bird RD1800 series pop-up spray body systems in residential and commercial landscape irrigation applications.

Installation Notes

Installation should be performed by a licensed irrigator or qualified landscape contractor in accordance with local plumbing and irrigation codes. Shut off the irrigation zone valve and relieve system pressure before disassembling or replacing any spray head. Use the pre-installed flush plug and top-serviceable design to flush debris before installing the nozzle. Do not overtighten threaded fittings, as doing so can crack the spray body housing.