2" 1800 Series Spray Body Chosen for its reliability, heavy-duty materials, and versatility, the 1800 Series offers a broad selection of pop up heights and nozzle combinations for watering shrubs, small lawns, and irregularly shaped planting areas. All models feature Rain Bird's patented pop-up mechanism with heavy-duty stainless steel spring for dependable out-of-sight retraction, plus an exclusive co-molded wiper seal for unmatched resistance to grit, pressure, and extreme environments. The Perfect Pair for Pressure Regulation Rain Bird pressure-regulating stem (PRS) saves up to a gallon of water per minute. We offer three perfectly paired combinations of PRS spray bodies and high-efficiency nozzles. Each pair is designed to work together to give you the best possible performance across your entire irrigation system all while saving water. Features All 1800: Co-molded wiper seal provides unmatched resistance to grit, pressure and the environment Constructed of time-proven UV-resistant plastic and corrosion-resistant stainless steel parts, ensuring long product life Precision controlled flush at pop-down clears debris from unit, assuring positive stem retraction in all soil types Two-piece ratchet mechanism allows easy nozzle pattern alignment and provides added durability Five-Year Trade Warranty 1800 SAM Series: Built-in Seal-A-Matic (SAM) check valve. Eliminates the need for under-the-head check valves Ideal for use in areas with changing elevations Traps water in lateral pipes in elevation changes of up to 14 feet (4.2 m), eliminating low head drainage at the base of slopes or hillsides Reduces wear on system components by minimizing water hammer during start-up 1800 PRS Series: All Rain Bird pressure regulating spray bodies are WaterSense certified by ICC-ES PATENTED PRS pressure regulator built into stem. No parts to be installed at the site. Saves time and money Maintains constant outlet pressure at 30psi (2.1 bar) or 45 psi (3.1 bar) at varying inlet pressures regardless of nozzles used 30 psi is recommended for optimal spray nozzle performance, 45 psi is recommended for optimal rotary nozzle performance 1800 SAM-PRS-30 and SAM-PRS-45 Series Combines Seal-A-Matic check valve and PRS-30 or PRS-45 for best performance Ideal for sloped applications that have fluctuating or high pressure  Specification Sheet