Installed in parks and gardens across the world, the 1800 Series is the number 1 brand of commercial irrigation spray head in the world.Chosen for its reliability, rugged materials and versatility, the 1800 Series has premium quality built in for reliable operation and long life.Their superior components and features make them the spray heads of choice for a wide variety of applications.Windshield wiper seal.The proprietary co-molded wiper seal features a plastic-wrapped "cage" to provide unmatched resistance to gravel, pressure and the environment.Additionally, the pressure-activated multi-function seal provides a positive seal without excess flow that allows more heads to be installed on the same valve.Precision Precise click-controlled flush flush removes debris from the unit, ensuring positive stem retraction in all soil types.Solid spring.* Heavy duty stainless steel spring for reliable rod retraction.Construction * Made of UV-resistant plastic and corrosion-resistant stainless steel parts, ensuring a long product life.1800 Orange Pop-Top pre-installed Flush cap prevents debris from entering after flushing.Allows for easy nozzle installation.