Hunter PROS06PRS30CVR 6" Pro-Spray 30 PSI Check Valve with Reclaimed Body Cap The ability to regulate water pressure is crucial to overall system efficiency. The brown-capped PRS30 takes all the rugged and reliable features of the Pro-Spray body and delivers efficient pressure regulation by keeping water pressure at a constant 30PSI. The built-in regulator is proven to reduce water waste and promote healthier root zones, because water is delivered at the optimum pressure for spray nozzles. The PRS30 optimizes performance from the Pro Adjustable and Pro Fixed Nozzles, and is available in shrub, 3", 4”, 6” and 12”, pop-up heights. It is recommended for both residential and commercial applications.