Toro 570Z PRX Series The Toro 570Z PRX series features a built-in pressure regulator (30 psi) which compensates for high or fluctuating water pressure to ensure maximum performance and optimum water distribution. Equipped with Toro's X-Flow shutoff device, the 570 PRX automatically prevents water loss resulting from missing or damaged nozzles, and allows you to change nozzles or perform nozzle maintenance while the system is running. Prevents water geysers if the head is mowed off or vandalized