The professional series spray head is the premium offering in Orbit’s lineup. It is available in 2- and 4-in. riser stem heights and is ideal for a broad range of landscape types. The wiper seal features an over-molded structural support that ensures long-term, smooth retraction and prevents water from blowing by the riser stem. The riser spring which creates the pop-up action is made of corrosion-resistant stainless steel for years of reliable operation. A ratchet mechanism in the riser stem allows you to adjust the direction of the spray after installation. The bottom of the can has an integral silt trap. The spray body inlet has standard 1/2-in. female pipe threads (FPT) which connect to Blu-Lock and Riser-Flex fittings, as well as 1/2-in. Schedule 80 PVC and cut-off risers. The fixed pattern nozzle is available in 15-ft. radius and quarter, half, full, center strip, side strip, and end strip patterns. It includes a filter and adjustment screw which allows you to reduce the spray pattern down to 75 percent of its rated distance. Its low-angle trajectory helps improve efficiency by minimizing wind drift. These spray heads do not have pressure-regulating riser stems and are not for sale in California and other states which require pressure regulation. For outdoor irrigation use with cold water only.