Patent ID: 6997393

Claim:
A pop-up irrigation sprinkler comprising: (a) a generally upright housing having a lower end and an upper end, a threaded inlet port formed within the lower end of said housing for coupling with a pressurized water source; (b) a pop-up riser in said housing for movement between an extended position and a retracted position, having a threaded upper end for coupling a spray nozzle, a lower end, and a side wall connecting said upper end and said lower end; (c) seal valve disposed adjacent to a lower end of said riser having a valve body having a lower end and an upper end, a valve plug having a lower surface and an upper surface at the lower end of the valve body for sealing said inlet port while said riser is in the retracted position, at least one channel within the valve plug, and an upper port in the upper end of said valve body in fluid communication with said at least one channel; and (d) a pressure reducing valve within said riser having a flow tube mounted for limited movement within said riser and having an upper port and a lower port disposed adjacent the upper end of said valve body; said lower port of said flow tube capable of being closed by moving against the upper surface of said valve plug by backpressure of water when said riser is in the extended, operative position.