Protek's Automatic Nozzles by design adjust to fluctuating water flow to maintain effective pressure and a consistent stream in all flow ranges. Nozzles are adjustable from straight stream to fog pattern. Nozzles flush easily without shutting down and provide a constant flow in either fog or straight stream. Inlet size is available in 1" (25mm), 1-1/2" (38mm) or 2-1/2" (65mm). All nozzles are compatible with Protek's foam aeration tubes. Nozzles are available in ball/slide valve configurations and shutoff/playpipe combinations. All Protek nozzles are NFPA compliant.