Single Stage Pressure Regulating Valve, 24Vac, 1 1/4", Natural Gas, 3"-4.5" Water Column High Fire Regulator Setpoints, 3.5" Water Column Factory Setting, 480-1600 Cfh Capacity, 6 Second Maximum Valve Opening Time, 2 Second Max Valve Closing Time, 1/8" NPT Pilot Tapping, 1/2 Psi Pressure Rating, Upright Horizontal Mounting, Slow Opening, 5/16" UNF Bleed Tapping, Aluminum Body, Two 30" Leadwires