Split-system millivolt control natural gas valve for use in vented appliances. HI/LO burner adjustment with manually operated knob Minimum voltage 145mV Coil resistance 2.25±0.5 Thermo-Electric Unit Hold-in current less than 285Ma Drop-out current Greater than 125mA with coil resistance 0.018± 0.003 Gas type Natural Gas HI/LO action Manual Pressure set-point 3.5” w.c. ± 0.3 Range of adjustment 3.5” w.c. -1.6” w.c. Set at 30K btu/hr Thermocouple connection 11/32 ASA-DNC Natural Gas Inlet 3/8 in. NPT Natural Gas Outlet 3/8 in. NPT Maximum natural gas inlet pressure 1/2 PSIG Ambient operating temperature 32° to 175° F Maximum @ 1 in. w.c. pressure drop 100,000 BTU per hour Regulation capacity 5,000 to 195,000 BTU AP per hour Replacement valve for: Desa FMI 14389 Monessen 37D0117 Majestic 057955 Empire R7577 Monessen S11345 Sit Controls 0820652 Wood Heat Stoves 721-300-HS IHP Lennox J6830...Gas Valves that have been installed or used in any way cannot be returned for refunds.