1 Inch Diaphragm Type Shut Off Gas Valve for Use with Scentr y III Control Systems 1 inch diaphragm type gas valve. Use with any Safety First USA Scentry III gas detector systems , i.e. the SFGVC or GFRAB No control systems included . UL listed gas valve interfaces with Scentry III-GFRAB home gas detector not included for natural gas and propane or the Scentry III-SFGVC automatic gas valve controller not included . Protect home or building from a gas explosion or fire from gas leaks. Note This is only the gas valve. Electrically operated gas shut off valve opens and closes on demand signal from a thermostat or other controlling device. For use with natural gas and LP gas at pressures up to 0.5 psi. This White Rodgers replacement is a compression spring closing and soft seat construction gas valve. Safety First Scentry III GVM Gas Valve Specifications Dimensions 4.06 inches high by 2.63 inches wide by 3.5 inches long Voltage 24 VAC, 60 Hz Inlet/Outlet Size 1.0 inches x 1.0 inches. BTU Capacity 505,000 Amp Rating 0.4A, 7.5W Electrical Connections 30 inches Replaces White Rodgers Part # 2509-258 GFRAB and the GFA require use of this valve or the equivalent 1/2 or 3/4 inch GVD valves. Maximum inlet pressure 0.5 psi Permissible ambient surface temperature is 40 to 175 degrees F, CSA, 40 to 140 degrees F, UL Two 30 inch leads Warranty One year by Safety First USA Agency Listing CSA AGA/CGA Certificate number 2295211656058 Australian Gas Association Certificate number 4235 UL Recognized File Number MH5939