Smart Valve, Direct Hot Surface Ignition, 24Vac, 4 Trial To Lockout, 1/2 Psi Pressure Rating, 1/8" NPT Pressure Tapping, Slow Opening, 1/2"x1/2" NPT, 3.5"wc Regulator Setting, -40-175 Degree Ambient Temperature Range, 9 Second Ignition Trial Time, Includes LP Conversion Kit