Smart Valve, Gas Flow Control and Electronic Intermittent Pilot Sequencing , 24Vac, 90 Second Ignition Trial Time, Continuous Retry, 1/2 Psi Pressure Rating, 1/8" Pressure Tapping, Natural Gas, Standard Opening, 3/4"x3/4" NPT, 3.5" wc , -40-175 Degree Ambient Temperature Range, No PrePurge, Includes two 3/4"x1/2" Reducer Bushings and LP Conversion Kit