Honeywell SmartValve, 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