Hydrotherm 62-3668 Natural Gas Pilot Assembly (Honeywell Q3451B1103) Replaces Hydrotherm 2262-3668 Used On HC-65D, HC-85D, HC-100D, HC-120D, HC-145D, HC-165D, R-180C, R-210C, R-250C, R-300B, VS-85B, VS-110B, VS-135B, VS-165B, VGA-VGA-175B, VGA-200B, VGA-250B, VGA-300B, VGA-350B, VGA-400B, EW-45, EW-65, EW-100, EW-125, EW-145, EW-165