The Lochinvar & A.O. Smith 100368388 Natural Gas Pilot Assembly Kit with Tube is an OEM replacement component designed for compatible natural gas water heaters. It works by delivering gas to the pilot burner, creating a controlled flame that ignites the main burner when heat is required. This assembly is used with compatible Lochinvar and A.O. Smith residential and commercial water he... https://www.partshnc.com/lochinvar-a-o-smith-100368388-pilot-kit-with-tube-assembly-nat