The Lochinvar & A.O. Smith 100265711 Natural Gas Burner Extension Assembly is a critical combustion component designed for use in compatible commercial and residential gas-fired boilers and water heating systems. It extends and directs the natural gas burner flame path, helping ensure efficient fuel combustion and consistent heat transfer within the equipment. By supporting proper bur... https://www.partshnc.com/100265711-lochinvar-ao-smith-nat-gas-burner-extension-assy