The Fulton Boiler 2-12-000552 Gas Flapper Gasket is a replacement sealing gasket designed for use in Fulton gas-fired boiler assemblies. It forms a secure seal around the gas flapper mechanism, preventing air or gas leakage and ensuring proper combustion control. Used in commercial and industrial boiler systems, this gasket supports efficient burner operation and maintains system safe... https://www.partshnc.com/2-12-000552-fulton-boiler-gas-flapper-gasket