The Burnham Boiler 8206002 Inner Observation Port Gasket is a sealing component designed for use in compatible Burnham boiler systems. It fits around the inner observation port to create a secure seal, helping prevent combustion gases from escaping through the opening. This gasket supports safe and reliable boiler operation while maintaining proper combustion chamber integrity. Its du... https://www.partshnc.com/8206002-burnham-boiler-inner-observation-port-gasket