O-ring 15.60 x 1.78 De Dietrich 7700971

An O-ring with dimensions 15.60 x 1.78 mm is a circular sealing element used in various connections within heating systems, such as between pipes, fittings, or components. This size is common in many boiler and burner applications to prevent fluid or gas leaks. When replacing an O-ring, it is important to use the correct size and material compatible with the operating temperature and medium. A properly seated O-ring ensures a reliable seal and helps maintain system integrity.