Guarnizione del manicotto - sportello del bruciatore De Dietrich 300003349

The sleeve gasket for burner door provides a secure seal between the burner door and the boiler body. This gasket prevents flue gas leakage and maintains proper combustion pressure. It is a common replacement part during burner maintenance or door servicing. Using a quality gasket ensures efficient operation and reduces the risk of heat loss or safety hazards.