Joint de clapet d'air de retour (5 ps) De Dietrich S103330

The non-return air flap gasket seals the joint between the non-return flap and the duct or housing, preventing air leakage and ensuring proper one-way airflow. This gasket is made from durable, flexible material that withstands temperature variations and pressure changes in the air system. It is commonly used in burner air intake or exhaust systems where backflow prevention is critical. Replacing a worn gasket restores the efficiency of the non-return flap, reducing energy loss and maintaining correct combustion air supply. This simple component plays a key role in the reliable operation of heating equipment.