The engine block water drain plug is a specific component for Citroën models 11CV, 15CV, HY, ID, and DS. This drain plug enables efficient and rapid discharge of coolant during engine maintenance or repair. Proper functioning of the drain plug is crucial to prevent overheating and other engine damage. Made from durable materials to withstand the extreme temperature variations and pressure in the cooling system, this part is essential for the reliable and effective operation of your vehicle.