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The flue connection plug is a small but vital component for sealing unused flue outlets or connecting flue extensions. It ensures that combustion gases are properly vented and prevents leaks that could compromise safety. This plug is typically used during boiler installation or when modifying flue configurations. Made from durable materials that resist high temperatures and corrosion, it provides a tight seal. Whether you are a heating engineer or a DIY enthusiast, this flue connection plug is a handy spare part to have on hand for boiler maintenance and repair. Always check the diameter and type of your flue system to ensure compatibility. A secure flue connection is essential for efficient and safe boiler operation.