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Flue plugs are essential for sealing unused flue outlets or test points on your boiler or heating system. They prevent exhaust gases from leaking and maintain proper draft, ensuring safe and efficient combustion. As part of burner spare parts and boiler maintenance and repair parts, these plugs are easy to install and provide a reliable seal. Whether you are servicing gas burner parts or replacing worn components, flue plugs help keep your system safe and compliant.