The Worcester Bosch 87161069390 Upper Flue Tube is a genuine replacement flue component designed to form the top section of your boiler’s flue assembly. This upper flue tube works in tandem with the lower flue and other flue components to safely convey combustion gases from the boiler’s heat exchanger to the outside atmosphere. Correct flue routing is essential for efficient draft performance, safe removal of exhaust gases and compliance with ventilation and building standards. A damaged or poorly sealed upper flue tube can lead to combustion problems, condensation issues or boiler lockouts.

This upper flue tube is compatible with Worcester Bosch Ri and Greenstar series boilers that specify part number 87161069390 in their flue system configuration. To ensure a proper fit and safe operation, always check the part number on your existing flue component or consult your boiler’s service documentation before installation, as flue system designs and dimensions vary between models.

Supplied ready for installation, the 87161069390 Upper Flue Tube connects smoothly with the existing flue sections and sealing interfaces without modification when fitted by a qualified engineer. Choosing this genuine Worcester Bosch flue tube helps maintain safe combustion gas evacuation, reliable boiler performance and long-term system integrity in compatible Ri and Greenstar boilers.