Worcester Bosch Flue Sampling Tube Kit Greenstar Ri 87161143890

The Worcester Bosch flue sampling tube kit is a service component for the Greenstar and Ri appliance families. It provides the tube used to draw flue gas samples at the appliance's flue sampling point during commissioning, servicing and combustion analysis. Worcester Bosch supplies it as a flue assembly spare under part number 87161143890.

• Flue gas readings are unstable or inconsistent when the analyser probe is inserted at the sampling point.
• The sampling tube is kinked, split, crushed or has been distorted during previous service work.
• The tube end is blocked with debris, condensate residue or corrosion, restricting the gas path to the analyser.
• The tube will not seat correctly in the flue sampling point, so a reliable seal cannot be achieved.
• The existing tube is missing from the flue assembly and cannot be located for combustion checks.

• Check the appliance GC number and serial plate against the compatibility list to confirm the correct flue assembly for the model.
• Note the alternative part number 1021981 when cross-referencing older documentation or stock records.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.