Worcester Bosch Return Pipe 87161065450

The 87161065450 is a return pipe supplied by Worcester Bosch for its Greenstar i System boiler range. It forms part of the internal pipework that carries water back from the heating circuit into the appliance, where it is reheated and circulated again. The pipe is listed under Worcester Bosch's pipes and hoses spare part group and is used across a number of Greenstar 12i, 15i and 18i System variants in both natural gas and LPG formats.

• Water weeping or staining around the pipe run or at its joints inside the casing
• Visible corrosion, pitting or scale build-up on the pipe surface
• A persistent pressure drop on the boiler gauge that cannot be traced to the external system
• Kettling or gurgling noises suggesting air is being drawn in through a damaged section
• Physical deformation or cracking following work inside the appliance

• Check the GC number on the appliance data badge against the compatibility list to confirm the pipe matches your model.
• Cross-check any alternative number already recorded for the part, such as 1014963 or N7963, before ordering.
• Inspect the surrounding joints and seals while the appliance is open, as these are often disturbed during replacement.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.