Worcester Bosch Diverter Valve Seal CDi Greenstar 87161068460

The Worcester Bosch diverter valve seal, part number 87161068460, is a replacement sealing component for the diverter valve assembly fitted to CDi and Greenstar appliances. The diverter valve switches water flow between domestic hot water and central heating, and this seal sits within the valve body to keep that flow contained as the internal components move. It is a service item rather than a complete valve, so it is normally replaced when the existing seal has hardened, flattened or started to weep.

• Water weeping or dripping from the diverter valve body or the area around it
• System pressure dropping and needing regular topping up, with no other obvious source of loss
• The seal visibly hardened, flattened, swollen or deformed once the valve is opened
• Scale, corrosion or debris deposits sitting around the seal seating
• Diverter valve failing to hold position, with hot water or heating output affected as a result

• Check the GC number on the appliance data badge against the compatibility list before ordering, as the same seal is used across a wide spread of CDi and Greenstar models.
• Cross-reference the alternative numbers 1021030 and WB87161068460 where the original component is marked differently.
• Confirm whether the surrounding seals and washers in the valve are also due for replacement, so the repair is completed in one visit.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.