Worcester Bosch Rubber O-Ring 87161138330

This is a rubber O-ring manufactured by Worcester Bosch, supplied under part number 87161138330. It belongs to the Ri, CDi and Greenstar appliance families and forms a compression seal where components meet the pipework of the central heating system. Worcester Bosch uses O-rings, washers and gaskets of this type at heat exchangers, condensate traps and numerous other joints to stop water or gas escaping from the appliance.

• Weeping or visible water traces around a joint on the heat exchanger, pipework or condensate trap
• Water staining, crusting or corrosion on the metalwork next to a sealed connection
• A rubber seal that has hardened, flattened, cracked or swollen with age
• Repeated pressure loss on the heating circuit with no other obvious cause
• A smell of gas at a sealed joint on the appliance

• Check the GC number and appliance serial plate to confirm the O-ring suits your model before ordering.
• Cross-check the alternative part numbers 1021940 and WB87161138330 against any number shown on the old component or in the appliance literature.
• Assess the joint being repaired and order any additional gaskets, washers or seals needed to complete the work in one visit.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.