Worcester Bosch Rubber Washer 87161120450

The Worcester Bosch 87161120450 is a rubber washer used on the water-carrying connections of Worcester Bosch Junior RSF boilers. It sits between two mating faces and compresses to form a flexible seal, stopping water weeping from the joint while the appliance is running and pressurised. Washers of this type are used at unions, spigots and threaded connections where a resilient seal is needed rather than a fibre or copper gasket, because the rubber takes up small imperfections in the mating surfaces. It is a serviceable item, normally renewed whenever the joint is disturbed or the existing seal has hardened.

• Water weeping or dripping from a joint once the boiler is up to temperature
• Damp staining, corrosion or limescale tracking around a connection inside the casing
• A washer that has hardened, flattened, cracked or lost its shape when inspected
• Scale or debris trapped on the sealing face, causing a drip that will not clear
• The same joint leaking again shortly after a previous repair

• Confirm the boiler model and serial number against the compatibility list before ordering.
• Check the existing washer against alternative number 1021698 where the part has been replaced previously.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.