Worcester Bosch Washer Pack of 10 87377048990

This is a Worcester Bosch washer, supplied under part number 87377048990 and listed as a pack of 10. It belongs to the manufacturer's gaskets, seals and washers range, the consumable components used to seal joints and connections inside the appliance. Washers of this type sit at union and connection points on Worcester Bosch boilers, where they compress to form a watertight seal and prevent weeping at the joint.

• Water weeping or a visible drip at a joint or union where the washer sits
• A joint that will not seal after being remade, even when tightened correctly
• The washer is flattened, hardened, cracked or deformed when removed
• Scale or corrosion build-up on the washer face or the sealing surface around it
• Damp staining or mineral deposits on nearby components, indicating a slow long-term leak

• Check the appliance GC number and model against the compatibility list below before ordering, as this washer is used across several Greenstar ranges.
• Confirm the part number on the existing component or in the appliance documentation matches 87377048990.
• If several joints are being remade at the same time, check whether a full gasket and seal kit is the more practical option.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.