Worcester Bosch Washer 87110041730

This is a Worcester Bosch washer, supplied under part number 87110041730. It is a sealing component used at a joint or connection point inside the appliance, where it compresses between mating faces to stop water escaping. It belongs to the Worcester Bosch Greenstar range and is listed for the Greenstar RSF natural gas model.

• Water weeping or dripping from a joint where the washer sits
• A visible trail of water staining, scale or corrosion around the connection
• The washer has hardened, flattened or cracked with age and no longer seals under compression
• Repeated loss of system pressure that traces back to a joint rather than the boiler body
• A joint that continues to seep after being nipped up, indicating the seal itself has failed

• Confirm the model and, where available, the GC number on the appliance data badge against the compatibility list below.
• Check the part number on the existing component or in the appliance literature, as several washers are used across the Greenstar range and they are not interchangeable.
• If the joint is being disturbed, check whether any other seals or gaskets at the same connection also need renewing.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.