Worcester Bosch Flue Gasket 40/140 87161085780

The Worcester Bosch 87161085780 is a 40/140 flue gasket, a sealing component that sits at the flue connection on the appliance. It forms a gas-tight joint between the flue path and the surrounding casing, preventing products of combustion from escaping into the room and stopping unwanted air from being drawn into the flue.

It is listed under the gaskets, o-rings, seals and washers group and is used across the Worcester Boulter Bonus and Camray 5 ranges.

• Visible cracking, hardening or flattening of the gasket material around the flue joint
• Soot or staining at the flue connection, suggesting combustion products are escaping
• A smell of flue gases or draughts near the appliance casing
• Combustion readings that drift or fail to settle during servicing
• The gasket breaking up or sticking when the flue is removed for inspection

• Confirm the appliance model and, where available, the GC number against the compatibility list before ordering
• Check the flue size designation matches the 40/140 marking on the existing gasket
• Note the previous number IN47005 and alternative number 1021278 when cross-referencing older documentation
• Have the appliance reassembled and checked by a competent person, as the flue forms part of the combustion circuit
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.