Worcester Bosch O-Ring 16mm x 3mm 87161072250

This is a Worcester Bosch O-ring with a nominal size of 16mm x 3mm, supplied under part number 87161072250. It is a moulded sealing ring used at a joint or union inside the appliance, where it compresses to stop water or gas escaping past the mating faces. It belongs to the Worcester Bosch range of gaskets, O-rings, seals and washers and is listed against the Greenstar and British Gas appliance families.

• A weep or drip at the joint the O-ring seals, often visible as a trace of water or staining around the union.
• A pressure drop on the system gauge with no other obvious cause.
• The ring looks flattened, hardened, cracked or swollen once the joint is opened.
• Scale or corrosion debris sitting in the seal groove, preventing the ring from seating properly.
• A slight smell of gas at a sealed joint on the gas-carrying side of the appliance.

• Check the GC number and model on the appliance data badge against the compatibility list, as the same O-ring size is used across several variants.
• Confirm the number on the old part or the parts list matches 87161072250 or 1021062 before ordering.
• If the joint is being opened for another repair, check whether any adjacent gasket or seal also needs renewing at the same time.
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.