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Worcester Bosch Washer 80mm 87110042320

Worcester Bosch

Worcester Bosch Washer 80mm 87110042320

80mm washer for Worcester Bosch Ri, CDi and Greenstar boilers, part 87110042320, used to seal joints in the appliance water circuit.

At a glance

  • Part type: Gasket, O-ring, seal and washer
  • Also known as 1012635
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
87110042320
GC number
H06-246
Showing prices

£15.01

£12.51 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Worcester Bosch 80mm washer is a flat sealing component fitted between mating faces on Ri, CDi and Greenstar appliances. It compresses under load to close the joint and stop water escaping from the section it serves. Washers of this type harden and flatten over time, so they are replaced whenever a joint is broken or a weep appears.

Signs this part needs replacing

  • Water weeping or a visible drip at the joint the washer seals
  • Limescale staining, rust marks or crusting around the mating faces
  • The washer feels hard, brittle or flattened once the joint is opened
  • Repeated small pressure loss with no other obvious source
  • A joint that will not seal again after being disturbed for other work

Before you order

  • Check the appliance GC number or serial plate against the compatibility list to confirm the washer suits your model.
  • Compare the old washer against the 80mm diameter and the previous part numbers listed here before fitting.
  • If the joint also uses an O-ring or gasket, order those at the same time so the assembly can be rebuilt in one visit.
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.