Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Hanicks
Basket
Baxi O-Ring 21.5mm x 3mm Pack of 10 7810658

Baxi

Baxi O-Ring 21.5mm x 3mm Pack of 10 7810658

Baxi O-ring, 21.5mm internal diameter with a 3mm cross-section, supplied as a pack of 10.

At a glance

  • Also known as 1794836
Manufacturer part no.
7810658
Showing prices

£6.08

£5.07 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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

This is a Baxi O-ring measuring 21.5mm with a 3mm cross-section, supplied in a pack of 10. It is a sealing component used on Baxi Combi 2 appliances to prevent water or gas leakage at the joint it seats into. The O-ring is a consumable part and is typically renewed whenever the associated connection is disturbed.

Signs this part needs replacing

  • Visible weeping or dripping at the joint the O-ring seals
  • Water staining or mineral deposits around the connection
  • The O-ring feels hard, brittle or has lost its elasticity
  • Cracks, flattening or a squared-off cross-section on inspection
  • Recurring pressure loss traced to a sealed joint

Before you order

  • Confirm the O-ring dimensions required for your appliance are 21.5mm x 3mm
  • Check your boiler model against the fitment list above
  • Consider how many O-rings the job requires, as they are supplied in a pack of 10
  • Inspect the mating surfaces and joint for damage before refitting

Not sure which part?

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