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Viessmann O-Ring 7817185

Viessmann

Viessmann O-Ring 7817185

Viessmann O-ring with a 316mm internal diameter, listed for Vitodens 200 WB2 appliances.

At a glance

  • Appliance family: Vitodens 200 WB2
  • Also known as 2321468
Manufacturer part no.
7817185
Showing prices

£34.52

£28.77 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 Viessmann O-ring with a 316mm internal diameter, supplied under part number 7817185. It is a sealing component used on Viessmann Vitodens 200 WB2 series appliances, where it forms a watertight joint at the mating face it sits in.

Signs this part needs replacing

  • Water weeping or dripping from the joint the O-ring seals
  • Visible flattening, hardening or cracking of the ring material
  • The ring sitting loose, distorted or partly out of its groove
  • Traces of scale or corrosion staining around the sealing face
  • Repeated pressure loss that persists after the joint is re-tightened

Before you order

  • Confirm the appliance model and serial number against the fitment list
  • Measure the existing O-ring or check the internal diameter marked on the part
  • Inspect the sealing groove and mating face for damage before fitting
  • Check the O-ring is seated correctly and not pinched during reassembly

Not sure which part?

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