Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Hanicks
Basket
Viessmann O-Ring 16 x 3 7831407

Viessmann

Viessmann O-Ring 16 x 3 7831407

Viessmann O-ring measuring 16 x 3, supplied in a pack of five, for Vitodens 050-W and 100-W boilers.

At a glance

  • Also known as 2321670
Manufacturer part no.
7831407
Showing prices

£27.80

£23.17 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

The Viessmann O-ring 16 x 3, part number 7831407, is a circular sealing ring used in Viessmann Vitodens 050-W and 100-W gas boilers. It seals a mating joint within the appliance to prevent water loss at that connection. The part is supplied in a pack of five.

Signs this part needs replacing

  • Water weeping or dripping from the joint the ring seals
  • The ring has flattened, hardened or cracked with age
  • Scale or debris visible on the sealing face
  • Repeated pressure loss that requires regular top-ups

Before you order

  • Confirm the part number 7831407 against the appliance documentation
  • Check the boiler model and serial number against the fit list above
  • Confirm the position and size of the O-ring required on the appliance
  • Note that the part is supplied as a pack of five

Not sure which part?

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