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Viessmann P-Trap 7828289

Viessmann

Viessmann P-Trap 7828289

Viessmann P-trap siphon, part number 7828289, for Vitodens 100-W WB1A 24 and WB1A 30 appliances.

At a glance

  • Appliance family: Vitodens 100-W WB1A
  • Also known as 2321776
Manufacturer part no.
7828289
Showing prices

£27.07

£22.56 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 P-TRAP is a Viessmann condensate siphon (P-trap) supplied under part number 7828289. It forms the water seal on the condensate discharge path of the appliance, holding a body of condensate that prevents flue gases escaping through the drain. It is used on the Viessmann Vitodens 100-W WB1A range.

Signs this part needs replacing

  • Water leaking from the siphon body or its connections during operation
  • Condensate overflowing rather than draining away
  • Visible cracks, splits or distortion in the trap body
  • Evidence of flue gas odour around the condensate drain point
  • Blockage or debris build-up that cannot be cleared by cleaning

Before you order

  • Confirm the appliance model and serial number against the fit list above
  • Check the existing siphon for cracks, scale or blockage before replacing
  • Verify the part number 7828289 matches the marking on the component being removed
  • Isolate the appliance and allow the condensate trap to drain before work begins

Not sure which part?

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