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Alpha Combustion Chamber Window 1.021232

Alpha

Alpha Combustion Chamber Window 1.021232

Alpha 1.021232 combustion chamber window (ceramic lens D.40) for CD25C, CD28C and CD35C LPG gas boilers.

At a glance

  • Also known as CERAMIC-LENS-D40-CD252835C, 1258317
Manufacturer part no.
1.021232
Showing prices

£17.71

£14.76 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

This Alpha combustion chamber window (ceramic lens D.40) is a boiler component for Alpha CD-series gas appliances. It is fitted to the combustion chamber and provides a viewing point for inspection. The part number is 1.021232.

Signs this part needs replacing

  • Visible cracks, chips or crazing in the ceramic lens.
  • Heavy sooting or staining that cannot be cleaned from the window.
  • Discolouration or heat damage suggesting the lens has been overheated.
  • Signs of leakage or seal failure around the combustion chamber window.
  • Difficulty inspecting the burner flame through the window.

Before you order

  • Confirm the boiler model and GC number against the fitment list.
  • Check the existing window is identified as Alpha part 1.021232 or matches the ceramic lens D.40 description.
  • Verify whether the appliance is an LPG variant where listed.
  • Inspect the combustion chamber area for any related damage before fitting.

Not sure which part?

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