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Heatline Sight Glass D003202233

Heatline

Heatline Sight Glass D003202233

Sight glass for Heatline gas boilers, part number D003202233, superseding earlier code 3003202233.

At a glance

  • Part type: sight glass
  • Also known as 2171170
Manufacturer part no.
D003202233
Showing prices

£19.93

£16.61 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

The Heatline D003202233 is a sight glass for Heatline gas boilers. It provides a visual window into the combustion chamber so a heating engineer can inspect flame condition and combustion during servicing and commissioning. This part supersedes the earlier code 3003202233.

Signs this part needs replacing

  • Cracks, crazing or clouding in the glass
  • Heavy soot staining or discolouration obscuring the view of the flame
  • Moisture or condensation trapped behind the glass
  • A perished, hardened or missing seal around the glass
  • Staining or leakage at the sight glass aperture

Before you order

  • Confirm your boiler model against the fit list above before ordering
  • On VIZO 24 appliances, check the serial number — fitment differs before and from serial number 1062230470
  • Inspect the existing sight glass and its seal so any related parts can be identified at the same time

Not sure which part?

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