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Ferroli Sight Glass 25mm 39812550

Ferroli

Ferroli Sight Glass 25mm 39812550

Ferroli 25mm sight glass, part 39812550, for viewing the burner flame through the boiler casing.

Manufacturer part no.
39812550
GC number
372-255
Showing prices

£12.17

£10.14 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 Ferroli 39812550 is a 25mm diameter sight glass used on Ferroli gas boilers. It sits in the appliance casing and allows the burner flame to be viewed during commissioning and servicing. It is a casing component rather than a combustion or hydraulic part.

Signs this part needs replacing

  • The glass is cracked, chipped or missing from the casing.
  • The glass is sooted, discoloured or clouded and the flame cannot be viewed clearly.
  • Condensate or staining is visible around the sight glass seating.
  • The sight glass has come loose or no longer sits correctly in the casing.

Before you order

  • Confirm your boiler model against the fitment list above.
  • Check the existing sight glass diameter measures 25mm.
  • Check the part number 39812550 matches the number on the existing component or the manufacturer's parts list.

Not sure which part?

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