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Potterton NXR3 Sight Glass & Gasket COM17078080

Potterton

Potterton NXR3 Sight Glass & Gasket COM17078080

Potterton NXR3 sight glass and gasket for commercial boiler inspection.

Manufacturer part no.
COM17078080
Showing prices

£99.28

£82.73 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 Potterton NXR3 sight glass and gasket is a viewing assembly for the Potterton Commercial NXR3 range of commercial boilers. It provides a sealed observation point through which the combustion chamber or flame can be inspected. The assembly combines the glass viewing pane with its sealing gasket in a single service part.

Signs this part needs replacing

  • Glass is cracked, chipped or clouded, making flame inspection difficult
  • The gasket is perished, hardened or visibly deteriorated
  • Signs of leakage or staining around the sight glass mounting
  • Soot or combustion deposits escaping past the glass seal

Before you order

  • Confirm the boiler is a Potterton Commercial NXR3 and note the section count
  • Check the existing sight glass and gasket against the part number
  • Inspect the mounting face for damage or debris before fitting a new gasket
  • Isolate and allow the appliance to cool before removing the old assembly

Not sure which part?

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