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Alpha Flange Gasket 1.033864

Alpha

Alpha Flange Gasket 1.033864

Flange gasket for Alpha Commercial PRO TEC and Protec NX boiler ranges.

At a glance

  • Appliance family: Alpha Commercial PRO TEC and Protec NX boilers
  • Also known as GASKET-FOR-FLANGE, 1259820
Manufacturer part no.
1.033864
Showing prices

£6.72

£5.60 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 Alpha flange gasket, part 1.033864, is a sealing component for the flanged joint on Alpha commercial boilers. It is fitted between mating flange faces to maintain a leak-free seal on that connection. It is used across the Alpha Commercial PRO TEC and Protec NX ranges.

Signs this part needs replacing

  • Water or staining around the flange joint while the boiler is running
  • Visible weeping or a drip trail at the mating faces
  • Gasket material hardened, flattened, cracked or stuck to the flange face
  • Crusty scale or corrosion deposits gathered at the joint
  • Repeated pressure loss traced to the flanged connection

Before you order

  • Confirm your appliance model against the fit list above
  • Check the flange joint the gasket is intended for and compare the gasket shape with the one removed
  • Inspect the flange faces for pitting or distortion before refitting

Not sure which part?

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