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Alpha Gasket 1.034405

Alpha

Alpha Gasket 1.034405

Alpha flue gasket, 18.5 mm x 11.5 mm x 2 mm, part 1.034405, for InTEC 2, E-TEC, ECO 2 and Evoke gas boilers.

At a glance

  • Also known as GASKET-18-5X11-5X2, 1250502
Manufacturer part no.
1.034405
Showing prices

£25.81

£21.51 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 gasket measures 18.5 mm x 11.5 mm x 2 mm and is supplied as part number 1.034405. It is a flue component used across the Alpha InTEC 2, E-TEC, ECO 2 and Evoke gas boiler families. The gasket seals its joint within the flue assembly, helping to maintain a gas-tight path for products of combustion.

Signs this part needs replacing

  • The gasket is cracked, brittle or flattened when inspected
  • Staining or discolouration around the flue joint suggests a seal is failing
  • Combustion readings fall outside the expected range for the appliance
  • A smell of flue products is noticeable near the joint
  • The gasket is missing or has shifted out of position during service

Before you order

  • Confirm your boiler model and GC number against the fitment list above
  • Compare the dimensions with the gasket removed from the appliance
  • Check the manufacturer's instructions for any additional seals or fixings required at the same joint
  • Isolate the appliance before starting work

Not sure which part?

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