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Alpha Flue Connection Flange Seal 1.020369

Alpha

Alpha Flue Connection Flange Seal 1.020369

Flue connection flange seal for Alpha gas boilers, part 1.020369, used at the flue connection joint.

At a glance

  • Also known as FLUE-CONNECTION-FLANGE-SEAL, 1258217
Manufacturer part no.
1.020369
Showing prices

£14.08

£11.73 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 Alpha 1.020369 is a flue connection flange seal for Alpha gas boilers. It fits at the flue connection flange joint, sealing the joint to stop flue gases and condensate escaping at that point. It is a serviceable gasket-type component used during flue assembly and repair.

Signs this part needs replacing

  • Visible cracking, hardening or flattening of the seal
  • Flue gas smell or leakage detected around the flue connection flange
  • Condensate weeping or staining at the flange joint
  • Seal deformation or damage found when the flue is dismantled
  • Combustion analysis readings outside the expected range

Before you order

  • Confirm your boiler model and GC number against the fitment list above
  • Check that the part number 1.020369 matches the seal removed from the appliance
  • Inspect the flue connection flange and mating surfaces for damage or distortion
  • Check whether other seals or gaskets in the flue assembly also need replacing

Not sure which part?

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