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Buderus Insulation Casing 73543

Buderus

Buderus Insulation Casing 73543

Insulation casing, Buderus part 73543, for the isolation valve assembly on Buderus 600 series gas boilers.

At a glance

  • Appliance family: Buderus 600 series gas boilers
  • Also known as 2240420
Manufacturer part no.
73543
Showing prices

£122.74

£102.28 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 Buderus 73543 insulation casing is a thermal insulation component that fits around the isolation valve assembly on Buderus 600 series gas boilers. Its purpose is to limit heat loss from the valve body and shield adjacent components from radiated heat. It is supplied under Buderus part number 73543.

Signs this part needs replacing

  • Cracking, crumbling or breakdown of the casing material
  • Heat damage, scorching or discolouration around the isolation valve
  • Casing loose, displaced or no longer seated correctly on the valve body
  • Damp or stained insulation indicating a weep at the isolation valve
  • Casing damaged or broken up during servicing of the valve assembly

Before you order

  • Confirm the boiler model against the fitment list above
  • Check that the existing casing or valve assembly is marked with part number 73543
  • Inspect the isolation valve itself for leaks or seizure, as the casing alone will not correct these faults

Not sure which part?

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