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Vokera 8 Litre Expansion Vessel 20034320

Vokera

Vokera 8 Litre Expansion Vessel 20034320

8 litre expansion vessel for Vokera Compact 29A DIN ERP and Sabre HE PLUS boilers, part number 20034320.

At a glance

  • Also known as 1533872
Manufacturer part no.
20034320
Showing prices

£122.00

£101.67 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 Vokera 20034320 is an 8 litre expansion vessel used in Vokera gas boilers. It absorbs the volume increase of water as the heating circuit heats up, limiting pressure rise within the sealed system. It is listed under expansion vessels within gas boiler spares.

Signs this part needs replacing

  • System pressure rises sharply as the boiler heats up and falls again once it cools.
  • The pressure relief valve discharges water during normal heating cycles.
  • The pressure gauge reads high with a cold system, or the vessel feels heavy or waterlogged when checked.
  • Pressure is lost repeatedly and the system needs frequent topping up.
  • Water is found at the vessel's air charge point when the valve is depressed.

Before you order

  • Confirm your boiler model against the fitment list above.
  • Check the capacity marked on the existing vessel matches 8 litres.
  • Verify the vessel's connection type and mounting arrangement on your appliance before removal.
  • Isolate the appliance and depressurise the system before work begins.

Not sure which part?

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