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Ferroli Expansion Vessel 39827800

Ferroli

Ferroli Expansion Vessel 39827800

7 litre expansion vessel for Ferroli gas boilers, part number 39827800.

At a glance

  • Also known as 1211879, N5671-1
Manufacturer part no.
39827800
Showing prices

£174.62

£145.52 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 Ferroli 39827800 is a 7 litre expansion vessel designed for use in Ferroli gas boilers. It absorbs the expansion of water as it heats, maintaining stable system pressure and preventing stress on other components. This component is suitable for several Ferroli boiler models, including the Domiproject, Optimax, and Domitech ranges.

Signs this part needs replacing

  • Boiler pressure drops frequently, requiring regular topping up.
  • Water discharges from the pressure relief valve when the system heats up.
  • The expansion vessel feels waterlogged or heavy when disconnected.
  • Visible corrosion or water weeping from the vessel.
  • Boiler locks out or shows a low-pressure fault code.

Before you order

  • Confirm your boiler model and GC number against the list above.
  • Check the existing expansion vessel's part number or capacity to ensure a match.
  • Verify the system pressure and the vessel's charge pressure before fitting.
  • Ensure the boiler is isolated and fully depressurised before replacement.

Not sure which part?

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