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Biasi Expansion Vessel BI1182105

Biasi

Biasi Expansion Vessel BI1182105

Expansion vessel for Biasi Riva and Garda gas boilers, absorbing pressure changes in the sealed heating system.

At a glance

  • Also known as 1650275
Manufacturer part no.
BI1182105
GC number
E94-576
Showing prices

£79.08

£65.90 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 Biasi BI1182105 is an expansion vessel for Biasi gas boilers. It is fitted within the sealed heating circuit to absorb the expansion of water as it heats, limiting the pressure rise in the system. This component is used across the Biasi Riva and Garda boiler families.

Signs this part needs replacing

  • System pressure rises sharply when the boiler is running and falls when cold.
  • The pressure relief valve discharges water, often from the discharge pipe outside.
  • Boiler pressure needs frequent topping up.
  • Pressure gauge readings fluctuate widely during heating cycles.
  • Water is present around the vessel or its connection point.

Before you order

  • Check your boiler model and GC number against the fitment list above.
  • Confirm the part number on the existing vessel is BI1182105.
  • Compare the connection size and mounting arrangement with the removed part.

Not sure which part?

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