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Saunier Duval expansion vessel S004002563, Icon 23T / Betacom

Saunier Duval

Saunier Duval expansion vessel S004002563, Icon 23T / Betacom

Genuine Saunier Duval expansion vessel (S004002563) for the Icon 23T, Betacom 24 and Betacom 30, absorbing pressure surges in the sealed heating system.

At a glance

  • Also known as 1416009
Manufacturer part no.
S004002563/SD
Showing prices

£249.12

£207.60 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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

An expansion vessel for Saunier Duval sealed-system boilers. It contains an air-filled bladder that cushions pressure surges as the heating water expands when hot, protecting the system from over-pressurising.

Signs this part needs replacing

  • System pressure keeps creeping up or the pressure relief valve keeps discharging
  • Vessel feels waterlogged, heavy and without give, rather than a springy air cushion
  • Visible corrosion or a leak from the vessel itself
  • Frequent need to re-pressurise the system between services

Before you order

  • Isolate and depressurise the system before removal
  • Check the vessel's pre-charge pressure against your system's requirements when refitting
  • Match the part number on your existing vessel to S004002563

Not sure which part?

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