Saunier Duval Expansion Vessel 6.5L 05168400 – Refurbished

Fluctuating system pressure in a Saunier Duval SD 623 Combi or Thelia 623 boiler is a common sign of a worn expansion vessel. The Saunier Duval Expansion Vessel, 6.5 Litres (Part No. 05168400) is the direct replacement that restores stable closed-system pressure.

This is a professionally refurbished unit, taken from a fully functioning boiler and completely tested by experienced engineers before dispatch.

Compatible Boiler Models

Fully Tested. Reliable Pressure Control. Backed by Warranty.

This refurbished expansion vessel has been completely tested by our experienced engineers, helping restore stable system pressure. Supplied with a full 12-month warranty.

Delivery & Returns

Orders placed before 3:00 PM (Mon–Fri) are dispatched the same working day. Next-day delivery placed on a Friday is delivered the following Monday; Saturday delivery is available at checkout. Returns are accepted within 30 days under our standard return policy.

Note: Please confirm that part number 05168400 matches your existing unit before ordering. Installation must be carried out by a Gas Safe registered engineer to ensure safety compliance and warranty validity. All prices include VAT.

Stock Notice: The source listing shows only 2 units left in stock at time of writing. Confirm live availability before publishing.