Product Information: The expansion vessel is a tank that is utilised to protect closed heating systems from pressure surges. The expansion vessel is filled with air that acts as a cushion against surges in pressure within the system.
This part is present in 13 different boilers in the Saunier Duval range including the Saunier Duval THEMA C 23 , THELIA 623 NC , THELIA 623 , THELIA 23 E NC , THELIA 23 .