Product Information: The expansion vessel is a small tank that is utilised to protect closed water systems from pressure surges. The tank is filled with air that acts as a cushion against surges in pressure within the system.
This part is present in 3 different boilers in the Saunier Duval range including the Saunier Duval ISOMAX F 28 E , ISOMAX F 28 E2 , ISOMAX F 28 E2 .