The Robokit Extra 18 Litre Expansion Vessel is a sealed system kit, an essential component for sealed heating systems.

Expansion Vessels from Altecnic are both reliable and cost efficient, giving you peace of mind after installation.

Component siting alternatives allow system flexibility when installing the Altecnic Robokit Extra Expansion Vessel to your system.

Sealed primary central heating systems are the most commonly used form of heating system throughout Europe and the rest of the developed world.

Sealed central heating systems should not be confused with unvented mains pressure hot water systems, which apply only to the secondary hot water supply side of a combined heating and hot water system.