The Cimm Expansion Vessel for Central Heating is an essential component for any home heating system, offering a practical and efficient solution for maintaining optimal pressure levels. This 24-litre vessel is expertly designed to accommodate the natural expansion of water in a closed heating system, thereby ensuring consistent performance and longevity of your heating setup. Approved to be used with temperature of -10°C. They are also used in air conditioning and refrigeration systems. Compare prices from: Cimm in Heating Appliances