An expansion vessel is necessary to absorb the expansion of the solar fluid when high temperatures are reached in the solar collector.
Currently available in 24 and 35 litres
The Expansion vessel is accompanied by a fixing kit which includes check valve, wall bracket and 1 flexi hose. This item is SOLD SEPARATELY
The Solar Intermediary Vessel is used to cool the high temperature fluid before it enters the expansion vessel. It protects the expansion vessel diaphragm for the very high temperatures which are experienced during periods of stagnation (SOLD SEPARATELY)