Expansion tank Cal-Pro 35 by Zilmet, with a capacity of 35 liters. Every liquid, solid, or gas material expands when heated (i.e., its volume increases) and contracts when cooled. In heating systems, the water that circulates continuously heats up and cools down, leading to its constant expansion and contraction. When the water expands, the amount in liters automatically increases, and if the extra liters are not stored somewhere, they will increase the pressure to high and dangerous levels. At this point, the expansion tank intervenes, which is responsible for storing the extra liters created after the expansion.

It is installed vertically, which helps save space.

Finally, choosing the right size tank depends on many factors, such as the water content of the entire installation, the system pressure, the total height of the installation, etc. In any case, before making a purchase, you should consult a specialized engineer to recommend the best solution.