Hydro-Pro 18 expansion tank by Zilmet, with a capacity of 18 liters. Every liquid, solid, or gas material expands when heated (i.e., its volume increases) and contracts when cooled. In water supply systems, the water that circulates continuously heats and cools, leading to its constant expansion and contraction. When water expands, its volume in liters automatically increases, and the additional liters, if not stored somewhere, will increase the pressure to high and dangerous levels. At this point, the expansion tank intervenes, which is responsible for storing the additional liters created after the expansion. It features a special membrane that ensures the water is potable.

It is installed vertically, which helps save space.

Finally, selecting the correct tank size 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 for you.