In any closed water system, there is bound to be a change in pressure and for this reason, Thermal Expansion Tank is crucial in facilitating changes in pressure. This gadget receives the volume of water that results from changes in temperature so that the system works effectively and without any danger. It is useful in avoiding pressure build-up- up which in-turn causes cracks or leakage on the pipes. This Thermal Expansion Tank is a vital part of the heating system since its well-built and performs consistently to help enhance the durability of the system.