What is the primary function of a Thermal Expansion Tank?

The primary function of a Thermal Expansion Tank is to keep water pressure stable as temperature rises. When water is heated in a closed system, it expands. This expansion can create excess pressure within the system, potentially leading to issues such as pipe bursts or damage to appliances. The thermal expansion tank serves as a buffer, accommodating this expanded water and maintaining stable pressure within the system.

By providing a designated space for the extra volume of water, the tank helps prevent significant fluctuations in pressure that could disrupt the functioning of the plumbing system. This function is essential in maintaining the integrity and safety of water heating systems, particularly in closed-loop configurations.