What component helps maintain a steady temperature in a hot water system?

A thermostatic mixer plays a crucial role in maintaining a steady temperature in a hot water system. This component is designed to blend hot and cold water to ensure that the water reaching the taps is delivered at the desired, safe temperature. When the water temperature fluctuates, the thermostatic mixer automatically adjusts the proportions of hot and cold water, thus providing consistent comfort and safety to the user. This is particularly important in applications where scalding is a risk or where precise temperature control is essential for efficient hot water delivery.

In contrast, while expansion tanks serve the important function of absorbing excess pressure in a hot water system, they do not regulate temperature. Water meters are primarily used for measuring the volume of water consumed, and pressure gauges are designed to monitor the pressure levels in the system, rather than contributing to temperature stability.