Can I use a thermal expansion tank in a domestic hot water system, or is a standard expansion tank sufficient?

A thermal expansion tank is designed to handle the thermal expansion of water in a closed system, whereas a standard expansion tank is designed to handle pressure fluctuations. In a domestic hot water system, a thermal expansion tank is recommended, as it is specifically designed to handle the thermal expansion of water as it is heated. A standard expansion tank may not be able to handle the rapid pressure changes associated with thermal expansion, leading to inadequate pressure relief and potential system damage.