Thermal expansion of water and the role of an expansion tank When a water heater is connected to a closed system, an expansion tank must be installed to prevent excessive pressure caused by thermal ...

If you love a good, hot soak in the bath or a steamy shower, you probably have your water heater to thank. Water heaters are ...

If you've had your water heater replaced in the past 10 years you've probably noticed in addition to purchasing a new water heater your plumber informed you an expansion tank or valve was needed.

A reader writes in to say he bought a water heater and expansion tank and had them installed by someone who was not a licensed plumber. The expansion tank was mounted horizontally — just hanging there ...