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'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.

Barbara has written professionally for more than two decades. In the past five years, she has specialized in creating real estate and home improvement content. Besides writing for Forbes Home, she ...