
Understanding the Role of an Expansion Tank in Your Water Heating System
Key Points An expansion tank absorbs the extra water volume created by thermal expansion, preventing dangerous pressure buildup in your water heater. Without one, excess pressure can activate the relief valve repeatedly, wear out your pipes, and shorten your water heater’s life. Signs you may need an expansion tank include knocking pipes, fluctuating hot water pressure, and frequent pressure relief valve activation. Expansion tanks should be inspected annually — a waterlogged tank can be recharged; a failed bladder usually means replacement. Benjamin Franklin Plumbing of Duncanville offers water heater service with upfront pricing and an on-time guarantee. Have you ever noticed the pressure fluctuation in your water heater and wondered how to mitigate it? What is an expansion tank, and







