A thermal expansion tank is a crucial component of a properly functioning water heater system. This vital piece of equipment serves to absorb the increased pressure that results when water is heated in a closed plumbing system. As water heats up, it expands in volume – but in a closed system, there’s nowhere for this expanding water to go. That’s where the thermal expansion tank comes in.
It contains a bladder or diaphragm that can compress, allowing it to absorb the extra water volume and prevent excessive pressure buildup in the plumbing. Without an expansion tank, or if the tank fails, the heated water can put tremendous strain on the water heater, pipes, and valves, potentially causing leaks, ruptures, or even a burst water heater. That’s why it’s so important to have a thermal expansion tank installed and to check it periodically for proper operation.
A waterlogged expansion tank, which has lost its air cushion, can no longer do its job. Signs of thermal expansion tank problems include water leaking from the tank, a water heater pressure relief valve that keeps opening, or mysterious banging or thumping sounds coming from the pipes.
By understanding the critical role the thermal expansion tank plays and ensuring it stays in good working order, you can avoid serious plumbing problems and keep your water heater running smoothly and safely for years to come. If you suspect you might have a problem with your water pressure due to excessive pressure. Give us a call or text to (919)669-8860 or (919)632-6016.
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