What Does an Expansion Tank Do? (2 Minute Explanation)

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QUICK ANSWER: Water heater expansion tanks are designed to absorb high pressure. They are recommended if you would like to get full life out of your water heater and plumbing system.

DETAILS: Your first line of defense against a pressure surge is your pressure regulator. Your second line of defense against high pressure is your thermal expansion tank. When water is heated it will expand. The expanding water creates high pressure in your plumbing system. High pressure is very bad for your water heater and plumbing system in general. It can cause your appliances and pipes to fail prematurely. Premature failure almost always results in water where you don’t want it to be. Keep in mind. If your pressure regulator is not working properly your expansion tank will not work properly. It is best to change them together to ensure that one doesn’t cancel the other out.

BENEFITS: Extends the life of all your appliances and plumbing fixtures in your home. An expansion tank will usually curb water hammer and banging pipes. When used in conjunction with a pressure regulator it will prevent leaky faucets, toilets that fill without flushing, broken ice makers, damaged dishwasher and malfunctioning RO systems.

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