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You are here: Home / Science / How does water in the water heater always stay hot even when you use it?

How does water in the water heater always stay hot even when you use it?

March 1, 2020 by Karen Hill

Elementary science, my friend.

Cold water is heavier, so it sinks to the bottom.

The hot water rises to the top, which is also where you’ll find the outflow pipe, the one that goes to your hot water faucet.

As a result, you’ll always be getting the hottest water in the heater.

Most water heaters are large enough that the water in it has enough time to heat up before it flows to your tap or shower head. Even in large families with more than one bathroom, cold water coming out of the hot water tap is rarely a problem.

If it is, your water heater is most likely old and dinky and it’s time to get a new one.

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Filed Under: Science

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.

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