eli5, how does a city hot water system work? How does hot water remain heated while traveling through pipes to our faucets?

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Hello everyone, recently my city has been doing some repairs to the city’s hot water system and i was without hot water for about 3 weeks.

That got me wondering, how exactly does this work? I read something about a heating agent but i don’t know what that means. And how does the water stay hot while travelling from the place it gets heated to our homes?

Thanks!

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17 Answers

Anonymous 0 Comments

My best guess would be that it works a lot like an electrical grid but in reverse. Right before the power gets to your home, you have a transformer that lowers the strength of the electricity and distributes it to individual homes.

I’d imagine there would be a similar system but instead there is a local station, like a building with boilers, that raises the temperature of the water right before it gets to your neighborhood. I worked at an apartment complex that had a giant boiler that supplied the hot water to all the apartment buildings. It was a big problem because the hot water would get used up by people bathing in the mornings.

Otherwise I don’t see how hot water would flow from any further away since the water would naturally lose heat by sitting in the pipes and as it travels it loses heat due to thermal dynamics.

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