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We refer you to one of our favorite sources, HowStuffWorks.com, which features a great section on water towers. Water towers are very simple structures -- large, elevated containers of water. The height of the tower, coupled with the massive amounts of water contained therein, create water pressure. Water towers don't hold all of a town's water -- they generally hold just a day's worth. The water in your tap usually starts off in a reservoir, travels to a treatment plant, then is pumped into the water system. Any extra water that isn't needed travels up into the water tower. Water towers act as back-up tanks during peak usage hours. They're also incredibly effective during fires, when the water system is overloaded. If you
live in a town with a water tower, chances are your fire insurance premium is lower. The famous water towers on the roofs of New York City create water pressure for buildings higher than six stories.
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