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  2. Here's How Often You Should Drain Your Water Heater ... - AOL

    www.aol.com/lifestyle/heres-often-drain-water...

    Draining your water heater is a key home maintenance task you won’t want to ignore.

  3. Water fluoridation - Wikipedia

    en.wikipedia.org/wiki/Water_fluoridation

    Water fluoridation is the controlled addition of fluoride to public water supplies to reduce tooth decay. Fluoridated water maintains fluoride levels effective for cavity prevention, achieved naturally or through supplementation. [2] In the mouth, fluoride slows tooth enamel demineralization and enhances remineralization in early-stage cavities ...

  4. 11 things you should never put down the drain - AOL

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  5. Heat trap - Wikipedia

    en.wikipedia.org/wiki/Heat_trap

    Heat traps are valves or loops of pipe on the cold water inlet and hot water outlet of water heaters. The heat traps allow cold water to flow into the water heater tank, but prevent unwanted natural convection and heated water to flow out of the tank. [1] [2] Newer water heaters have built-in heat traps.

  6. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    A small tank water heater. Water heating is a heat transfer process that uses an energy source to heat water above its initial temperature. Typical domestic uses of hot water include cooking, cleaning, bathing, and space heating.

  7. The two things you should never throw down the drain - AOL

    www.aol.com/lifestyle/2019-09-15-the-two-things...

    There are two items in particular that plumbers signify as the biggest culprit for drain blockages, especially during the holidays. The two things you should never throw down the drain Skip to ...

  8. Water fluoridation in the United States - Wikipedia

    en.wikipedia.org/wiki/Water_fluoridation_in_the...

    The research had two goals: (1) to warn communities with a high concentration of fluoride of the danger, initiating a reduction of the fluoride levels in order to reduce incidence rates of fluorosis, and (2) to encourage communities with a low concentration of fluoride in drinking water to add fluoride in order to help prevent tooth decay. By ...

  9. 9 Things Plumbers Say You Should Never Pour Down the Drain - AOL

    www.aol.com/lifestyle/9-things-plumbers-never...

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