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  3. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    Backflow means the undesirable reversal of flow of a liquid, gas, or suspended solid into the potable water supply; a backflow preventer is designed to keep this from happening. Points at which a potable water system connects with a non-potable water system are called cross connections .

  4. Essential Utilities - Wikipedia

    en.wikipedia.org/wiki/Essential_Utilities

    Essential Utilities (formerly Aqua America and Peoples Natural Gas) is an American utility company that has stakes in Illinois, Indiana, Kentucky, New Jersey, North Carolina, Ohio, Pennsylvania, Texas and Virginia. [2]

  5. Backflow - Wikipedia

    en.wikipedia.org/wiki/Backflow

    Backflow is a term in plumbing for an unwanted flow of water in the reverse direction. [1] It can be a serious health risk for the contamination of potable water supplies with foul water . In the most obvious case, a toilet flush cistern and its water supply must be isolated from the toilet bowl.

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  7. Backwater valve - Wikipedia

    en.wikipedia.org/wiki/Backwater_valve

    A backwater valve is a backflow prevention device used to prevent outbound water through a dwelling's drain pipes from re-entering -- "back flowing"—into a home. The valve contains a flap that allows water to exit the home, but closes to prevent the back flow into the home.

  8. Booster pump - Wikipedia

    en.wikipedia.org/wiki/Booster_pump

    The need for a water pressure booster pump can also arise after the installation of a backflow prevention device (BFP), which is currently mandated in many municipalities [where?] to protect the public water supplies from contaminants within a building entering the public water supply.

  9. Water filter - Wikipedia

    en.wikipedia.org/wiki/Water_filter

    Filters use sieving, adsorption, ion exchanges, biofilms and other processes to remove unwanted substances from water. Unlike a sieve or screen, a filter can potentially remove particles much smaller than the holes through which its water passes, such as nitrates or germs like Cryptosporidium.

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