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  2. 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 .

  3. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices, [1] [2] reduced pressure zone assemblies (RPZA), [3] or reduced pressure principle ...

  4. Double check valve - Wikipedia

    en.wikipedia.org/wiki/Double_check_valve

    A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

  5. Atmospheric vacuum breaker - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_vacuum_breaker

    An Atmospheric Vacuum Breaker (AVB) is a backflow prevention device used in plumbing to prevent backflow of non-potable liquids into the drinking water system.. Diagram of Atmospheric Vacuum Breaker in both working states.

  6. Cruise ship stomach bug illnesses hit 12-year high: CDC - AOL

    www.aol.com/news/cruise-ship-stomach-bug...

    More people experienced gastrointestinal illnesses while aboard a cruise ship in 2024 than any other year since 2012, according to data from the Centers for Disease Control and Prevention (CDC).

  7. This Is the Deadliest Foodborne Illness, According to the ...

    www.aol.com/lifestyle/deadliest-foodborne...

    Joining norovirus on a list nobody would want to be a part of is hepatitis A, which ranked second as the most viral. According to the report, it causes 14 million cases of foodborne illness a year ...

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