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  2. 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 ...

  3. 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.

  4. Backflow prevention device - Wikipedia

    en.wikipedia.org/wiki/Backflow_prevention_device

    Backflow prevention device. The simplest, most reliable way to provide backflow prevention is to provide an air gap.An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool.

  5. List of components of oil drilling rigs - Wikipedia

    en.wikipedia.org/wiki/List_of_components_of_oil...

    Rotary table (#20) rotates, along with its constituent parts, the kelly and kelly bushing, the drill string and the attached tools and bit. Shale shaker (#2) separates drill cuttings from the drilling fluid before it is pumped back down the wellbore. Stand (#16) is a section of 2 or 3 joints of drill pipe connected and stood upright in the ...

  6. Why we need vitamin D — and sun exposure isn't the only way ...

    www.aol.com/lifestyle/why-vitamin-d-sun-exposure...

    Strong bones and osteoporosis prevention might be vitamin D’s claims to fame, but they’re not its only specialty. According to the National Institutes of Health, the nutrient helps your immune ...

  7. 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.

  8. New York, Michigan brace for lake-effect snow that could ...

    www.aol.com/news/york-michigan-brace-lake-effect...

    As flakes began flying Friday, New York state forecasters warned 4 to 6 feet of blowing and drifting snow could fall in Watertown and other areas east of Lake Ontario through Monday.

  9. 'I'm a doctor — here's the wellness routine I follow for a ...

    www.aol.com/im-doctor-heres-wellness-routine...

    Dr. Sajad Zalzala, chief medical officer of AgelessRx in Michigan, helps people live their longest, healthiest lives. He shares his wellness routine with Fox News Digital.

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