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  2. 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.

  3. Grease trap - Wikipedia

    en.wikipedia.org/wiki/Grease_trap

    In the US, sewers back up annually an estimated 400,000 times, and municipal sewer overflows on 40,000 occasions. [ 5 ] [ full citation needed ] [ 6 ] The U.S. Environmental Protection Agency has determined that sewer pipe blockages are the leading cause of sewer overflows, and grease is the primary cause of sewer blockages in the United States ...

  4. Tap (valve) - Wikipedia

    en.wikipedia.org/wiki/Tap_(valve)

    Turning a valve knob or lever adjusts flow by varying the aperture of the control device in the valve assembly. The result when opened in any degree is a choked flow . Its rate is independent of the viscosity or temperature of the fluid or gas in the pipe, and depends only weakly on the supply pressure , so that flow rate is stable at a given ...

  5. Backwater valve - Wikipedia

    en.wikipedia.org/wiki/Backwater_valve

    The valve contains a flap that allows water to exit the home, but closes to prevent the back flow into the home. [1] Backwater valves commonly activate when a city's sewer lines are unable to handle a large amount of falling precipitation; this puts homes that are tied into the storm lines at risk of having water back flow into them.

  6. Flint water crisis - Wikipedia

    en.wikipedia.org/wiki/Flint_water_crisis

    [9] [10] The city switched back to the Detroit water system on October 16, 2015. [11] It later signed a 30-year contract with the new Great Lakes Water Authority (GLWA) on November 22, 2017. [12] On January 5, 2016, Michigan Governor Rick Snyder declared a state of emergency in Genesee County, of which Flint is the major population center.

  7. Arizona - Wikipedia

    en.wikipedia.org/wiki/Arizona

    This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. U.S. state This article is about the U.S. state. For other uses, see Arizona (disambiguation). State in the United States Arizona State Flag Seal Nicknames: The Grand Canyon State; The Copper State; The Valentine State Motto: Ditat Deus ('God enriches') Anthem: "The Arizona March Song ...

  8. Latro of Laon - Wikipedia

    en.wikipedia.org/wiki/Latro_of_Laon

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  9. Wikipedia:Language learning centre/Word list - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Language...

    Drawing up a comprehensive list of words in English is important as a reference when learning a language as it will show the equivalent words you need to learn in the other language to achieve fluency. A big list will constantly show you what words you don't know and what you need to work on and is useful for testing yourself.