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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 ...

  3. Talk:Zone valve - Wikipedia

    en.wikipedia.org/wiki/Talk:Zone_valve

    It is very common to see manual zone valves with flow meters in zoned hydronic heating systems. https: ...

  4. Area codes 703 and 571 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_703_and_571

    The red-colored area is the northern region of the Commonwealth of Virginia served by area code 703 and its overlay code 571.. Area codes 703 and 571 are telephone area codes in the North American Numbering Plan (NANP) for Northern Virginia, including the independent cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park, as well as all of Arlington and Fairfax counties and ...

  5. 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.

  6. Variable air volume - Wikipedia

    en.wikipedia.org/wiki/Variable_air_volume

    The air blower's flow rate is variable. For a single VAV air handler that serves multiple thermal zones, the flow rate to each zone must be varied as well. Simple VAV terminal unit. A VAV terminal unit, [9] often called a VAV box, is the zone-level flow control device.

  7. List of Saturday Night Live commercial parodies - Wikipedia

    en.wikipedia.org/wiki/List_of_Saturday_Night...

    Taco Bell, and how their Doritos Taco Loco is "a great way to make a quick meal when you have between 8 and 20 children." [92] Franklin's Dog Condoms ("Let your dog keep his balls") [93] Jonathan Zizmor, referring to the tattoo removal specialist as "The Subway Doctor" for his ubiquitous advertising on New York City's subway system. [94]

  8. TacoTime - Wikipedia

    en.wikipedia.org/wiki/TacoTime

    Taco Time (stylized as TacoTime) is an American fast-food restaurant chain specializing in Mexican-American food. [1] [2] The chain has over 226 locations in the United States and 74 locations in Western Canada. [3] [4] It was founded in Eugene, Oregon, in 1960 by Ron Fraedrick. [5] [6] [7]

  9. Tachometer - Wikipedia

    en.wikipedia.org/wiki/Tachometer

    The first tachometer was described by Bryan Donkin in a paper to the Royal Society of Arts in 1810 for which he was awarded the Gold medal of the society. This consisted of a bowl of mercury constructed in such a way that centrifugal force caused the level in a central tube to fall when it rotated and brought down the level in a narrower tube above filled with coloured spirit.

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