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  2. Plumbing fixture - Wikipedia

    en.wikipedia.org/wiki/Plumbing_fixture

    In some occasional cases, a sink may have both a potable (drinkable) and a non-potable water supply. Lavatories and water closets normally connect to the water supply by means of a supply , which is a tube, usually of nominal 3/8 in ( United States ) or 10 or 12 mm diameter ( Europe and Middle East ), which connects the water supply to the ...

  3. Trap primer - Wikipedia

    en.wikipedia.org/wiki/Trap_primer

    A trap primer (or trap seal primer) is a plumbing device or valve that adds water to traps.The water seals in traps are needed to prevent sewer gases from entering buildings, but because this water is exposed to the air, it is subject to evaporation over time in infrequently used floor drains, leading to the release of sewer gas into the environment.

  4. Trap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(plumbing)

    Essentially all plumbing fixtures including sinks, bathtubs, and showers must be equipped with either an internal or external trap. Toilets almost always have an internal trap. A bottle trap, which can be unscrewed for cleaning. Because it is a localized low-point in the plumbing, sink traps also tend to capture small and heavy objects (such as ...

  5. Trapdoor - Wikipedia

    en.wikipedia.org/wiki/Trapdoor

    A trapdoor or hatch is a sliding or hinged door that is flush with the surface of a floor, ceiling, or roof. [1] It is traditionally small in size. [2] It was invented to facilitate the hoisting of grain up through mills, however, its list of uses has grown over time. [3]

  6. Mantrap (access control) - Wikipedia

    en.wikipedia.org/wiki/Mantrap_(access_control)

    An intercom and/or video camera are often used to allow the guard to control the trap from a remote location. In an automatic mantrap, identification may be required for each door, sometimes even different measures for each door. For example, a key may open the first door, but a personal identification number entered on a number pad opens the ...

  7. Illinois - Wikipedia

    en.wikipedia.org/wiki/Illinois

    Illinois (/ ˌ ɪ l ɪ ˈ n ɔɪ / ⓘ IL-in-OY) is a state in the Midwestern region of the United States.It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash and Ohio rivers to its south.