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  2. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    Double trapping is prohibited by plumbing codes due to its susceptibility to clogging. In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure can slow the flow of water leaving the system, resulting in clogs, or cause siphonage to empty a trap. The high point of the vent ...

  3. Glossary of firefighting equipment - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firefighting...

    A Variable Speed (VFD) Fire Pump Controller is a fire pump controller that is able to vary the speed of the motor depending on the demand of the fire pump, resulting in the ability to hold a constant discharge pressure. Ventilation saw A high-powered saw with metal-cutting teeth or disc for quickly making large openings in roofing materials.

  4. Injector - Wikipedia

    en.wikipedia.org/wiki/Injector

    It is a fluid-dynamic pump with no moving parts except a valve to control inlet flow. Depending on the application, an injector can also take the form of an eductor-jet pump, a water eductor or an aspirator. An ejector operates on similar principles to create a vacuum feed connection for braking systems etc.

  5. Vacuum ejector - Wikipedia

    en.wikipedia.org/wiki/Vacuum_Ejector

    A vacuum ejector, or simply ejector is a type of vacuum pump, which produces vacuum by means of the Venturi effect.. In an ejector, a working fluid (liquid or gaseous) flows through a jet nozzle into a tube that first narrows and then expands in cross-sectional area.

  6. Tap (valve) - Wikipedia

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

    The American Society of Mechanical Engineers (ASME) publishes several Standards on plumbing. Some are: ASME A112.6.3 – Floor and Trench Drains; ASME A112.6.4 – Roof, Deck, and Balcony Drains; ASME A112.18.1/CSA B125.1 – Plumbing Supply Fittings; ASME A112.19.1/CSA B45.2 – Enameled Cast Iron and Enameled Steel Plumbing Fixtures

  7. 50 Cats That May Leave You Laughing So Hard You’ll ... - AOL

    www.aol.com/lifestyle/80-adorable-kitty-pics...

    Some people believe that the world is divided into dog and cat people. Of course, there are those that are neither. I personally fall into the dog category. Besides the fact I'm allergic to cats ...

  8. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    The covers usually feature "pick holes", into which a hook handle tool is inserted to lift them. Pick holes can be concealed for a more watertight lid, or can allow light to shine through. A manhole pick or hook is typically used to lift them, though other tools can be used as well, including electromagnets. Painted manhole cover in Osaka, Japan

  9. ‘A truly good man’: Trump, Obama, Bush and Clinton pay ...

    www.aol.com/truly-good-man-trump-obama-004714602...

    The condolences came from Donald Trump, the former and future president who is set to be sworn back into the White House next month, as well as Barack Obama, George W. Bush and Bill Clinton, who ...

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