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  2. Drain-waste-vent system - Wikipedia

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

    In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure from water leaving the system can slow flow (resulting in clogs) or cause a siphon to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.

  3. Blowout preventer - Wikipedia

    en.wikipedia.org/wiki/Blowout_preventer

    The EDS may be a subsystem of the BOP stack's control pods or separate. [citation needed] Pumps on the rig normally deliver pressure to the blowout preventer stack through hydraulic lines. Hydraulic accumulators are on the BOP stack enable closure of blowout preventers even if the BOP stack is disconnected from the rig.

  4. Chimney (locomotive) - Wikipedia

    en.wikipedia.org/wiki/Chimney_(locomotive)

    The difficulty of casting complex spark arrestors encouraged fabrication of sheet metal chimneys for wood-burning locomotives. [5] Fifty-seven of over one thousand locomotive spark arrestors patented in the United States, 1857. Early spark arrestors were simply iron wire screens installed within the stack. However, the screen reduced the rate ...

  5. Trap (plumbing) - Wikipedia

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

    In the United States, plumbing codes usually provide strict limitations on how far a trap may be located from the nearest vent stack. When a vent cannot be provided, an air admittance valve may be used instead. These devices avoid negative pressure in the drain pipe by venting room air into the drain pipe (behind the trap).

  6. Scrubber - Wikipedia

    en.wikipedia.org/wiki/Scrubber

    [5] Removal efficiency of pollutants is improved by increasing residence time in the scrubber or by the increase of surface area of the scrubber solution by the use of a spray nozzle, packed towers or an aspirator. Wet scrubbers may increase the proportion of water in the gas, resulting in a visible stack plume, if the gas is sent to a stack.

  7. 5-ish things to watch in the first round of the College ...

    www.aol.com/5-ish-things-watch-first-110045665.html

    Day and Franklin are both getting a reputation for coming up short in the biggest games and former pros and current TNT Sports analysts Champ Bailey and Takeo Spikes believe Saturday represents a ...

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  9. College Football Playoff: Who has the best odds to win the title?

    www.aol.com/college-football-playoff-best-odds...

    The first 12-team College Football Playoff field was revealed on Sunday. Undefeated Oregon earned the top seed, while SMU beat out Alabama for the 12th and final spot. Oregon, Georgia, Boise State ...

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