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  2. San Francisco Fire Department Auxiliary Water Supply System

    en.wikipedia.org/wiki/San_Francisco_Fire...

    Cistern in the Mission District, San Francisco, California. The Auxiliary Water Supply System (AWSS, though often referred to on manhole covers and hydrants as HPFS for High Pressure Fire System) is a high pressure water supply network built for the city of San Francisco in response to the failure of the existing emergency water system during the 1906 earthquake.

  3. High-volume low-speed fan - Wikipedia

    en.wikipedia.org/wiki/High-volume_low-speed_fan

    A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."

  4. Cistern - Wikipedia

    en.wikipedia.org/wiki/Cistern

    The modern toilet utilises a cistern to reserve and hold the correct amount of water required to flush the toilet bowl. In earlier toilets, the cistern was located high above the toilet bowl and connected to it by a long pipe. It was necessary to pull a hanging chain connected to a release valve located inside the cistern in order to flush the ...

  5. Centrifugal fan - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_fan

    A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, or squirrel-cage fan (because it looks like a hamster wheel).

  6. Autonomous building - Wikipedia

    en.wikipedia.org/wiki/Autonomous_building

    The least expensive bulk cistern is a fenced pond or pool at ground level. Reducing autonomy reduces the size and expense of cisterns. Many autonomous homes can reduce water use below 10 US gallons (38 L) per person per day, so that in a drought a month of water can be delivered inexpensively via truck.

  7. January 2025 Richmond water crisis - Wikipedia

    en.wikipedia.org/wiki/January_2025_Richmond...

    Boil-water advisories were issued for all or parts of Richmond city and Henrico, Hanover, and Goochland counties, as well as for 27 people in Chesterfield County. Communication issues between the city and Henrico County, and between the city and its water customers, contributed to response difficulties.

  8. Hot water storage tank - Wikipedia

    en.wikipedia.org/wiki/Hot_water_storage_tank

    Some manufacturers offer an extended warranty kit that includes a replacement anode rod. Because conventional hot water storage tanks can be expected to leak every 5 to 15 years, high-quality installations will include, and most US building/plumbing codes now require, a shallow metal or plastic pan to collect the seepage when it occurs.

  9. Basilica Cistern - Wikipedia

    en.wikipedia.org/wiki/Basilica_Cistern

    Cisterna Basilica is located to the west of Hagia Sophia and is of a similar size. The square on the left of the map marks the location of the Cistern of Philoxenos.. The Basilica Cistern, or Cisterna Basilica (Greek: Βασιλική Κινστέρνα, Turkish: Yerebatan Sarnıcı or Yerebatan Sarayı, "Subterranean Cistern" or "Subterranean Palace"), is the largest of several hundred ...