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  2. San Francisco Fire Department Auxiliary Water Supply System

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

    Twin Peaks Reservoir, at near-empty level. The Twin Peaks Reservoir is the backbone of the AWSS system and is located at the top of San Francisco's Twin Peaks hilltop. It is made up of a 10.5-million-U.S.-gallon (40-million-liter) storage reservoir made out of 6-inch-thick (150 mm) reinforced-concrete slabs. Two 750-US-gallon-per-minute (2,800 ...

  3. 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 ...

  4. Air gap (plumbing) - Wikipedia

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

    An air gap, as related to the plumbing trade, is the unobstructed vertical space between the water outlet and the flood level of a fixture. [1] Air gaps of appropriate design are legally required by water health and safety regulations in many countries. An air gap is the simplest form of a backflow prevention device.

  5. Water supply network - Wikipedia

    en.wikipedia.org/wiki/Water_supply_network

    The water is typically pressurised by pumping the water into storage tanks constructed at the highest local point in the network. One network may have several such service reservoirs. In small domestic systems, the water may be pressurised by a pressure vessel or even by an underground cistern (the latter however does need additional pressurizing).

  6. Stormwater detention vault - Wikipedia

    en.wikipedia.org/wiki/Stormwater_detention_vault

    This type of best management practice may be selected when there is insufficient space on the site to infiltrate the runoff or build a surface facility such as a detention basin or retention basin. [1] Detention vaults manage stormwater quantity flowing to nearby surface waters. They help prevent flooding and can reduce erosion in rivers and ...

  7. Equalizing basin - Wikipedia

    en.wikipedia.org/wiki/Equalizing_basin

    Andelsbuch equalizing basin, built in 1908. An equalizing basin (German: Ausgleichsbecken) or equalizing reservoir regulates the flow of water below an intermittently operated hydropower station or peaking power plant. This could be a part-load power station (Teillast-Durchfluss-Kraftwerk) or a storage power station. Also called a balancing ...

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