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  2. Swimming pool sanitation - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_sanitation

    Water is forced through a filter and then returned to the pool. Using a water pump by itself is often not sufficient to completely sanitize a pool. Commercial and public pool pumps usually run 24 hours a day for the entire operating season of the pool. Residential pool pumps are typically run for 4 hours per day in winter (when the pool is not ...

  3. Variable displacement pump - Wikipedia

    en.wikipedia.org/wiki/Variable_displacement_pump

    Piston pumps can be made variable-displacement by inserting springs inline with the pistons. The displacement is not positively controlled, but decreases as back-pressure increases. Another variation is the variable-displacement vane pump, a type that has found usage in motor vehicle automatic transmissions, such as the General Motors Hydra-Matic.

  4. Pump - Wikipedia

    en.wikipedia.org/wiki/Pump

    A small, electrically powered pump A large, electrically driven pump for waterworks near the Hengsteysee, Germany. A pump is a device that moves fluids (liquids or gases), or sometimes slurries, [1] by mechanical action, typically converted from electrical energy into hydraulic or pneumatic energy.

  5. Uniform Swimming Pool, Spa and Hot Tub Code - Wikipedia

    en.wikipedia.org/wiki/Uniform_Swimming_Pool,_Spa...

    Designated as an American National Standard, the Uniform Swimming Pool, Spa and Hot Tub Code (USPSHTC) is a model code developed by the International Association of Plumbing and Mechanical Officials to govern the installation and inspection of plumbing systems associated with swimming pools, spas and hot tubs as a means of promoting the public's health, safety and welfare.

  6. Rotary vane pump - Wikipedia

    en.wikipedia.org/wiki/Rotary_vane_pump

    An eccentric rotary vane pump Another eccentric rotary-vane pump design. Note that modern pumps have an area contact between rotor and stator (and not a line contact). 1. pump housing 2. rotor 3. vanes 4. spring. A rotary vane pump is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In ...

  7. “Next Level Friend-Zoning”: US Open Captures Moment Date ...

    www.aol.com/lifestyle/no-way-not-seinfeld-scene...

    Image credits: Cristina Anne Costello/Unsplash The man, who was left with two drinks, glanced at the woman and looked confused when he sat down. It remains reportedly unclear if they knew each other.

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