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  2. Swimming pool service technician - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_service...

    Certification can be obtained through various organizations, including the National Swimming Pool Foundation. There are approximately 15 million residential pools and spas in the United States, and about 400,000 commercial and public swimming pools. [4] [5] The two service industry trade organizations boast of having about 15,000 members. These ...

  3. Automated pool cleaner - Wikipedia

    en.wikipedia.org/wiki/Automated_pool_cleaner

    In 2002 the first handheld/extended reach, battery-powered pool and spa vacuums were finally invented. They now come in many sizes for all applications. Typical electric robotic pool cleaner Weda B480 robotic commercial pool cleaner for the largest public pools. They now come in many smaller sizes from several manufacturers with a wide array of ...

  4. Swimming pool - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool

    Commercial spas are common in the swimming pool area or sauna area of a health club or fitness center, in men's clubs, women's clubs, motels and exclusive five-star hotel suites. Spa clubs may have very large pools, some segmented into increasing temperatures. In Japan, men's clubs with many spas of different size and temperature are common.

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  6. Swimming pool sanitation - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_sanitation

    It was estimated that a commercial-size swimming pool of 220,000 gallons would contain about 20 gallons of urine, equivalent to about 2 gallons of urine in a typical residential pool. [ 6 ] Pathogenic contaminants are of greatest concern in swimming pools as they have been associated with numerous recreational water illnesses (RWIs). [ 7 ]

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