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2. Swimming pool sanitation - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool_sanitation

   Over time, calcium from municipal water tends to accumulate, developing salt deposits in the swimming pool walls and equipment (filters, pumps), reducing their effectiveness. Therefore, it is advised to either completely drain the pool, and refill it with fresh water, or recycle the existing pool water, using reverse osmosis. The advantage of ...

3. Swimming pool - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool

   An Olympic-size swimming pool (first used at the 1924 Olympics) is a pool that meets FINA's additional standards for the Olympic Games and for world championship events. It must be 50 by 25 m (164 by 82 ft) wide, divided into eight lanes of 2.5 m (8.2 ft) each, plus two areas of 2.5 m (8.2 ft) at each side of the pool.

4. Swimming pool service technician - Wikipedia

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

   Swimming pool service technicians are required to have an understanding of basic water chemistry readings, such as chlorine, pH, alkalinity, stabilizer, and salt levels. [ 11] Additionally, they must have knowledge in maintaining and repairing pool and spa equipment, including filters, pumps, chlorinators, heaters, pool lights, and automation ...

5. Ground-coupled heat exchanger - Wikipedia

   en.wikipedia.org/wiki/Ground-coupled_heat_exchanger

   Ground-coupled heat exchanger. A qanat and windcatcher used as an earth duct, for both earth coupling and evaporative cooling. No fan is needed; the suction in the lee of the windtower draws the air up and out. A ground-coupled heat exchanger is an underground heat exchanger that can capture heat from and/or dissipate heat to the ground.

6. Temu to be investigated by EU tech regulators over sale of ...

   www.aol.com/news/temu-investigated-eu-tech...

   Chinese online retailer Temu will be investigated on whether it may have breached EU tech rules against the sale of illegal products, EU tech regulators said on Tuesday, in a move which could lead ...

7. Automated pool cleaner - Wikipedia

   en.wikipedia.org/wiki/Automated_pool_cleaner

   Automated pool cleaner. 2012 was the Centennial anniversary of the first swimming pool cleaner. R.B. Everson invented the first suction-side pool vacuum 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.