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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 the latter method is that 90% of the water can be reused. Pool operators must also store and handle cleaning and sanitation chemicals safely.
Although Graeme drowned, her official cause of death was "suction entrapment due to a faulty drain cover". Following Graeme's death in June 2002, her mother, Nancy Baker, began work to advocate pool and spa safety. She began lobbying Congress to pass legislation to require anti-entrapment drain covers as well as other pool and spa safety devices.
A vortex breaker is a device used in engineering to stop the formation of a vortex when a fluid (liquid or gas) is drained from a vessel such as a tank or vapor–liquid separator. The formation of vortices can entrain vapor in the liquid stream, leading to poor separation in process steps such as distillation or excessive pressure drop, [ 1 ...
Pool drain vortex as viewed from above the water at Grange Park wading pool Underwater view of drain, showing vortex-formation phenomenon. A drain is the primary vessel or conduit for unwanted water or waste liquids to flow away, either to a more useful area, funnelled into a receptacle, or run into sewers or stormwater mains as waste discharge to be released or processed.
Robotic vacuum cleaner on a hardwood floor. A robotic vacuum cleaner, sometimes called a robovac or a roomba as a generic trademark, is an autonomous robotic vacuum cleaner which has a limited vacuum floor cleaning system combined with sensors and robotic drives with programmable controllers and cleaning routines.
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