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  2. Pool suction-drain injury - Wikipedia

    en.wikipedia.org/wiki/Pool_suction-drain_injury

    In 1982, the Consumer Product Safety Commission reported that five children were disemboweled by drains in wading pools and urged pools to install covers on drains. [2] [3] A standard 8 inches (20 cm) main drain can develop up to 350 pounds (160 kg) of force, which could hold a person underwater in tight grip until the suction is released.

  3. Plug (sanitation) - Wikipedia

    en.wikipedia.org/wiki/Plug_(sanitation)

    Plug for a sink. A plug in sanitation is an object that is used to close a drainage outlet firmly.. The insertion of a plug into a drainage outlet allows the container to be filled with water or other fluids.

  4. Virginia Graeme Baker Pool and Spa Safety Act - Wikipedia

    en.wikipedia.org/wiki/Virginia_Graeme_Baker_Pool...

    Virginia Graeme Baker was a seven-year-old girl who drowned when she was trapped underwater by the powerful suction of a hot tub drain. She was simply called "Graeme" and was the second youngest of five daughters including a twin. She was a proficient swimmer for her age and had been able to swim on her own since the age of three.

  5. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    The waste waters eluted from the ion-exchange column containing the unwanted calcium and magnesium salts are typically discharged to the sewage system. [3] Recharge typically takes the following steps: [11] Backwash: Water is directed through the resin in the direction opposite to that of normal flow, and the output is sent to a drain for disposal.

  6. Drying tube - Wikipedia

    en.wikipedia.org/wiki/Drying_tube

    A variety of empty glass drying tubes. When used, they are packed with a desiccant, usually calcium chloride. A drying tube or guard tube is a tube-like piece of apparatus used to house a disposable solid desiccant, wherein at one end the tube-like structure terminates in a ground glass joint for use in connecting the drying tube to a reaction vessel, for the purpose of keeping the vessel free ...

  7. Drain (plumbing) - Wikipedia

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

    A drain cover is a cover with holes (e.g. a manhole) or a grating used to cover a drain, to prevent unwanted entry of foreign objects, or injury to people or animals. It allows drainage of liquids but prevents entry from large solid objects, and thus acts as a coarse filter. A sink drain cover is a drain cover used to cover the sink drain.