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2. Hot tub filter - Wikipedia

   en.wikipedia.org/wiki/Hot_tub_filter

   Cartridge filters routinely filter out particulate down to ca. 5-10 micrometres in size. They have large surface areas enabling them to operate for long periods. Cartridge filter systems also permit better water flow that other filter alternatives [clarification needed] –thus placing less strain on filter pumps. These types of filters are ...

3. Swimming pool sanitation - Wikipedia

   en.wikipedia.org/wiki/Swimming_pool_sanitation

   Other filter media that have been introduced to the residential swimming pool market since 1970 include sand particles and paper type cartridge filters of 50 to 150 square feet (4.6 to 13.9 m 2) filter area arranged in a tightly packed 12" diameter x 24" long (300 mm x 600 mm) accordion-like circular cartridge. These units can be 'daisy-chained ...

4. Salt water chlorination - Wikipedia

   en.wikipedia.org/wiki/Salt_water_chlorination

   Salt water chlorination is a process that uses dissolved salt (1000–4000 ppm or 1–4 g/L) for the chlorination of swimming pools and hot tubs.The chlorine generator (also known as salt cell, salt generator, salt chlorinator, or SWG) uses electrolysis in the presence of dissolved salt to produce chlorine gas or its dissolved forms, hypochlorous acid and sodium hypochlorite, which are already ...

5. Portable water purification - Wikipedia

   en.wikipedia.org/wiki/Portable_water_purification

   A more complete field solution that includes chemical disinfectants is to first filter the water, using a 0.2 μm ceramic cartridge pumped filter, followed by treatment with iodine or chlorine, thereby filtering out cryptosporidium, Giardia, and most bacteria, along with the larger viruses, while also using chemical disinfectant to address ...

6. Circulator pump - Wikipedia

   en.wikipedia.org/wiki/Circulator_pump

   A circulator pump or circulating pump is a specific type of pump used to circulate gases, liquids, or slurries in a closed circuit with small elevation changes. They are commonly found circulating water in a hydronic heating or cooling system.

7. Hot tub - Wikipedia

   en.wikipedia.org/wiki/Hot_tub

   Fiberglass hot tub: glass-reinforced polyester (GRP) hot tubs are made of a plastic matrix reinforced by fine fibers of glass. [citation needed] Inflatable PVC hot tubs. An inflatable hot tub is an air-filled spa structure. Air is pumped into a vinyl skin that expands and creates a solid form. Most commonly round in shape. [17] [18]