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2. Water softening - Wikipedia

   en.wikipedia.org/wiki/Water_softening

   This ten-minute process flushes out solids, and expands the resin bed. Brine draw: Water is directed through a jet pump, which pulls salt water from the brine tank, before the water and brine pass through the resin bed in the normal direction, if co-current, or in the reverse direction, if counter-current. [12]

3. 8 Home Depot Items That Have Major Customer Complaints - AOL

   www.aol.com/9-home-depot-items-major-000008529.html

   The RIDGID heavy-duty drywall screwdriver receives its fair share of complaints from Home Depot customers. Common reasons for dissatisfaction included that it needed to be readjusted frequently or ...

4. Dealkalization of water - Wikipedia

   en.wikipedia.org/wiki/Dealkalization_of_water

   Like water softeners, dealkalizers contain ion-exchange resins that are regenerated with a concentrated salt solution - NaCl. In the case of a water softener, the cation exchange resin is exchanging sodium (the Na + ion of NaCl) for hardness minerals such as calcium and magnesium. A dealkalizer contains strong base anion exchange resin that ...

5. Electrodeionization - Wikipedia

   en.wikipedia.org/wiki/Electrodeionization

   Electrodeionization installation scheme. The typical EDI installation has the following components: electrodes, anion exchange membranes, cation exchange membranes, and resin. The simplest configurations comprise three compartments. To increase production intensity or efficiency, the number of compartments or cells can be increased as desired.

6. Water heat recycling - Wikipedia

   en.wikipedia.org/wiki/Water_heat_recycling

   Installation of a double-walled copper-on-copper heat exchanger in a vertical section of the master drain line in a Canadian home (2007) Water heat recycling (also known as drain water heat recovery, waste water heat recovery, greywater heat recovery, [citation needed] or sometimes shower water heat recovery [citation needed]) is the use of a heat exchanger to recover energy and reuse heat ...

7. Water purification - Wikipedia

   en.wikipedia.org/wiki/Water_purification

   Groundwater: The water emerging from some deep ground water may have fallen as rain many tens, hundreds, or thousands of years ago. Soil and rock layers naturally filter the ground water to a high degree of clarity and often, it does not require additional treatment besides adding chlorine or chloramines as secondary disinfectants.