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2. Water softening - Wikipedia

   en.wikipedia.org/wiki/Water_softening

   A study found the mean concentration of sodium in softened water to be 278 mg/L. [24] In 2 liters of water—the amount of drinking water typically suggested for an average adult, this constitutes about 22% of the recommended sodium intake by the US CDC and may make a difference to those who need to significantly limit their sodium consumption.

3. EPA WaterSense - Wikipedia

   en.wikipedia.org/wiki/EPA_WaterSense

   Specifications for pre-rinse spray valves and water softeners started development as of 2011. [8] [9] In June 2014, WaterSense began the certification of homes, designed to use 20% less water than standard new construction, as well as the accreditation of irrigation professionals for the installation, maintenance, design and auditing of systems ...

4. Dealkalization of water - Wikipedia

   en.wikipedia.org/wiki/Dealkalization_of_water

   In order to justify installation of a dealkalizer on low-pressure boilers, the alkalinity content should be above 50 ppm with the amount of make-up water exceeding 1,000 gallons (approx. 4,000 litres) per day.

5. Backwashing (water treatment) - Wikipedia

   en.wikipedia.org/wiki/Backwashing_(water_treatment)

   Spent backwash water is either discharged without treatment to a sanitary sewer system or is treated and recycled within the plant. [4]: 22.37–22.40 Historically, backwash water was discharged directly to surface water supplies; however, direct discharge is now highly regulated through NPDES discharge permits and is often discouraged.

6. Storage water heater - Wikipedia

   en.wikipedia.org/wiki/Storage_water_heater

   Solar heat is clean and renewable. This is the most modern system. Increasingly, solar powered water heaters are being used. Their solar thermal collectors are installed outside dwellings, typically on the roof or walls or nearby, and the potable hot water storage tank is typically a pre-existing or new conventional water heater, or a water heater specifically designed for solar thermal.

7. California mother, teen son found beaten to death in home as ...

   www.aol.com/california-mother-teen-son-found...

   The bodies of a California mother of three and her 19-year-old son were found dead by her daughter days before the family was set to celebrate Christmas.