Question:
i have a Frigidaire Gallery Series refrigerator which has a PureSource2 water filtration system built into it.

i also have a GE water softener installed in my home.

my problem centers on drinking HUGE amounts of water (more than 1Gallon per day easy) due to my high metabolism, so i am concernedabout ingesting "trace" amounts of sodium that might be in therefrigerator drinking water tap...

are filtration systems like the Frigidaire Pure Source designed toremove sodium from a soft-water system, or are they made for cleaningout "larger" particles?

i have read in thie website and others that there are harmless traceamounts of sodium chloride left in the tap water of a soft watersystem...is this right?

Answer: Deionization of water is not the single best purifaction method there is forwater, and other then being the best method for removing dissolvedinorganics, it is the worst method for suspended particulates, disolvedorganics (herbicides, pesticides, resins, etc), microorganisms (bacteria,fungi, algae), viruses & pyrogens (fever producing bacterial cell walls). Ithas to be combined with ultrafiltration, carbon adsorbtion as well asultraviolet oxidation, to get the purity you stated above.

Also, distillation is better then Reverse osmosis at removing dissolvedinorganic solids, and is superior to RO for removing disolved gases,disolved organics, particulates, bacteria and pyrogen. Distillation is alsothe only single method capable of producing reagent grade water (type II),without any other filtration methods. Sometimes RO is used to pretreat thefeed water, so as to avoid higher maintenance of the distillation equipment.And 100% pure water is impossible under any conditions.

"Ultrapure Water- Water with a specific resistance higher than 1 megaohm-cm.In the laboratory, it usually refers to ASTM D1193 Type 1 reagent gradewater. Anything in laboratory water that is not H20 is an impurity. Althoughchemically pure water is NOT attainable, ultrapure water systems are nowcapable of reducing impurities down the limits of detection"