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Question DetailsAsked on 2/23/2017

The aquasana water system

Is the Aquasana good at getting salt out of water?

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2 Answers



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Answered 3 years ago by Member Services


They make different kinds of systems. Basically, to remove salt, you need either a distillation system, reverse osmosis system, or chemical resin removal ion exchange system.

1) distillation is boiling the water and then recondensing the water vapor to liquid, leaving behind almost all mineral contaminants like salt, and producing quite pure water (except for volatile organic compounds which are vaporized and condense with the water) - basically the process used to produce distilled water.

2) Reverse Osmosis is basically a micro-pore membrane filter that lets water and smaller molecules through but blocks larger ones - so filters out suspended solids and algae and such (though those should be removed by a pre-filter to avoid clogging up the RO membrane), some but not all viruses and bacteria (depending on size), and a large percentage of minerals like salt. They do not remove most organic chemical contaminants, and generally require an oils prefilter if your water has petroleum-based contaminants,, which tend to eat through the RO membranes. However, as the unit gets built up with filterred material, it will typically let more and more salt through - so unless you change the membrane cartridges fairly frequently (perhaps as often as every month or two versus maybe every 2-5 years or so with normal water) as usage goes on the water it produces will hold more and more salt.

3) chemical ion exchange replaces one ion with another - commonly replacing sodium in normal salt with potassium, forming potassium chloride instead - which is generally considered acceptable for people on a low-sodium diet. However, many people find that potassium chloride exchanged (or softened if used in a water softener) has an objectionable chemical taste. (Potassium chloride is the salt used for walk deicing which is less aggressive on concrete than sodium chloride or sea-salt).

Aquasana does make RO units - I could not find a place on their website about ion exchange or distillation units - theirs appear to be purely filtration units, which normally would NOT be effective in removing salt.

You did not say how MUCH salt is in your water - a normal household RO or distillation unit can handle a slightly salty water, but not a true "salt water" or brine such as is commonly found in oilfields or in aquifers connecting with the ocean (or relict ocean waters).

Answered 3 years ago by LCD

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