[fintstone]

A good system lets very little sodium into the water as iyt uses the salt mostly for cleaning a filterbed. If you see the salt as a problem, many systems will also work with potassium instead. If you have a unit installed in your house, you most likely need one and will see a significant difference if you do not ontinue its use. Most houses with systems are plumbed so that the cold kitchen water comes off another circuit. The typical thing to do is to put a reverse osmosis unit under your sink to filter drinking and icemaker water.