Water softeners are typically IX based (ion-exchange resins), using salt (NaCl) as a regenerant. The conc. of chlorine in drinking water water is typically around 2 ppm. At that level it will not do any harm to a IX based water softner. These softeners are designed to do exactly what the name implies - remove minerals associated with hardness: these include Ca, Mg, Al, and to a lesser degree, Fe.
I suspect whoever told you this mixed his/her terms and was referring to a RO (Reverse Osmosis) system. An RO system will soften your water, but also most other ionic, dissolved and suspended contaminants - including organics. BUT chlorine is very hard on RO (Reverse Osmosis) membranes. Most cellulose acetate RO membranes start to degrade at 2+ ppm Cl.
As a rule - if your water source is deep ground water (i.e. well), you most likely need only a water softener. Unless you are in a fraking zone and then you may need a very good RO
In your water source is surface - i.e. municipal feed from a river or lake, and your water smells a bit, then RO is the way to go (a carbon filter (i.e. Brita) is another choice)
Some municipal waters are hard as well and then you may need an RO or even both - a softner first, followed by a RO.
Also - if you are on a sodium restricted diet, you may want to avoid water softners. A glass of softened water has almost as much sodium as a glass of Coke.
MJuric wrote:
I was reading the other day that Chlorine shortens the life of water softeners.
Also seems they aren't the best at getting chlorine out and those that claim to lose the ability to do so well before they lose their softening ability. OTOH, and maybe I'm not understanding correctly, filters don't filter enough to pull out the hardness of the water, which makes sense since the minerals are dissolved in the water, not chunks.
So do people do both filter and softener or just run a softener. Can you get away with just a filter if the water is not super hard?
~Matt
Remember - It's important to be comfortable in your own skin... because it turns out society frowns on wearing other people's