Best Salt-Free Softener and Filtration Combo. This whole house water purification system will not only soften your water, it will also filter undesirable contaminants. If you’re only interested in a water softener, no problem, you can buy it separately. The same goes if you’re only interested in the filtration system.
http://www.softwaterfiltration.com/
Usually a water softener is installed in the garage or basement, next to the water heater. The size of the water softener will depend on the amount of water to be softened (and some systems use more than one tank), but many water softeners are anywhere from 3-1/2 to 5-1/2 feet high and 12-26 inches across.
http://home.costhelper.com/water-softener.html
This little beast of a water filter may not look like much, but it packs a punch! It fits neatly on the side of your sink and has 10 stages of filtration. Not only that, it’s designed so you don’t have to change the cartridge until you’ve passed a whopping 1,500 gallons of water through it.
http://www.softwaterfiltration.com/
1 Salt-based units need to have the salt replenished on a regular basis, usually at a cost of anywhere from $2-$15 a month depending on the cost of the salt ($3-$8 per 40-pound bag) and the amount of salt used by your system.  Before buying a water conditioner, find out exactly what impurities are in your water supply.
http://home.costhelper.com/water-softener.html
The information here will deal only with water softeners (filtration systems are usually salt free). On this page I deal with the pros and cons of using a salt free system over one that’s salt based. Hopefully once you’ve finished reading it, you will have a better idea of what will work for you.
http://www.softwaterfiltration.com/
Types of Water Softeners. There are three main types of water softeners, and the type that is chosen will impact cost: • Salt-based softeners range widely in price. Low-end models can be found under $500, while the best salt-based softeners can reach over $2,500. • Salt-free conditioners also tend to range in cost, with prices falling between $1,200 and $3,000. • Magnetic water conditioners tend to be the least expensive option.
http://idahowatersolutions.com/water-softeners/how-much-does-a-water-softener-cost/
Leaks in Water Softeners & Purifiers. The source of a leak in your water system is an important factor in the complexity of the repair. Rates for repairing leaks in softeners and purifiers range between $80 and $210 in the U.S. and vary with the type of leak.
https://www.proreferral.com/hg/water-softener-repair-cost/
The most common feature of a water softener is a timer-based system that will soften water at a set time each day. Other systems are able to soften water as needed. Timer-based water softeners tend to cost less to run, saving homeowners about $100 per year.
http://idahowatersolutions.com/water-softeners/how-much-does-a-water-softener-cost/
The cost of installation will depend on the type of water softener that is chosen, but most plumbers charge a fee of about $600 for this service. Smaller water softeners that take a short time to install may only require an installation fee of $100.
http://idahowatersolutions.com/water-softeners/how-much-does-a-water-softener-cost/
Ion-exchange water softeners start around $400-$1,000 for a basic unit. Installation costs range from $100-$500 (depending on the type of equipment, ease of access and whether you need to add new piping and a suitable drain for the unit) for a total cost of $500-$1,500 for basic water softener in an average-size home.
http://home.costhelper.com/water-softener.html
cost of water softener and filter
Ion-exchange water softeners start around $400-$1,000 for a basic unit.