About Us

RainSoft is a leading brand of premium solutions that treats, purifies and softens water for homes and businesses. Our residential whole-house air filtration and purification systems provide cleaner, fresher air to any indoor environment. As one of the few totally integrated product lines in the $9.4 billion water quality industry, RainSoft maintains unparalleled excellence from design through to product installation.

Since its introduction in 1953, RainSoft has maintained its quality through research and development—the most cost-effective way available to generate such a wide range of patented, point-of-use water softening and conditioning equipment. RainSoft's commercial and industrial air purification and water softening products are designed and manufactured at our corporate facility in Elk Grove Village, Illinois.


RainSoft serves the diverse needs of a broad spectrum of customers, addressing the needs of their lifestyles and local water conditions. Products range from under-the-counter drinking water systems to massive, institutional treatment systems custom-built for food processing plants, hotels, office buildings, hospitals and factories - even entire communities.

The RainSoft product line includes water conditioners, iron filters, whole-house carbon filters, drinking-water purifiers, ultraviolet disinfection systems, reverse osmosis systems and acid neutralizers, which are available with a variety of options and in different sizes. Each and every product is subjected to rigorous testing for unsurpassed performance and durability. RainSoft offers limited lifetime warranties on the major components of our product line.


An Environmental Protection Agency survey and a Harris Poll both determined that 84% of Americans are concerned about the quality of water provided by their. Despite that concern, water softener and conditioning systems are found in only five million U.S. households (source: Water Quality Association, Lisle, Illinois).

Recognizing that less than 6% of the domestic market has been tapped and that concern for improved water quality is growing, RainSoft views the remaining 80 million American households - not to mention hundreds of millions of homes and businesses around the world - as its potential market.

Dealership Structure

All RainSoft-brand home air purifier and water conditioning products are sold, installed and serviced exclusively by more than 150 authorized, independently owned dealerships throughout the United States and in 20 countries throughout Europe, Asia and the Middle East.

Rainsoft Water Systems

ltrefiner Reverse Osmosis Water Systems

RainSoft's premier drinking water system delivers a generous supply of delicious bottle-quality water for you and your family.

Provides highly polished "ingredient quality" water for drinking and cooking.

Reverse osmosis systems filter out extremely small particles that can slip through less sophisticated drinking water systems. The combination of three filters - pre-filter, RO membrane and post-filter - address almost any water quality concerns.

Installs conveniently under your sink.

Unit is built to industry standards and carries a limited lifetime warranty.

How Ultrefiner Reverse Osmosis Water Systems Work:

Step 1:
Water enters the system inlet valve.

Step 2:
Water is forced through the prefilter cartridge that takes out microscopic particles and polishes the water prior to entering the reverse osmosis membrane.

Step 3:
Water then enters the reverse osmosis cartridge where it is filtered through a spiral-wound, semipermeable membrane.

Step 4:
The resulting highly filtered reverse osmosis water enters a storage tank.

Step 5:
Your reverse osmosis water receives a final polishing through the systems carbon block post-filter, and dispensed through a dedicated RainSoft drinking water faucet.

RainSoft Certifications

Links to certifications that RainSoft has received for our home water treatment and air purification products.

Water Quality Association (WQA) Gold Seal Certifications

RainSoft Filtration Systems
RainSoft Drinking Water Treatment Units
RainSoft Drinking Water Treatment Units - Health Effects
RainSoft Household & Commercial Cation Exchange Water Softeners
RainSoft Reverse Osmosis Units





Rainsoft Q&A

Why RainSoft Water Treatment Systems?

A RainSoft home water filtration system enhances the quality of life for you and your family - in every room of your home where water is used. The kitchen, where food and beverages are prepared and served. The bathroom, where family members bathe, shower and shampoo. The laundry area, where you care for your clothes. Why install a RainSoft home water treatment system? The best reason is that there are so many reasons.

Is there more to your drinking water than just water?
No matter how good your water is at the source, by the time it gets to your home it may have picked up numerous unwanted minerals, chemical compounds and other pollutants.

What your nose, eyes and taste buds could be telling you.
If there's a detectable odor to your water, if it contains visible particles, or leaves a metallic or other "off" taste, you have cause for concern.

Weighing the heavy cost of bottled water.
The costs associated with producing and transporting bottles have a severe impact on our finite oil supply, not to mention the millions of bottles that wind up in landfills every year. Kitchens that have RainSoft drinking water systems installed can make bottle-quality water on demand at the touch of a button.

How to put an end to dry skin and dull looking hair.
Water that isn't softened and conditioned can leave soap and shampoo residue behind, aggravating dry skin and dry hair problems.

If only your pipes could talk.
Minerals and chemical compounds in your water can damage your pipes, restrict water flow and shorten the life of major appliances.

RainSoft can make you a better cook.
With our in home water treatment systems, the fruits and vegetables you wash, and the food and beverages you prepare with the resulting water taste better and look more appealing.

Why detergent companies don't like RainSoft.
RainSoft's super-sudsing action means you'll need less soap, shampoo and detergents for everything from bathing and doing dishes and laundry to cleaning.

You can take it with you.
Your RainSoft in home water treatment system is built to last and carries a limited lifetime warranty, so you can exclude it from your real estate contract and take it to your next home.