Since 1953, RainSoft has had one business and one business only?roviding the best posssible water treatment systems for homes. RainSoft started with one location in Bensenville, Illinois. Today RainSoft, a division of Aquion Partners L.P., is an international company with nearly 300 dealers in the United States and 24 other countries. Headquartered in Elk Grove Village, Illinois (suburban Chicago).* Dedicated laboratory, R&D and manufacturing facilities * Rigorous independent testing and certification programs* Exceptional dealer training and support network * Unsurpassed warranties on products and components