A. O. Smith Corporation was founded in 1874 and is headquartered in Milwaukee, Wisconsin. It is a global leader applying innovative technology and energy-efficient solutions. The company has 35 manufacturing facilities around the world with approximately 16, 000 employees and is listed on the New York Stock Exchange. A. O. Smith (Shanghai) Water Treatment Products Co., Ltd. is founded and wholly owned by A. O. Smith Corporation. It produces and sells a full range of water purification products, including residential and commercial water purification lines, clean water series, central water softener lines, and industrial water treatment equipment lines.Â