Elizabeth J. Malcolm

GSW, Inc. makes water products and building products. Through its business segments (GSW Water Heating and American Water Heater), GSW manufactures gas, electric and oil-fired water heaters for residential, commercial and wholesale customers. Its water headers are sold under the American PROline, GSW, John Wood, U.S. Craftmaster and Whirlpool brands. The company's building products business, GSW Building Products, makes vinyl gutters and railing systems under the brands Rain Master, Tufflo and Yardcrafters. A. O. Smith, a company best known for its fan motors, acquired GSW in 2006. GSW is located in Toronto, Canada.