According to Contractor Magazine, American Water Heater, purchased by the company A.O. Smith in 2002, is the manufacturer of both U.S. Craftmaster and American PROLine water heaters. A.O Smith also purchased GSW, Inc., the parent company of American Water Heater, in 2006 for $340 million.
U.S. Craftmaster offers a variety of electric and gas water heaters as well as tankless water heaters, pump and expansion tanks, portable tanks, hydronic tanks and replacement parts for commercial and residential properties. The warranty for U.S. Craftmaster gas water heater models ranges from six to 12 years, and the warranty for the electric water heater models range from six to 12 years .