A. O. Smith Corporation is a manufacturing company that produces residential and commercial water heaters for various purposes and locations, including North America, China, Europe, and India. The company operates in North America and Rest of the World segments, offering products under its A. O. Smith, State, Lochinvar, and water softener brands. The distribution of its products includes independent wholesale plumbing distributors, retail channels, and e-commerce, and it also provides other products and parts related to water heating and treatment.