For millions of consumers worldwide, A. O. Smith has delivered innovative hot water solutions for more than 70 years. Our ProLine Series of residential water heaters, sold exclusively through plumbing wholesalers, are built with commercial-grade components, and join our comprehensive line of gas & electric tankless, high-efficiency tank-type, and commercial water heaters. We are a full-solution provider of water heating products — regardless of the application — anywhere hot water is needed, A. O. Smith can provide an energy-efficient solution with maximum value. For more information visit www.hotwater.com.