We combine cutting-edge technology with committed people who take pride in providing the very best support for our customers.

Since 1874, A. O. Smith has carried a legacy of innovation. From our early contributions to the bicycle and automobile industries, to developing and patenting the first glass-lined water heater in 1936, our mission continues today with innovations in residential and commercial high efficiency, smart and tankless water heaters. We pledge to evolve our products to better support our customers’ needs

“WOW! I've had other tankless heaters. This is easily the quietest and fastest in producing hot water. I am really impressed with the features and capability of the unit.�?

For more than 145 years, we’ve developed state-of-the art products that push new boundaries and improve the lives of our customers.

Control of reduced pressure is adjustable from about 90% of inlet pressure to any lower pressure above 100 kPa, and will maintain that pressure regardless of fluctuations in inlet pressure or capacity demands.

The ‘ROMA’ Type R Pressure Reducing Valve is a pilot-operated, full bore, single seated valve capable of passing larger quantities of steam or air than a direct-acting type of equal size.

“Great features, easily adjustable temp settings. Product was as described, compact unit that fit in the mechanical closet as needed. Startup of the unit was simple and easy.�?

Rebate and incentive programs provide savings to consumers for the purchase of water heaters that meet certain energy efficiency standards.

A. O. Smith is a leading manufacturer of both residential and commercial water heating technologies, including the #1 most specified commercial water heater.

A. O. Smith, a leader in water heating and water treatment solutions, is proud to announce its 2023 ENERGY STAR® Partner of the Year Sustained Excellence Award from the U.S. Environmental Protection Agency and the U.S. Department of Energy.

The reduced pressure acting upon the diaphragm balances the adjustable regulating spring loading. As the reduced pressure falls, the spring forces open the pilot valve to allow upstream pressure to be imposed upon the piston.

The A. O. Smith ProLine® family of water heaters offers a wide range of innovative solutions for your unique lifestyle needs. Discover which product line meets your needs below.

Our products are put through rigorous quality and endurance testing so now matter where hot water is needed, A. O. Smith can provide a solution you can count on.

The piston in turn forces the main valve open, thus supplying more steam to the downstream line to maintain the required downstream setting.