AMTROL was founded in 1946 on the premise that innovation, quality and service will be rewarded with customer loyalty and support. In 1954, we revolutionized the hydronic industry when we introduced EXTROL®, the world’s first pre-pressurized diaphragm expansion tank. This was followed in 1963 with the invention of the first pre-pressurized well tank and in 1967 with the invention of the refrigerant gas cylinder. AMTROL went on to invent the indirect fired water heater in 1980 and the thermal expansion tank in 1991. More recently the company introduced the first composite metal LP gas tank in 2005 and has since sold over 1 million of these tanks around the world. Throughout our history, AMTROL has been the world leader in the design and operation of the vital mechanical systems that are used to control hydronic heating and to store potable water.

Today, AMTROL products include water system solutions for storage, treatment, heating, expansion and flow control, along with a host of related HVAC products serving the residential, commercial, and industrial markets. These products are manufactured in our ISO 9001:2015 facilities in Rhode Island, Maryland and Kentucky and internationally in Portugal. To meet the international demand for our products, we operate a sales office in Canada as well as sales offices in Latin America and Europe.

Amtrol was acquired by Worthington Industries in June 2017. Founded in 1955 by John McConnell, Worthington Industries is a leading global diversified metals manufacturing company located in Columbus, Ohio, employs approximately 11,000 people and operates in 84 facilities in 11 countries around the world. Worthington’s philosophy is based on the Golden Rule: “We treat our employees, customers, suppliers and shareholders as we would like to be treated. We encourage our employees to join our philosophy by helping out in the communities where they live and work.”