In January 1996, a select group of investors with more than 50 years of experience in the geothermal marketplace formed Geothermal Supply Company, Inc. (GSC), which produces and fabricates specialty accessories for the geothermal industry. Its mission has been, and remains, to be the leader in the field. GSC is committed to providing the highest quality products, unequaled customer service and a vast knowledge of geothermal technology.

GSC was built on the premise that its purpose is to make customers’ jobs easier, thereby making installing geothermal systems easier. With this as its driving force, it has introduced many innovative products to the industry.

GSC is proud to provide an array of products spanning installation to maintenance. These include fabricated fittings, headers, commercial manifolds and the revolutionary polyethylene vault; products to aid in the installation of geothermal systems, such as purge pumps and fusion accessories; and products to assist in the maintenance of geothermal systems after installation.

GSC holds tightly to its goal of being the geothermal industry’s best fabricator and accessories producer. It does this by applying shared values to anticipate and fulfill the requirements of its domestic and international customers.

In 2024, GSC became a part of the Core & Main family as Geothermal Supply Company, a Core & Main Brand, but still known in the industry as GSC. In this new season, it continues to build on its proud history of delivering inspired solutions to the geothermal industry to help its customers succeed.