McCarl s was founded on a work ethic and dedication to a value system that has kept it in the forefront of its industry and made the company an American success story. The company has been consistently ranked as one of the to 50 mechanical contractors throughout the United States. Founded in 1946, McCarl s sold furnaces and cast iron sinks and offered residential plumbing and heating services. It has since expanded into the industrial and commercial industries, enabled by winning bigger contracts. For more than 60 years, the company has provided mechanical contracting needs to the powerm steel and chemical industries. McCarl s is based in Beaver Falls, Pa.