Sample Brothers Manufacturers Representatives Serving you since 1948 Sample Brothers, Inc., formed in 1948, is a manufacturers representative serving the process, power, pipeline..., marine, and railroad industries. Our 500,000 sq.ft. warehouse, located in St. Louis, MO, stocks thousands of filtration products, as well as maintenance parts for the support... mechanical equipment providing heat transfer and vacuum products, expansion joints, metal hose, mist eliminators, mufflers, compressed air dryers and much more. Our excellent...