A.Y. McDonald Manufacturing Company
The A.Y. McDonald Manufacturing Company is a Dubuque, Iowa-based manufacturer of Waterworks Brass, Plumbing Valves, Pumps and Water Systems and High Pressure Gas Valves and Meter Bars.
Scottish immigrant Andrew Young McDonald founded the company in 1856. The company was originally located in downtown Dubuque. In 1983, it moved to a new facility in a new industrial park on Dubuque's west end. In 1996 the plant's foundry was expanded so that production of brass castings could be increased. The company also maintains facilities in Albia, Iowa, Elizabethton, Tennessee, and Sparks, Nevada.