A.Y. McDonald Mfg. Co. is a major manufacturer of products for water works, high pressure gas valves for utilities, water pumps and industrial valves. The company is privately owned and has a history of quality products since its founding in 1856. A.Y. McDonald Mfg. Co. is located in Dubuque, Iowa. Its north central location provides easy access to major markets. In fact, the Company sells and distributes its major product lines nationally and internationally.