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A.Y. McDonald Mfg. Co. has been known in the gas industry for its wide variety of house piping valves, gas meter valves, and curb valves.

AY McDonald logoA.Y. McDonald Mfg. Co. is a leading manufacturer of: waterworks brass; plumbing valves; pumps and water systems; and high pressure gas valves and meter bars.

The company has distinguished itself with a proud tradition of quality and reliability since its founding in 1856.

Mission Statement

The mission of A.Y. McDonald Mfg. Co., in the words of their founder, is “to make good products and sell them honestly.” The stockholders and employees accomplish this by extending the McDonald family culture through excellent customer service and by focusing on customers’ needs.

Customers like to buy from A.Y. McDonald Mfg. Co. Why?

  • The customer is “the boss,” and every effort is exerted to exceed expectations
  • Customer service is the number one priority.
  • Customers find quality products linked with outstanding people.


The latest design and manufacturing technology, and product research and development are continually at work at A.Y. McDonald Mfg. Co.

Their engineers design using PRO/E 3-D modeling and CADKEY software. State-of-the art CAD/CAM equipment is used throughout their plants to produce products to the most precise specifications and tolerances. Research and development is a primary focus as they seek to not only meet and exceed customers’ current needs, but also anticipate future industry trends.

A.Y. McDonald Mfg. Co. continues to be committed to the industries it serves by investing the necessary capital expenditures to continually meet the evolving needs of the customer.


A.Y. McDonald Mfg. Co. Corporate headquarters, brass foundry and main manufacturing plant are located in Dubuque, Iowa. They also have locations in Albia, IA; Elizabethton, TN; and Sparks, NV.

A.Y. McDonald products that we carry: