Mueller has been providing the refrigeration and air conditioning industry with dependable and innovative products for over 75 years. In the years immediately following World War I, mechanical refrigeration was emerging but equipment was plagued by the leakage of refrigerant gas. Mueller convinced the industry that the solution was in the use of brass forgings instead of porous castings.

Today Mueller manufactures a wide assortment of refrigeration valves including ball, line, compressor, check, and pressure relief as well as an entirely new line of actuated ball valves. Flare fittings, driers, and strainers round out the standard refrigeration and air conditioning product line. Mueller also produces a wide range of custom products for original equipment manufacturers.