 COLLIERVILLE, Tenn.--BUSINESS WIRE--Mueller Industries, Inc. NYSE: MLI announced today that it has signed a definitive agreement to purchase the Hart Cooley Flexible Duct business. The acquisition, which is subject to customary closing conditions, is scheduled to close in late January 2021. Mueller Industries Chairman and CEO Greg Christopher commented, The acquisition of Hart Cooley flex products will expand our footprint in the air quality and climate control systems markets, 