Mueller is a global leader in the design and manufacture of premium-performance valves, protection devices, and brass fittings to the commercial HVAC and refrigeration industries. 

Mueller Refrigeration products provide optimum performance and enhanced serviceability. These products are manufactured in Tennessee, USA to the highest standards for HVACR. Products available are check valves, pressure relief valves, and change over manifolds and CO2 rated copper tube and fittings.