Award-winning mixing valve


Caleffi, Milwaukee, Wisconsin, earned the 2021 AHR Expo Innovation in the plumbing category with their 520 Series AngleMix thermostatic mixing valve. The domestic hot water tank outlet is piped in-line with the valve’s mixed water outlet, requiring fewer fittings and less space. Union tailpieces are available including press, sweat, NPT, PEX F1960 or F1807 and a different type for each connection can be selected if desired. Tight-closing inlets prevent the temperature from creeping or drooping in recirculation systems. This eliminated the need for bypass/return balancing valves. It is suited for low-flow fixtures, with accurate mixing all the way down to 0.5 GPM.



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