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.