Caleffi Thermostatic and Pressure Balanced Mixing Valve, 521 Series, 3/4 in Nominal, Sweat Connection, Number of Ports/Ways: 3-Ways, 1.3 to 15 gpm Flow Rate, 200 lbf/sq-in, 3 Cv Flow Coefficient (Cv), Brass, +/-6 deg F Gauge Accuracy, Water Service, 2 in Dia Gauge Dial, 30 to 210 deg F Gauge Scale, Lead-Free, 200 deg F Maximum, 39 to 80 deg F Cold Water, 200 deg F Hot Water Inlet, 85 to 150 deg F Adjustable, 5 in L x 5-13/16 in H