Caleffi MixCal™ Thermostatic Mixing Valve With Temperature Gauge, 521 Series, 3/4 in Nominal, MNPT Connection, Number of Ports/Ways: 3-Ways, 1 gpm Flow Rate, 200 psi, 3 Cv Flow Coefficient (Cv), Knob Operator, PPO Seat, EPDM Seal, Brass, +/-6 deg F Gauge Accuracy, 2 in Dia Gauge Dial, Glycol, Water Media, 30 to 210 deg F Gauge Scale, 2-5/8 in Top to Inlet Center, Adjustable, Pressure Balanced, Thermostatic Valve, Lead-Free, 85 to 150 deg F, 6 in W x 8 in H