Caleffi MixCal™ Thermostatic Mixing Valve With Check Valve, 521 Series, 1 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, Glycol, Water Media, 2-5/8 in Top to Inlet Center, Adjustable, Pressure Balanced, Thermostatic Valve, Lead-Free, 85 to 150 deg F, 6-1/8 in W x 6-1/4 in H