Caleffi Z-one™ Motorized Zone Valve, 2-Way, Series: Z Series, 1-1/4 in Nominal, C End Style, 300 psi Pressure, 7.5 Cv Coefficient of Volume, 24 VAC, 0.4 A, 32 to 240 deg F Water, 20 psi Differential, Terminal Screw Electrical Connections, Forged Brass