Taco Comfort Solutions® Valve, 1/2 in Nominal, NPT Connection, Number of Ways/Position: 2-Ways, 300 psi, 4.9 Cv Flow Coefficient (Cv), Manual Override Button Operator, Brass Stem, Brass Trim, EPDM Disc, PTFE Seat, Brass, Finish: Chrome-Plated, 11.44 W Power Consumption, 50% Glycol, Water Service, Normally Open, 0.48 A, 24 VAC, 1.44 W, VA Rating: 40 VA, 20 to 220 deg F, 4-1/4 in H x 5-5/16 in W x 2-3/8 in D