Taco Comfort Solutions® Heat Motor Zone Valve, 570 Gold Series, 1-1/4 in Nominal, Sweat Connection, Number of Ways/Position: 2-Ways, 10 to 16 gpm Flow Rate, 125 psi, 7.2 Cv Flow Coefficient (Cv), Brass/Polymer Seat, Bronze, Normally Open, Normally Closed, 0.9 A, 24 V, 40 to 240 deg F, 3-7/8 in L x 2 in W x 4-13/16 in H