Honeywell low voltage (24 volt) zone valve with 1" sweat connection in a straight-through pattern and normally-closed position. It is rate to 3.5 cv, 20 psi close-off pressure, and 200°F maximum operating temperature. These 24 volt ON-OFF zone valves consist of an actuator and valve assembly for controlling the flow of hot water. All models can be installed without disassembling the valve and the powerhead can be removed and replaced from the valve body without draining the system. On the end of the actuator switch is a manual opener for valve operation due to power failure, which will automatically return to auto mode once power is returned.