Honeywell Home 24-Volt Hyrdonic Zone Valve

2-way on-off low voltage valves consist of an actuator and valve assembly for controlling the flow of hot water. Manual opener (on all models, except straight-through, normally open valves) for valve operation on power failure; valve returns to automatic position when power is restored. All models may be installed without disassembling the valve.|Compact construction for easy installation|Complete powerhead may be removed or replaced without breaking plumbing line connections or draining the system|Actuator motor may be replaced without removing the valve body or draining the system|Use this valve in closed loop hydronic systems that do not contain dissolved oxygen in system water, such as fresh water from frequent source of makeup water