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.