Valve Handle is an item in White Day: ALNS.
It used to open or close the Valve.
You can operate the sprinkler by using it and extinguish a fire.
Three Fire Extinguishers ( A, B, C-Type ) are needed to get it.
It is found in the Storage Room on the left ( The across side of the stage ) at 1st floor of the Auditorium.
This item's location is marked as document.
( Remake : Fire Safety Inspection Result )