Nobody in Your Building Knows What That Room Does
The riser room is where the whole sprinkler system can be shut off by one person, in about four seconds, with no tools. It is also the least-labelled room in most commercial buildings. This makes a card to tape inside the door.
Take these off the gauges while the system is normal, or off your last inspection report. This is the part of the card that earns its place — nobody in the building currently knows what normal looks like.
Leave anything blank and it prints as a line to write on. Print it, and tape it inside the door where somebody standing in the room will actually see it.
The line that matters most on the card
Do not close any valve in this room. When water is running through a ceiling, the instinct of nearly everybody is to make it stop — and the handle that does it is right there, unlocked, at chest height.
If there is a fire, that water is the only thing fighting it. Closing the valve is the single most damaging action available anywhere in the building, and it is made by well-meaning people who thought they were limiting the damage. The fire department decides when the water goes off. Nobody else.
The rest of the card exists to make that instruction credible. Somebody who can see what the gauges normally read, where the drain goes and who to ring is somebody who has been treated as capable — and they are far more likely to follow the one instruction that counts.
Keep it current
A card with the wrong numbers on it is worse than no card, because people trust it. Reprint it when the monitoring company changes, when the service company changes, or when an inspection tells you the normal pressures have moved. It takes two minutes.