Find the source before you pick a valve
Under pressure, every wet floor looks the same. The right first move depends on the source. A sprinkler line, a restroom supply, a roof drain and a flooded truck court have different shutoffs, different people in charge, and different consequences for cleaning and the claim.
The prompts below are simple if-then pairs. They can't diagnose your building. When the picture is unclear, keep people back, record what you see, and bring in qualified help.
Some sources hide. A slab leak from a buried line, condensate from a rooftop unit, a drain backup or groundwater seepage can all wet the floor with no pipe overhead. If the trail goes nowhere, tape the edge of the wet area, check it again in an hour, and call a plumber with leak-detection tools. How fast the wet area grows gives the plumber a head start.
If you see this, consider that
- IfWater is falling from the ceiling in dry weatherThenLook at overhead pipes, sprinkler heads and HVAC condensate. Bring in the fire protection party if sprinklers are involved.
- IfWater is coming through the ceiling during heavy rainThenSuspect the roof or its drains. Protect the stock and stay off the roof.
- IfWater is coming in at the dock doors during a stormThenTreat it as runoff. Lift the pallets and plan for dirty water.
- IfA restroom, break room or water heater area is wetThenLook for fixture stops or branch valves, and watch for electrical hazards.
- IfThe floor is wet and nothing obvious is leakingThenFollow the trail, check pipes along the walls, and consider a slab or underground leak.
Source, shutoff, first question
| Source | How it stops | First question |
|---|---|---|
| Sprinkler line | Control valve, with fire protection input | Do we need a fire watch? |
| Domestic supply | Fixture stop, branch or main valve | Can someone reach the valve safely? |
| Roof or drain | No valve; protection and repair | Who owns the roof? |
| Storm runoff | Barriers and closed doors | How dirty is the water? |
| Water heater or equipment | Equipment supply and power | Is the power isolated? |
Clues in the timing
When the water showed up says something about where it came from.
- Monday morning after a cold weekend
- A pipe may have frozen and split, then leaked once it thawed.
- During or right after rain
- Roof, drain or runoff is the likely source.
- A small, steady spread
- Points to a slow supply leak or a condensate problem.
- A sudden, large flow
- Points to a burst line or a sprinkler release.
Common questions
What if more than one source is involved?
It happens, especially in storms. Handle safety first, then work each source with the right party.
Does the source matter for the claim?
Often. Coverage can turn on the cause, so write down what you saw and when.
General information for Commerce City, not a quote or professional advice. In an emergency, call 911.