After the sprinklers put out a fire: the first week in a Maryland house.

Most of what is written about home sprinklers is about whether to have them. Almost nothing covers the week after they work. A pan fire in a Charles County kitchen, one head opens, the fire is out before the engine turns onto the street, and the family is standing in the driveway with a wet house and no idea what happens next. This is the sequence we walk people through when they call us that night. Our guide on accidental discharge covers a head that opened with no fire. This one is for the head that did its job.

The first hour

1. Everyone out, 911 called, even if the fire looks out. The fire department needs to confirm it is out, check the walls and ceiling for extension, and clear the house. They will do that whether or not you called, because the alarm company or a neighbor will.
2. The control valve gets closed. Usually the crew does this, because they carry the wrench and they know where a 13D riser lives. If they leave it open, close it yourself once they say the fire is out. It is the valve on the riser, in the basement or the utility closet, and it turns clockwise. The water stops in a few seconds.
3. Power off to the affected area at the panel if water reached outlets or fixtures. Water from a single head runs about 13 gallons a minute, so ten minutes of flow is a lot of water on a floor and into the ceiling below.
4. Photograph everything before anything is moved. The head that opened, the fire damage, the water line on the walls, the contents. The claim and the fire report both lean on those photos.

The fire report

A fire that involved a sprinkler activation gets a report. The county fire marshal or the responding department’s investigator will want to know what burned, what stopped it and whether the system performed as designed. In Anne Arundel and Baltimore County that is the county Fire Marshal’s office. In Howard County it is the Office of the Fire Marshal within the fire department. The investigator may ask to keep the operated head. Let them. It is evidence that the system worked, and the replacement head is a standard part.

Ask for the incident number before the crew leaves. Your insurer will ask for it, and the fire report is the document that establishes the fire as the cause of the water damage, which matters for how the claim is handled.

The system is out of service until it is fixed

With the valve closed, the house has no sprinkler protection. Every head that opened has to be replaced before the valve goes back on, and in a fire the list is often longer than the heads that actually flowed. NFPA 25, the maintenance standard, calls for replacing any head that was exposed to the fire, meaning heads near the fire that got hot enough to weaken the bulb or link but not hot enough to open, and heads coated in soot or smoke residue. On a kitchen fire that usually means the head over the range plus one or two neighbors. On a bedroom fire that got into the hall it can be four or five.

The replacement is a repair, quoted per job. The contractor drains what is left in the system, swaps the heads with the same make, model, orifice and temperature rating, checks the pipe near the fire for heat damage, refills, bleeds the air, brings the system back to pressure, and tests the flow switch and the bell. If the fire reached the piping, especially CPVC in a ceiling that got hot, sections of pipe come out too. Our guide on sprinkler head replacement covers what the swap involves in a house that was not on fire.

Do not open the valve yourself with a missing head. The pipe is open where the head was, and the system will flood the room again. If you need the domestic water back on before the sprinkler contractor arrives and you have a standalone system, the sprinkler valve can stay closed while the house main is open. If you have a multipurpose system, where the sprinklers share the PEX with the faucets, the open head has to be plugged or the whole house stays off. Our guide on multipurpose vs standalone systems explains how to tell which one you have.

Living in the house in the meantime

A house with the sprinkler valve closed is a house without sprinklers. Maryland does not have a rule that puts a family out of a single family house while the system is down, but the sensible practice is the same one commercial buildings follow: get the repair scheduled within days, not weeks, keep the smoke alarms working, and do not run the appliance that started the fire until it has been looked at. If the house is a rental, tell the tenant in writing that the system is out of service and when it will be restored. Our guide on sprinklered rentals covers the landlord side.

The water

This is where a sprinklered fire and an unsprinklered fire part ways, and it is worth saying plainly to the adjuster. A single residential head flows about 13 gallons a minute. A fire department attack line flows well over a hundred. A fire held by one head for five minutes before the valve was closed put a few dozen gallons in the room. The same fire without sprinklers, by the time the engine arrived and got water on it, would have put hundreds of gallons through the house on top of the fire damage. Homeowners sometimes hear the sprinkler system blamed for the water. The water is the reason there is still a house.

Still, water in a ceiling or under a floor does not dry on its own. Get a restoration contractor in within a day to pull wet drywall, set drying equipment and document moisture readings. Ceiling below the fire room, the subfloor, the cabinet bases and the wall cavities near the head are the spots that get missed and turn into mold by the second week.

The insurance claim

A standard Maryland homeowners policy covers fire and covers the water discharged by a sprinkler system responding to a fire as part of the fire loss. It is not a flood claim and it is not a plumbing claim. Give the adjuster the fire incident number, the photos, the sprinkler contractor’s invoice and the restoration contractor’s moisture log. The sprinkler repair is part of the claim, and so is the head the investigator took.

If your policy carries a sprinkler credit, and many do for houses built since 2015 in Montgomery County and elsewhere, the insurer will usually want to see the system restored and reinspected before the credit continues. The contractor’s return to service report handles that.

Before the contractor leaves

• Every operated and exposed head replaced with the matching model and rating, and the old ones bagged for the investigator or the adjuster.
• The system refilled, pressurized and the gauge reading what it read before the fire.
• The inspector’s test run, with the flow switch and bell confirmed.
• The control valve open, tagged and, if it had a tamper switch, the switch reset.
• A written return to service report with the date, the heads replaced and the pipe checked.

Put that report with the fire report and the claim file. When the house sells, our guide on selling a sprinklered house explains why a buyer’s contractor will ask about it, and a fire that one head stopped is a better story than most sellers realize.