Home Fire Sprinklers

A home fire sprinkler can control a fire in its first minutes, giving you precious time to get out. Alongside working smoke alarms and an escape plan, sprinklers greatly reduce the risk of dying in a house fire.

• Homeowners
• Renters
• Builders

How they work

• Pipes connected to the water supply run to sprinkler heads in ceilings or walls.
• Each head has a sealed bulb or link that reacts to heat. When the temperature near that head gets high enough (often around 135 to 165 degrees F), only that head opens and sprays water.
• In most fires, one or two heads control the fire until firefighters arrive.
• Smoke does not set them off, and they do not all go off at once.

Myths and facts

• Myth: all sprinklers in the house go off together. Fact: only the heads near the fire activate.
• Myth: sprinklers go off by accident. Fact: accidental activation is very rare. Heads need real heat, and they can be damaged only by impact or freezing.
• Myth: water damage is worse than fire damage. Fact: a sprinkler uses far less water than a fire hose and limits the fire.
• Myth: smoke alarms are enough. Fact: alarms warn you, but sprinklers help control the fire. Use both. See Smoke & CO Alarms.

Living with sprinklers

• Do not hang items, paint or cover the heads, and keep objects away from them. Do not hang things from the pipes.
• Do not store items closer than the clearance the installer specifies, usually at least 18 inches below the head.
• Protect heads from impact when moving furniture or ladders.
• Know where the shutoff valve is. Shut it only for repairs, then reopen it. An impaired system gives no protection. See Fire System Impairments.
• Keep the system from freezing; heat unheated spaces where pipes run.
• Have the system inspected as recommended by the installer, and test the flow switch or alarm if there is one.

If one goes off

1. Get everyone out and call 911.
2. Do not go back inside until firefighters say it is safe.
3. Firefighters or a qualified person shut off the water after the fire. Call your insurer.

New homes and retrofits

Many areas require sprinklers in new homes. Residential systems follow NFPA 13D (one- and two-family homes) or NFPA 13R. Retrofitting an older home is possible but costs more, and may need a larger water line. Ask a licensed contractor and your local fire marshal. Some insurers offer a discount.

Last updated: October 8, 2026