Residential Sprinklers: Myths and Facts

Fact

           Water damage from a sprinkler system will be much less severe than the damage caused by water from firefighting hoselines or smoke and fire damage if the fire goes unabated. Quick response sprinklers release 8 to 24 gallons of water per minute compared to 50 to 125 gallons per minute released by a firehose.

Sprinklers are highly reliable devices that are activated by heat. They will only go off if there is a fire which increases the heat beyond the sprinkler trigger point (typically 135 to 165°F (57.2 to 73.9°C)). Preaction systems employ additional safety features.

Research has demonstrated that only 1 in 16 million heads ever activates by accident.

Sprinkler systems can be connected to an alarm monitoring company or an external alarm that will notify neighbors or passersby of a water flow. This will facilitate the prompt notification of the fire department and will minimize that amount of water damage.

Myth   

"Water damage from a sprinkler system will be more extensive than fire damage."

Myth   

"When a fire occurs, every sprinkler head goes off."

Fact

           Sprinkler heads are individually activated by fire. Residential fires are usually controlled with one sprinkler head, and 90 percent of all fires are controlled with six or fewer heads. A study conducted in Australia and New Zealand covering 82 years of automatic sprinkler use found that 82 percent of the fires that occurred were controlled by two or fewer sprinklers

Myth   

"Sprinklers are ugly, I don't want them in my space."

Fact

Residential and commercial sprinkler heads come in a variety of unobtrusive styles and models and in designer colors. Some can be mounted flush with the ceiling line, and concealed behind protective covers..

Myth   

"Sprinkler systems are not practical in cold climates, the pipes will freeze and cause water damage."

Fact

In commercial applications, dry pipe and preaction sprinklers provide an alternative to water-filled pipes. Anchorage, Alaska, has had a residential sprinkler ordinance in place for more than 10 years and residents have not experienced a single sprinkler system freeze-up.

Specially molded insulation is available to ensure that piping in unheated attics is properly insulated and protected from freezing.

A variety of sidewall sprinkler heads are available. Sidewall sprinkler piping is placed in the interior walls to prevent exposure to cold attics, and eliminating the concern for freezing.

Residential sprinkler systems use plastic and copper piping similar to that used for domestic water systems. If the heat in a house drops to a level where the sprinkler system will freeze, it is likely that the domestic system will also freeze. There is no unique danger of freezing with sprinkler systems that does not already exist with domestic water systems.