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Automatic Fire Sprinkler Systems
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Although there are several system types, the three automatic fire sprinkler systems most frequently installed are listed below, with brief descriptions of each type.

Wet Systems | Dry Systems | Pre-Action Systems


Wet Systems


Wet pipe systems are the most requested of the systems installed. This system relies on automatic sprinklers that regulate the flow of water in the event of a fire. Heat activated sprinkler heads are attached to a piping system, which contains water and is connected to a water supply. Only the heads that are activated by the heat of the fire will release water, containing the discharge to the area affected by the fire.

New Millennium installs this system on most job sites.

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Dry Systems


Dry pipe systems are installed where piping is subject to freezing. Dry systems consist of automatic sprinklers attached to piping that contains pressurized air or nitrogen, in place of water. As the sprinkler head opens, triggered by the heat of the fire, it releases the pressurized agent. The rapid reduction of pressure within the pipes opens clappers, allowing the water to enter the piping and flow through heads activated by the fire.

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Pre-Action Systems


Pre-action systems provide protection and security from accidental water discharge. As with the other two systems, automatic sprinkler heads are attached to a piping system. However, pre-action systems normally require a separate detection device as well. This device regulates the deluge water control valve, opening it in the event of fire allowing water to flow to the heads activated by the fire's heat. An audible alarm also sounds prior to the discharge of water.

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