Fire Sprinkler System

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When installing a fire sprinkler system there are three general types, wet-pipe, dry-pipe, and pre-action. A wet-pipe system contains water under pressure at all times and utilized closed sprinkler heads. A dry-pipe system is used in areas where temperatures drop to less than 40 degrees Farenheit, contains no water in the above ground piping prior to system activation, and is charged with air under pressure. The pre-action system, similar to the dry-pipe, is charged with air under pressure.

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