Dry Sprinkler Inspection

A dry sprinkler system is pressurized with air or nitrogen, rather than having the pipes constantly filled with water. These systems often cover unheated spaces like freezers, attics, or an outdoor loading dock. The main control valve and riser are usually located in a heated space such as a maintenance room, or closet. The pressurized dry-pipe valve prevents water from entering the system until a fire activates one or more sprinkler heads. Once a sprinkler head breaks, the system loses air pressure and the dry valve activates. The clapper then opens, filling the system with water which makes its way to activated sprinkler heads to contain and/or suppress the fire until emergency services can arrive on scene.

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