Berkshire Systems Group, Inc.
 - Sprinkler System Types -

Automatic Fire Sprinkler System Types

  • Wet Systems - these are the most common systems and are used in buildings where there is no risk of freezing. They are quick to react because water under pressure is always in the pipework.

  • Dry Systems - the pipework above the control valves are filled with air or inert gas under pressure at all times and below the control valves the pipework is charged with water. When a sprinkler head operates, the drop in pressure opens the valve and water flows into the pipework and through the activated sprinkler head onto the fire. Dry pipe systems are used where there is a risk of frost.

  • Pre-action Systems - like dry pipe systems the pipework is filled with air but water is only let into the pipework when a detector operates (e.g. smoke detectors). Pre-action systems are used where it is not acceptable to have the pipes full of water until there is a fire (e.g. computer suites).