Wet, Dry, Deluge & Preaction

There are 4 common types of sprinkler systems, Wet, Dry, Deluge & Pre-Action.

WET

Wet systems are the most common as they are the simplest of the 4 and usually require the least maintenance.

DRY

Dry systems designed for environments with freezing temperatures like walk-in refrigerators, loading docks, and warehouses. The piping does not contain any water, it is charged with air or nitrogen under pressure.

DELUGE

Deluge systems are designed for when large quantities of water are needed quickly to control a fast-developing fire.

PRE-ACTION

Pre-Action systems are hybrid dry/wet fire protection systems. They are similar to a deluge system except the sprinklers are closed. Specifically designed to protect water sensitive facilities such as libraries, data centres and museums, etc.