Deluge System

Deluge systems are specialized fire suppression systems that use water to extinguish fires in buildings. They are designed to provide rapid fire suppression in areas that are at high risk for fire, such as chemical storage facilities and power plants. In this article, we will discuss the deluge system and its components, the benefits of using deluge systems, and the regulations governing their use in buildings.

What is a Deluge System?

A deluge system is a type of fire suppression system that uses open nozzles to discharge large quantities of water onto a fire. Unlike other fire suppression systems, which use individual sprinklers or nozzles, a deluge system delivers water to all of the nozzles at the same time, flooding the area with water. This type of system is used in high-hazard areas where a fire could quickly spread and cause significant damage or loss of life.

The Components of a Deluge System

A deluge system consists of several key components that work together to provide rapid fire suppression. These components include:

  1. Water supply: A reliable source of water is required to supply the deluge system. This may come from a public water supply, a water tank, or a dedicated fire water storage tank.
  2. Deluge valve: The deluge valve is a critical component of the system. It is a large, hydraulically operated valve that controls the flow of water to the system. The valve is opened by an electric or pneumatic signal from the fire alarm system, which sends water to all the nozzles in the system.
  3. Nozzles: Deluge systems use open nozzles that are connected to piping that distributes water throughout the protected area. The nozzles are activated by the deluge valve, which floods the area with water.
  4. Detection system: The detection system is used to detect the presence of a fire. This can include smoke detectors, heat detectors, or flame detectors.

Benefits of Deluge Systems

Deluge systems offer several benefits for buildings that require high-hazard fire suppression systems. These benefits include:

  1. Rapid fire suppression: Deluge systems provide rapid fire suppression by delivering a large volume of water to the protected area. This can help to quickly extinguish fires before they have a chance to spread.
  2. Wide area coverage: Because deluge systems use open nozzles, they can provide wide area coverage, which is especially important in large open areas or areas with high ceilings.
  3. High hazard protection: Deluge systems are designed for use in high-hazard areas where other fire suppression systems may not be effective.
  4. Effective on different types of fires: Deluge systems are effective on a wide range of fires, including Class A, B, and C fires.

Regulations Governing Deluge Systems

Deluge systems are regulated by various standards and codes, including the National Fire Protection Association (NFPA) 15, Standard for Water Spray Fixed Systems for Fire Protection, and NFPA 16, Standard for the Installation of Foam-Water Sprinkler and Foam-Water Spray Systems. These standards provide guidance on the design, installation, and maintenance of deluge systems.

In addition to these standards, local and national regulations also govern the use of deluge systems in buildings. In Abu Dhabi, deluge systems are regulated by the Abu Dhabi Civil Defence Authority. The authority requires that deluge systems be installed and maintained by licensed and certified fire protection companies, such as Louis Fire Safety.


Deluge systems are an important fire suppression system for buildings that require high-hazard protection. They offer rapid fire suppression, wide area coverage, and are effective on a range of different types of fires. However, they require careful design, installation, and maintenance to ensure they function properly in the event of a fire.

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