Unlike an ordinary sprinkler system with single-trigger nozzles, this system has open nozzles. The system is mainly used externally, to ensure that the water hits the fire site, even in strong winds. This system moistens well around the fire site and thereby prevents rapid spread of the fire. This means that it must have its own trigger system, and that when it trips, it will spray water from all nozzles at the same time. See information about external facilities. If you want to secure a church outside with a deluge facility, it will usually be necessary to divide the facility into 2 to 6 sections. As mentioned, a deluge system must have open nozzles. In practice, ordinary sprinkler nozzles are used where the melt joint is removed. The spreader must be adapted to the desire for where you want the water. On an exterior wall, it is important to keep the water spread as close to the wall as possible, this is where it should moisten. If water splashes out of the wall, the wind will take it and it will do little good.

Water supply

All deluge systems require complete calculation of the amount of water as all the nozzles are triggered at the same time. In many cases, one will have to calculate that two plants next to each other are triggered at the same time, then the water supply must be able to cover both.

Sprinkler Central

A deluge valve keeps the water out of the system by a mechanically controlled valve. The valve opens via an electric or air-controlled alarm system.


  • Suitable for external use due to the fact that it releases an entire section at the same time and is thus less sensitive to wind.
  • Provides good humidification of the area around the fire.
  • Used to reinforce or replace a firewall.
  • Particularly suitable for roof surfaces to prevent ignition by spark rain and lightning. Disadvantage
  • Requires a lot of water.
  • Depends on a trigger system, which involves an additional possible source of error.

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