Deluge gun

Similarly, facilities with highly flammable material such as oil refineries may have permanently-installed deluge guns.

Most apparatus-mounted deluge guns can be directed by a single firefighter, compared to a standard fire hose which normally requires several.

The latter option enables a firefighter to set up the gun to apply water to a blaze, before leaving it in place to attend to other tasks.

A master stream should never be fired into an occupied building, as the force could knock down a supporting wall and crush victims.

Also, the steam from the high volume of water delivered could cause a blowout or displace oxygen from an enclosed area, creating a risk of asphyxiation.