The water extinguisher cools burning material. Very effective against fires in furniture, fabrics, etc. (including deep seated fires), but can be safely used only in the absence of electricity

Air-pressurized water (APW) cools burning material by absorbing heat from burning material. Effective on class A fires, it has the advantage of being inexpensive, harmless, and relatively easy to clean up. In the United States, APW units contain 2.5 US gal (9.5 l) of water in a tall, stainless steel cylinder. In Europe, they are typically mild steel, lined with polyethylene, painted red, containing 6–9 l (1.6–2.4 US gal) of water.

Water mist (WM) uses a fine misting nozzle to break up a stream of deionized water to the point of not conducting electricity back to the operator. Class A and C rated. It is used widely in hospitals for the reason that, unlike other clean-agent suppressants, it is harmless and non-contaminant. These extinguishers come in Template:Vonert units, painted white in the United States and red in Europe.
Water extinguishers are the most common fire extinguisher type for class A fire risk. Most premises will require either water or foam extinguishers.

The water extinguishers are used for Organic materials such as:Paper and cardboard; Fabrics and textiles;Wood and coal
The water extinguishers can`t be used for Fires involving electrical equipment; Kitchen fires ; Flammable gas and liquids