Water Mist Fire Extinguishers

To use a water mist extinguisher, pull the pin, aim the nozzle at the base of the fire and squeeze the handle, sweeping side to side. For cooking oil fires, direct the mist above the flames rather than into the oil to avoid disturbing the burning surface. Always keep your back to the nearest exit.

Water mist extinguishers are suited to a wide range of settings, from homes, caravans and boats to schools, care homes and hospitality environments. Their residue-free, non-toxic discharge makes them particularly useful wherever chemical contamination is unacceptable: near food, around vulnerable people or in spaces with sensitive equipment or stock.

Water mist extinguishers are built around a supersonic nozzle that converts de-ionised water into ultra-fine droplets. These vaporise instantly on contact with heat, cooling the fire and displacing surrounding oxygen. This tackles two of the three elements of the fire triangle simultaneously. No chemicals are involved - the only agent is pure de-ionised water.

Water mist extinguishers are approved for Class A fires covering solid combustibles such as wood, paper and textiles, small Class F cooking oil fires and fires involving live electrical equipment. They are not suitable for Class B flammable liquid fires, Class C gas fires or Class D metal fires.

A water mist fire extinguisher is a water-based suppression device that converts pure de-ionised water into ultra-fine droplets through a specialist nozzle, giving it a broader range of approved fire classes than a standard water extinguisher and making it safe around food preparation areas and vulnerable people.

We usually recommend a water mist extinguisher for use at home as it can be used on all common fire types including small cooking fires, furniture, wood or paper fires and any fires involving electrical equipment. Another benefit of water mist extinguishers for the home is that they do not contain any nasty chemicals and so are not harmful to people, pets or the environment. They also leave very little residue to clean up as they only discharge tiny water droplets.

For properties with a deep fat fryer wet chemical fire extinguishers are also recommended.

The best extinguisher for barbecues is water mist which is totally non-toxic and fights all types of fires. It also creates a safe cloud of mist between the user and the fire and cannot harm children if used mischievously.

Water mist fire extinguishers are an ideal solution for type of BBQ, such as charcoal, gas and electric. They have been 35kV di-electrical tested and are safe for use on live electrical equipment up to 1000V at a distance of 1m, and they are not harmful to people, pets or the planet.

Traditional metal water mist fire extinguishers need to be serviced annually by a qualified engineer in the same way that foam, powder, and water extinguishers are. P50 Service-Free Water Mist Extinguishers do not require annual servicing by a technician.

Water mist extinguishers are real multi-purpose fire extinguishers capable of tackling the most common types of fire:

• Class A – solid combustibles
• Class B – flammable liquids
• Class C – flammable gases
• Class F – flammable oils (not recommended for use on anything above a 5F rated fire (this is equivalent to an average domestic deep fat fryer)
• Live electrical equipment up to 1000V

This includes waste bins, clothing, wooden furniture, soft furnishings, curtains and small gas appliances, making them ideal for a wide range of environments from homes to offices, workshops to churches, and even schools.

Yes, de-ionised water mist fire extinguishers have passed the di-electrical conductivity test, which marks them as safe for use on live electrical equipment up to 1000v in accordance with BS EN3-7. Two key factors differentiate water mist fire extinguishers from traditional water or foam units: 

• Water mist extinguishers are filled with de-ionised water, which cannot carry electrical current.
• The microscopic droplets that form the signature mist are too small and too far apart for electricity to flow through them.

No, water mist extinguishers are probably the most environmentally-friendly extinguishers on the market. Our water mist extinguishers contain only de-ionised water – there are no chemicals in the extinguishers. This makes the discharge environmentally friendly and any spill or residue can be easily cleaned up.

Traditional water extinguishers deliver a jet of water which penetrates the surface of the burning fat, sinks because it is heavier than fat, and almost instantly evaporates. This rapid expansion pushes the burning fat out of the pan or deep fat fryer, creating violent flares and spreading the fire. With a water mist extinguisher; most of the droplets evaporate above the fat creating a cooling ‘blanket’ reducing the oxygen from the surface and preventing re-ignition. That is why our water mist extinguishers are suited to fight small F-Class fires such as on shallow frying pans and domestic deep fat fryers (typically 2 to 3 litres). On larger fat and cooking oil fires, such as commercial deep fat fryers, there is a larger surface area burning and a much larger volume of oil to cool, which may still be disturbed by the instant evaporation of the water mist droplets; for this reason, we recommend a wet chemical extinguisher for fires above a 5F rating.

Water mist fire extinguishers contain only de-ionised water, meaning that no chemicals are released into the environment on discharge. This makes water mist extinguishers a sustainable and eco-friendly option, suitable for most common types of fire at home or in schools, offices, retail and other public buildings.

Water mist extinguishers are the most suitable choice for caravans because they're entirely safe for use in confined spaces, tackle Class ABCF fires, leave no residue, and are 100% safe to use on electrical fires up to 1000V.

Yes, water mist extinguishers are safe to use on live electrical equipment. These units have been tested up to 35,000 volts and contain only de-ionised water, which does not conduct electricity. This makes them incredibly versatile for modern environments where electrical hazards are common. Unlike traditional water extinguishers, the microscopic water droplets won't cause short circuits or electrical damage. However, always turn off electrical equipment when possible for maximum safety.

Water mist extinguishers operate differently in cooking oil fires compared to traditional water extinguishers. Traditional water extinguishers deliver a jet of water that penetrates the surface of the burning fat, sinks because it is heavier than fat, and almost instantly evaporates. This rapid expansion pushes the burning fat out of the pan or deep fat fryer, creating violent flames and spreading the fire. Water mist extinguishers create a cooling blanket above the oil, reducing oxygen and preventing re-ignition without disturbing the burning surface. They're perfect for small cooking fires, but larger commercial fryers still require wet chemical extinguishers.

Water mist extinguishers are exceptionally safe for clothing fires. The discharge of the water mist extinguisher is at low pressure and not harmful; the water itself is, of course, completely harmless. They extinguish clothing fires immediately and cool the affected area without causing harm to burns or the person. This makes them ideal for schools, nurseries, and other settings where vulnerable individuals are present. The fine mist won't cause the shock or injury that a high-pressure water jet might.

Water mist fire extinguishers contain only de-ionised water, meaning that no chemicals are released into the environment on discharge. This makes water mist extinguishers a sustainable and eco-friendly option. They leave no residue when discharged and contain no harmful substances. This is particularly important as AFFF foam extinguishers face international restrictions due to environmental concerns. You get effective fire suppression without compromising ecological responsibility.

The supersonic nozzle design of these extinguishers generates a mist curtain that diminishes the oxygen supply fuelling the fire, thus extinguishing the flames. Additionally, it forms a highly efficient cooling layer over the burning material, effectively preventing re-ignition. The microscopic water droplets create a much larger surface area than traditional water streams, allowing for faster heat absorption and more efficient fire suppression. This dual action of oxygen displacement and rapid cooling makes them incredibly effective against multiple fire types.

For specialized applications, read about how our water mist extinguishers have been used to protect Ukraine's historic buildings. For low-maintenance solutions, consider the P50 water mist service-free extinguisher that reduces ongoing maintenance costs.