Water fire extinguishers are one of the most popular extinguishers used to tackle fires. They’re effective on Class A fires, like wood, paper, and textiles. Simple to use and cost-effective, water extinguishers are ideal for most homes and offices.

In this blog, we’ll explore how water fire extinguishers work, when to use them, and why they’re a reliable option for tackling everyday fires. Click here for other fire extinguishers

What is a Water Fire Extinguisher?

A water fire extinguisher uses water to put out Class A fires, such as those involving wood, paper, and textiles. It works by cooling the fire and reducing the heat.

How Does a Water Fire Extinguisher Work?

A water fire extinguisher works by cooling the fire. The water is sprayed onto the flames, lowering the temperature and stopping the fire from spreading. It removes heat from the fuel, making it harder for the fire to continue.

• Lower the temperature

• Remove the heat from the fuel

• Prevent the spread of the fire

This method is effective for Class A fires but should never be used on electrical or flammable liquid fires.

What Is A Water Fire Extinguisher Used For?

A water fire extinguisher is used for Class A fires. These include fires caused by wood, paper, and textiles.

When To NOT Use A Water Fire Extinguisher

Never use a water fire extinguisher on electrical fires. Water can conduct electricity, increasing the risk of shock.

Don’t use a water fire extinguisher on:

• Class B flammable liquid fires like oil or petrol, it will spread the fire

• Class C gaseous fires

• Class F cooking oils. Water will splash the cooking oil around the kitchen potentially causing the fire to spread

• Class D metal fires. Water can react with some metals, making the fire worse

• Electrical fires, electricity is a major cause of accidental fires in UK homes, over 20,000 each year (source)

According to the Home Office's fire statistics data tables, electrical distribution and appliances are common sources of accidental dwelling fires.

How To Identify A Water Fire Extinguisher

A water fire extinguisher is red with a red label. The label will show clear WATER text per BS EN 3.

You’ll find clear instructions on the label, along with a pressure gauge to check its readiness.

What Is A Water Additive Fire Extinguisher?

A water-additive fire extinguisher contains water mixed with additives to improve performance. The additives make the water more effective at cooling the fire. They can also help prevent re-ignition.

• These extinguishers are used for Class A fires

• Are more efficient than regular water extinguishers

• Ideal for environments where fires can quickly spread

What Is A Water Mist Fire Extinguisher?

A water mist fire extinguisher uses a fine mist of water to put out fires and is effective on Class A, Class F, and electrical fires.

Water mist extinguishers are safe for delicate equipment, cooking oil fires and enclosed spaces. They are more versatile than regular water extinguishers.

The Pros and Cons of a Water Fire Extinguisher

Pros of a water extinguisher:

• Effective on Class A fires, like wood and paper.

• Easy to use and affordable.

• Ideal for homes and offices.

• Non-toxic and safe for general use.

Cons of a water extinguisher:

• Not suitable for electrical fires.

• Can spread flammable liquids like oil.

• Damages electronics and valuable items.

• Limited to Class A fires only.

Upholstered Furniture Fires

In the fiscal year 2021 to 2022, the Home Office released statistics focusing on primary fires involving upholstered furniture.

• "Of the total 176 victims of fires with an item first ignited of "Furniture/Furnishings - Upholstered furniture', there were 22 fire-related fatalities and 154 non-fatal casualties." (source).