Foam fire extinguishers are one of the most versatile and effective tools for tackling a wide range of fires.
In the UK, they’re a common sight in workshops, garages, warehouses, and anywhere that stores or handles flammable liquids.
In this guide, we’ll explain what foam extinguishers are, how they work, where to use them, and the British Standards you need to follow to keep your premises safe and compliant.
What Are Foam Fire Extinguishers For?
Foam fire extinguishers are primarily designed for Class B fires, which involve flammable liquids like petrol, oil, solvents, and paints.
They’re also effective on Class A fires involving solids such as wood, paper, and fabrics.
The foam works by forming a blanket over the surface of burning liquids, cutting off the oxygen supply and cooling the fire at the same time.
This prevents re-ignition and makes them particularly effective for areas where flammable liquids are stored or used.
Where Should Foam Fire Extinguishers Be Used?
You’ll typically find foam extinguishers in:
- Garages and workshops
- Factories and warehouses storing flammable liquids
- Fuel stations
- Car parks and vehicle maintenance areas
- Mixed-use commercial spaces where both solid combustibles and flammable liquids are present
Foam extinguishers should not be used on live electrical fires unless they have been specifically tested and certified as safe for accidental contact with electrical equipment.
British Standards and Compliance
In the UK, foam fire extinguishers must comply with BS EN 3, which defines the design, colour coding (cream label), testing, and performance requirements.
Like all extinguishers, foam units must be installed and maintained according to BS 5306-3, which governs commissioning, servicing, and extended servicing.
Commissioning New Foam Fire Extinguishers
Commissioning is a legal requirement and involves an on-site check by a qualified technician.
During commissioning, the technician will:
- Check for signs of damage or defects
- Confirm weight, pressure, and expiry date
- Affix maintenance labels
- Ensure the extinguisher is installed in the correct location, with the right signage and mounting
Foam Fire Extinguisher Servicing Requirements
Foam extinguishers need annual servicing, including:
- Checking pressure gauge readings
- Inspecting hose, nozzle, and components
- Confirming internal pressure and weight
- Checking labels and instructions for legibility
Every five years, foam extinguishers require an extended service, which includes discharging, inspecting internally, and refilling or replacing the unit as needed.
Signage Requirements
As with all extinguishers, clear signage must be displayed indicating:
- The type of extinguisher
- The classes of fire it can be used on
- Restrictions on use
Proper signage helps ensure that in an emergency, anyone can quickly identify and use the correct extinguisher safely.
How ESI Can Help
At ESI, we supply, install, maintain, and service foam fire extinguishers across the UK. Our services include:
- Supply: High-quality, BS EN 3-compliant foam extinguishers suitable for a range of commercial and industrial environments
- Install: Expert commissioning and placement according to your fire risk assessment
- Maintain: Annual and extended servicing in line with BS 5306-3
- Decommission: Safe removal of outdated extinguishers
- Recycle: Environmentally responsible recycling and disposal of old units
Stay Safe and Compliant
Foam fire extinguishers are one of the most reliable and versatile tools in your fire safety arsenal.
Make sure you’re fully compliant and protected by working with professionals who understand the regulations and standards.
Contact ESI today to arrange a free site survey, or speak to one of our experts for advice on your fire safety needs.
