A Complete Guide to Fire Extinguisher Testing for Fire Safety

In the UK, fire extinguishers must be installed, inspected and maintained in accordance with recognised British Standards and fire safety legislation. Regular servicing is essential to ensure extinguishers remain in good working order and are ready for use in an emergency.

The principal standards and guidance documents include:

• BS 5306-3 – Commissioning and maintenance of portable fire extinguishers.
• BS 5306-8 – Selection and positioning of portable fire extinguishers.
• BS 5306-9 – Commissioning and maintenance of P50 service-free fire extinguishers.
• The Regulatory Reform (Fire Safety) Order 2005 – Places a legal duty on the Responsible Person to provide and maintain appropriate fire-fighting equipment.
• Manufacturer's instructions and recommendations – Fire extinguishers should always be maintained in accordance with the manufacturer's guidance and by a competent person.

Routine inspections and annual servicing help ensure fire extinguishers remain compliant, effective and capable of protecting people and property in the event of a fire.

The inspection and maintenance of fire extinguishers is governed by British Standards and fire safety legislation. Portable fire extinguishers should be visually inspected on a regular basis and serviced at least annually by a competent person to ensure they remain in good working order and are ready for use in an emergency.

In addition to annual servicing, it is considered best practice for the Responsible Person or a nominated individual to carry out routine visual checks, typically on a monthly basis. These checks should confirm that extinguishers are in their designated locations, have not been damaged or discharged, and remain accessible and correctly identified.

In the UK, the principal standard for the commissioning and maintenance of portable fire extinguishers is BS 5306-3, which sets out the requirements for routine servicing, extended servicing and overhaul procedures. Compliance with these standards helps ensure that fire extinguishers remain effective, legally compliant and capable of protecting people and property in the event of a fire.

The Responsible Person has a duty to ensure that portable fire extinguishers are regularly inspected and maintained verifying that they remain in good working order and are ready for use in an emergency.

Maintenance should be carried out by a competent person annually, in accordance with the recommendations of BS 5306-3 and the manufacturer's instructions.

A competent person should deem a fire extinguisher unserviceable where:

• Its condition presents a safety risk
• It is unsafe to use
• Damage, loss of contents or loss of pressure may prevent it from operating correctly
• Operating instructions or safety information have become illegible
• It no longer complies with the relevant standards or manufacturer's requirements

Following each service visit, the competent person should provide a maintenance report detailing any defects identified and any remedial action required.

Where an extinguisher is found to be fit for continued service, it should be appropriately labelled and service records updated accordingly. Details of all inspections, servicing and maintenance activities should be recorded in the fire safety logbook or other suitable maintenance records.

Regular inspection and maintenance help ensure that fire extinguishers remain compliant, effective and ready for use when needed. For complete peace of mind, engage a competent fire protection provider to inspect and maintain your extinguishers in accordance with current British Standards and best practice guidance.

Regular inspection and maintenance are essential to ensure fire extinguishers remain safe, compliant and ready for use in an emergency.

As a minimum, portable fire extinguishers should:

• Be visually inspected regularly by the Responsible Person.
• Receive an annual service by a competent person in accordance with BS 5306-3.
• Undergo extended servicing or overhaul at the intervals specified by British Standards and the manufacturer's instructions.

Typical maintenance intervals are:

• Annual basic service: Every 12 months.
• Extended service: Every 5 years for most stored-pressure water, foam and powder extinguishers.
• Overhaul and hydraulic pressure test: Every 10 years for CO₂ extinguishers.
• Service-free extinguishers: Maintained in accordance with the manufacturer's instructions and BS 5306-9.

The expected service life of a portable fire extinguisher will vary depending on its type, condition and manufacturer recommendations. With appropriate maintenance, many extinguishers can remain in service for up to 20 years, although they should be replaced sooner if they become damaged, corroded or no longer meet the required standards.

All inspections, servicing and maintenance activities should be recorded in the fire safety logbook or other suitable maintenance records.

Use: water extinguishers are effective against Class A fires, which include fires involving organic materials such as wood, paper and fabric.

Verification: checking water extinguishers includes checking the water level and ensuring that the tank is not corroded or damaged. It is also important to check that the valve is operating correctly.

Use: powder extinguishers are versatile, effective against Class A, B, and C fires. They are ideal for fires involving flammable liquids, gases, and electrical equipment.

Checking: when checking powder extinguishers, it is important to ensure that the powder is not agglomerated, which can prevent effective dispersion. It is also crucial to check the pressure and tightness of the container.

Use: these extinguishers are used for Class B and electrical fires, as they leave no residue. They are particularly useful in IT environments and kitchens.

Checking:checking CO2 extinguishers involves checking the weight to ensure that the gas has not leaked. The seals and trigger mechanism should also be thoroughly examined.

Use: effective against Class A and B fires, foam extinguishers are excellent for fires involving flammable liquids.

Checking: for these extinguishers, check that the foam solution is at the correct concentration and that the appliance has no blockages that could prevent the foam from dispersing.

Use: used for Class B, C and sometimes A fires, these extinguishers are chosen for spaces where electronics are present as they do not damage electronic equipment.

Verification: as with CO2, verification involves ensuring that the contents have not diminished and that the extinguisher components are in good working order.

Warning regarding halogenated hydrocarbon extinguishers known as HALON: No verification is permitted. Portable Halon extinguishers were withdrawn from the market in 2003.

Checking fire extinguishers is crucial in ensuring their functionality and effectiveness in an emergency. This section details the verification process in three key stages: visual inspection, weight and pressure verification, and recharge date verification. Each step is vital to ensure that extinguishers meet the required safety standards.

Importance: the visual inspection is the first line of defence in the fire extinguisher verification process. It identifies obvious problems that could compromise the extinguisher's effectiveness in an emergency.

Steps: check that the extinguisher is easily accessible, clearly visible, and unobstructed by objects that could delay its rapid use in the event of a fire.

Physical integrity: examine the extinguisher for signs of physical damage such as dents, cracks, or punctures. Ensure that the handle, trigger and other mechanisms are intact and functional.
Look for any corrosion on the body of the extinguisher, or signs of damage particularly in metal areas, as this can affect the internal pressure and structure of the extinguisher.

Importance: this step ensures that the extinguisher contains the correct amount of extinguishing agent at the required pressure for optimum performance.

Weight: weigh the extinguisher to check that it contains the specified amount of extinguishing agent. A lower weight may indicate a leak or previous use.

Pressure: examine the pressure gauge to ensure the needle is in the green zone, indicating adequate operating pressure. If the pressure is too low or too high, the extinguisher needs to be recharged or repaired.

Importance: this check ensures that the extinguisher has not exceeded the expiry date of the extinguishing agent, which is crucial to its ability to fight a fire.

Last refill: check the date of the last refill on the extinguisher label. The standard recommends a refill after each use or as directed by the manufacturer.

Expiry date: also check the expiry date of the extinguishing agent. Extinguishers whose agent has expired must be recharged immediately to remain functional.

Training and raising awareness among staff on the correct use of fire extinguishers, as well as recognising when they may require inspection or maintenance, are essential elements of an effective fire safety strategy.

Providing employees with the knowledge and confidence to respond appropriately in the event of a fire can help protect people, minimise damage and support a safe evacuation.

At Scutum, we help organisations develop both the practical and theoretical skills needed to ensure staff can use fire extinguishers safely and understand their role in effective fire emergency management.

Every year, workplace fires result in significant harm to people, damage to property and disruption to business operations. Providing employees with appropriate fire extinguisher training can help reduce the risk of injury, minimise damage and improve the overall response to a fire emergency.

Preparedness
Equip employees with the knowledge and practical skills needed to respond quickly and appropriately in the early stages of a fire.

Confidence
Increase confidence in the safe use of fire extinguishers, helping to reduce panic, improve decision-making and minimise mistakes during an emergency.

Awareness
Help employees understand the different types of fire extinguisher, when they should be used and when evacuation is the safest course of action.

Safety Culture
Promote greater awareness of fire risks and encourage a proactive approach to fire safety throughout the organisation.

Types of extinguishers: teach the differences between water, powder, CO2, and other extinguishers, as well as the classes of fires they are designed to fight

Techniques of use: train staff on basic techniques, such as the P.A.S.S. (Pull, Aim, Squeeze, Sweep)

Practice: organise fire simulations for staff to practise using extinguishers in a controlled environment

Ensuring employees understand how to use fire extinguishers correctly, and can recognise when equipment may require inspection or maintenance, is an essential part of an effective fire safety strategy.

Providing staff with the knowledge and confidence to respond appropriately in the event of a fire can help protect people, minimise damage and support a safe and orderly evacuation.

At Scutum, we help organisations develop the practical skills and theoretical understanding needed to ensure employees can use fire extinguishers safely and appreciate their role in effective fire emergency management.

Regular planning: establish a continuous training schedule to ensure that all members of staff are trained and that new employees receive the necessary training as soon as they join.

Knowledge updates: include the latest developments in fire safety and extinguisher technology in the training programme.

Collaboration with professionals: calling on Scutum Incendie to conduct training ensures that the information is both accurate and compliant with current standards.