Fire Extinguisher Regulations

Fire extinguisher regulations in the United Kingdom are primarily governed by the Regulatory Reform (Fire Safety) Order 2005 (RRO). Rather than prescribing exact extinguisher types or quantities, the legislation places responsibility on the Responsible Person to ensure that appropriate fire-fighting equipment is provided based on risk.

Virtually all non-domestic premises fall under these regulations. Because the law is deliberately risk-based rather than prescriptive, understanding how extinguishers should be selected, installed, maintained, and reviewed is essential for compliance.

When correctly assessed and managed, fire extinguisher provision plays a vital role in controlling small fires, supporting safe evacuation, and limiting damage to property.

Current Fire Extinguisher Legislation in the UK

Fire extinguisher requirements for non-domestic premises in England and Wales are set out under the Regulatory Reform (Fire Safety) Order 2005. The Order requires that “appropriate fire-fighting equipment” is provided where there is a risk of fire.

The legislation does not specify exact extinguisher numbers, sizes, or types. Instead, these decisions must be determined by a suitable and sufficient fire risk assessment.

The Responsible Person (such as a business owner, employer, landlord, or managing agent) must:

• Carry out and regularly review a fire risk assessment
• Provide appropriate fire-fighting equipment
• Ensure staff know the location of extinguishers and receive suitable instruction
• Maintain extinguishers in efficient working order

Supporting guidance for extinguisher provision, installation, and maintenance is contained within British Standard BS 5306 (Parts 3 and 8).

Failure to provide suitable equipment or training may result in enforcement action by fire and rescue authorities and may also invalidate insurance cover.

Fire Risk Assessment and Extinguisher Provision

UK legislation does not mandate a fixed number of fire extinguishers. Instead, extinguisher provision must be based on the findings of the fire risk assessment, taking into account:

• The size and layout of the premises
• The level and type of fire risk
• The activities carried out
• The vulnerability of occupants

As a general guide only (not a legal requirement), BS 5306-8 suggests that one 13A-rated extinguisher may cover approximately 200 m² of floor space, with a minimum of two extinguishers per floor in most commercial premises.

Water or foam extinguishers are commonly used for Class A risks, while CO₂ extinguishers are typically provided where electrical equipment is present.

Automatic suppression systems or sprinklers may, subject to risk assessment, reduce the number or positioning of extinguishers required, but they do not usually remove the requirement altogether.

Fire extinguishers are intended for use on small, incipient fires where it is safe to do so and should not be relied upon as a primary fire-fighting measure.

Selecting Appropriate Fire Extinguisher Types

The type of extinguishers required depends on the specific fire risks identified within the premises.

Common additional extinguisher types include:

• CO₂ extinguishers – for electrical fire risks
• Wet chemical extinguishers – for commercial kitchens and cooking oils
• Dry powder extinguishers – typically for external or specialist gas risks

Dry powder extinguishers are generally not recommended for enclosed occupied spaces due to visibility and inhalation risks.

Location and Installation Requirements

Fire extinguishers should be:

• Clearly visible and easily accessible
• Located on escape routes and near exits
• Positioned close to specific fire hazards where appropriate

BS 5306 guidance recommends that occupants should not have to travel more than 30 metres to reach a suitable extinguisher on any floor.

Specialist extinguishers, such as wet chemical units, should be positioned close to the hazard they are intended to protect — for example, near deep-fat fryers in commercial kitchens.

Fire Extinguisher Installation and Fixing

Fire extinguishers should be:

• Mounted on wall brackets or placed on suitable stands
• Positioned so the carrying handle is typically around 1 metre from floor level
• Accompanied by clear identification signage

Proper fixing helps prevent extinguishers from being moved, obscured, or obstructed and ensures they can be quickly located in an emergency.

Fire Extinguisher Commissioning

Fire extinguisher commissioning confirms that extinguishers are correctly installed, safe to use, and compliant with relevant standards.

Commissioning checks typically include:

• Correct assembly
• Secure fittings
• Correct pressure or weight
• Undamaged components
• Clear labelling and identification

Extinguishers are not considered compliant until they have been commissioned by a competent person.

Fire Extinguisher Maintenance and Servicing

Under the RRO, fire extinguishers must be adequately maintained. In practice, this means:

• Annual servicing by a competent fire extinguisher technician
• Periodic extended servicing or replacement in line with BS 5306 recommendations

Annual servicing includes checks on condition, pressure, weight, seals, tamper indicators, and instructions.

Maintenance Records and Evidence of Compliance

To demonstrate compliance, the Responsible Person should retain:

• In-date service labels on all extinguishers
• A service certificate from a competent provider
• Maintenance records kept on site
• Intact tamper seals or pin indicators

These records may be requested during fire authority inspections, insurance audits, or enforcement visits

Refilling and Replacement of Fire Extinguishers

Fire extinguisher refilling, testing, and replacement are governed by British Standard BS 5306 and depend on the extinguisher type, age, condition, and servicing history.

Replacement and Lifecycle Requirements

BS 5306 provides the following guidance on extended servicing and replacement intervals:

• Water, foam, and powder extinguishers: extended service or replacement at 5 years
• CO₂ extinguishers: test or replacement at 10 years

At these extended service intervals, extinguishers may be discharge tested, refilled, or replaced, depending on condition and manufacturer guidance.

Refilling vs Replacement

In practice, many organisations now choose replacement rather than discharge testing or refilling, particularly at extended service points. This is often due to:

• Environmental considerations
• Cost-effectiveness
• Reduced disruption to building operations
• Availability of modern, compliant units

Refilling, discharge testing, replacement, and disposal must always be carried out by a competent person and in accordance with BS 5306 and relevant environmental guidance.

The most appropriate option should be determined during routine servicing or extended maintenance, rather than assumed in advance.

Sourcing Fire Extinguishers

Fire extinguishers should be sourced from reputable fire protection providers supplying equipment compliant with current British Standards.

• Extinguishers should be supplied with:
• Appropriate identification signage
• Correct fixings
• Commissioning and servicing by a competent person

Purchasing extinguishers without professional advice can result in incorrect extinguisher selection, inadequate coverage, or non-compliant installation. For this reason, extinguisher provision is often assessed and specified as part of a wider fire risk assessment.

Conclusion

Fire extinguisher regulations in the UK are risk-based, not prescriptive. Compliance depends on:

• Selecting suitable extinguishers
• Positioning them correctly
• Maintaining them properly
• Reviewing arrangements through regular fire risk assessments

If you are unsure whether your current provision is compliant, a professional fire risk assessment and extinguisher survey will ensure your premises meets legal requirements and best-practice guidance.