Fire Extinguisher Servicing Requirements in the UK — Intervals, Standards and Records
A fire extinguisher that looks fine on the wall but has not been serviced is not a fire precaution — it is a decoration. Under UK fire-safety law, extinguishers are "fire-fighting equipment" and the responsible person has a specific, legally enforceable duty to keep them maintained. This guide explains exactly what that duty involves, the servicing intervals set out in the British Standard, who is allowed to carry out the work, and the records you must be able to produce.
The legal duty: Article 17 of the RRO 2005
The Regulatory Reform (Fire Safety) Order 2005 is the foundation. Article 17 requires the responsible person to ensure that fire-fighting equipment — which includes portable fire extinguishers — is maintained in an efficient state, in efficient working order and in good repair.
Crucially, Article 17 does not leave "maintained" to guesswork. The duty is met by maintaining equipment in accordance with the appropriate British Standard. For portable extinguishers that standard is BS 5306-3:2017 — Fire extinguishing installations and equipment on premises. Commissioning and maintenance of portable fire extinguishers.
So the legal requirement is not "get them checked sometimes." It is: maintain every extinguisher to BS 5306-3, by a competent person, on the standard's defined intervals, and keep the evidence.
What a fire risk assessment decides first
Before servicing is even discussed, the fire risk assessment determines whether extinguishers are needed at all, and if so their type, number and siting. Selection follows BS 5306-8 (the code of practice for the selection and positioning of portable fire extinguishers). A premises with mostly electrical risks needs CO2; one with flammable liquids needs foam; a general office needs water or foam with CO2 for electrical. Servicing cannot correct a building that was given the wrong extinguishers in the first place — which is why the assessment comes first.
Servicing intervals under BS 5306-3
BS 5306-3 defines a clear maintenance hierarchy. The responsible person should expect the following cycle:
Basic service — every 12 months
A basic service is required at least once every year and must be carried out by a competent person. It includes a visual and functional inspection: checking the body for corrosion or damage, confirming the correct pressure (gauge in the green), verifying the safety pin, hose and neck seal are intact, checking the weight where applicable, and replacing the tamper seal and service label with the date and technician details. After any use — even a partial discharge — the extinguisher must be refilled or replaced immediately; a used extinguisher is a failed precaution.
Extended service — every 5 years (most types)
For water, foam, powder and wet-chemical extinguishers, an extended service is required at five-year intervals. This goes beyond the visual check: the extinguisher is internally examined, discharged and pressure-tested (or subjected to the standard's required examination), then recharged. Extended service is a more invasive procedure and is what gives confidence that the unit will actually function in years five through ten.
CO2 extinguishers — 10-yearly overhaul
CO2 extinguishers cannot be pressure-tested in the same way as other types. Under BS 5306-3 they are subject to a 10-yearly extended service / overhaul rather than the five-yearly cycle, and many are replaced at or before the end of their rated lifespan. CO2 units are assessed by weight and visual/internal examination by a competent technician rather than a standard hydrostatic discharge test.
End of life
Extinguishers have a finite working life, commonly cited around 10 to 20 years depending on type and condition. A unit that has reached the end of its serviceable life, or that fails extended service, must be replaced — not simply relabelled.
| Extinguisher type | Basic service | Extended service | Notes | | --- | --- | --- | --- | | Water / foam / powder / wet chemical | Every 12 months | Every 5 years | Internal exam + recharge | | CO2 | Every 12 months | Every 10 years | Overhaul by competent technician; replace at end of life | | Any unit after use | Immediately | — | Refill or replace after any discharge |
Who is "competent" to service extinguishers?
BS 5306-3 requires servicing to be carried out by a competent person — someone with the training, experience and equipment to do the work to the standard. In practice this means a technician working for a company operating to the BAFE SP101 certification scheme, which is the recognised third-party certification for portable fire extinguisher servicing in the UK. Using a BAFE-registered provider gives the responsible person demonstrable evidence that the work meets the standard the law points to.
Records the responsible person must keep
Article 17 is enforceable, and enforcement starts with documentation. The responsible person should hold:
- A service label on every extinguisher showing the date of the last basic and extended service and the servicing company.
- A maintenance log recording each visit, what was done, and any units replaced or removed.
- Evidence that the servicing company is competent (e.g. BAFE SP101 registration).
If a fire and rescue authority inspector asks for proof that your extinguishers are maintained, the label and the log are what they will ask to see. A missing or out-of-date label is one of the most common findings at inspection.
Siting, signage and accessibility
Maintenance is only half the picture. BS 5306-8 requires extinguishers to be sited where they are visible, accessible and on escape routes near exits — not hidden in cupboards or behind furniture. Each extinguisher needs identification signage, and travel distances to the nearest unit are set by the risk assessment (typically shorter for higher-hazard premises). An extinguisher that is serviced but blocked, un-signposted or the wrong type for its location is still a control failure.
How extinguisher servicing fits the wider regime
Extinguishers are one maintenance duty among several under Article 17. The same responsible person must also maintain fire detection and alarm systems, emergency lighting and fire doors. Treating extinguisher servicing as an isolated annual chore, disconnected from the rest of the building's fire-safety maintenance, is a mistake — the fire risk assessment should drive a single, joined-up maintenance schedule.
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*This article is general guidance and not formal legal advice. HawkSwift Ltd provides NEBOSH-qualified fire risk assessments that determine the correct extinguisher provision for your premises and flag maintenance gaps. Book a fire risk assessment or download our free FRA checklist to review your precautions.*