Modern identification
The red body and colour zone system
Current UK practice uses a signal-red extinguisher body, with a small colour area where used to indicate the extinguishing medium. Labels also state the agent, instructions and tested ratings.
| Common type | Identification colour | Typical broad use |
|---|---|---|
| Water | Red body; normally no contrasting band | Class A solid materials |
| Foam | Cream | Rated Class A and B applications |
| Dry powder | Blue | Product-dependent A, B and C applications; specialist powders differ |
| Carbon dioxide | Black | Certain Class B and energised electrical-equipment risks |
| Wet chemical | Yellow | Rated Class F cooking-oil risks |
| Water mist or specialist battery unit | Marking varies | Read the agent, rating and manufacturer instructions |
Legacy equipment
Older extinguishers may have fully coloured bodies
Older units made to previous standards may use a whole-body colour. Their presence does not establish current serviceability or correct selection. Mixing old and modern identification systems can also confuse users.
A competent service should review age, condition, markings, parts availability and compatibility with the present hazards. Obsolete equipment should be removed through an appropriate disposal route.
Colour is not a specification
Two extinguishers with the same band can perform differently
Capacity, fire rating, discharge pattern, temperature range, additives and product approvals can vary. Colour also says nothing about service history, pressure, tampering or damage.
Use a colour chart for recognition only. Use the FRA, product label and competent selection for provision.
Workplace check
Make identification part of training and inspection
People expected to use equipment need premises-specific instruction that prioritises escape. Routine visual checks should confirm each unit remains in position, unobstructed, clearly identified and apparently serviceable.
- Agent and rating remain legible
- Correct unit remains at the specified location
- Signage does not contradict the equipment
- Pin, seal, hose and pressure indication appear intact
- Changes in hazard have triggered a selection review