Fire Extinguishers are an essential part of fire safety. The right fire safety equipment is essential for detecting and extinguishing fires, to reduce the risk of injury and protect your building from damage

TALK TO US TODAY 0208 712 5232

Fire Extinguisher Service and Maintenance

Reliable and effective fire safety equipment is critical to fire safety.

The right fire safety equipment is essential for extinguishing fires, to reduce the risk of injury and protect your building from damage. If you are unsure about the effectiveness of your extinguishers and signage or your fire alarm systems, get in touch with us today. Our experts have over ten years of experience protecting people and assets in the London area from the damage caused by fires.

We can design and install the very best fire alarm service without tying you into a service contract, so our service is more affordable and convenient for you. Once the alarm system is installed, we can also offer maintenance services to ensure that it is always working as it should.

When you buy your extinguishers we will ensure that you are meeting all safety standards and your safety is never compromised.

We work throughout the Greater London area, with commercial and residential clients of any sector and any industry. All of our solutions are designed to be suited to your environments, giving you the bespoke fire protection you can rely on in the event of an emergency. 

Whatever fire safety measures we recommend to you, we will ensure that it meets the UK regulatory code of practice for the design, installation, commissioning, and maintenance of fire safety equipment for your specific premises


Extinguishers in commercial or public buildings should be visually inspected monthly for damage or pressure loss and should be serviced to 5306-3: 2017 once a year. Water, foam and powder extinguishers have to be discharged and refilled every five years. CO2 extinguishers must be refurbished after ten years.

After an extinguisher has been used, even if only partially, it must be recharged.

No single extinguisher can be used to tackle every fire because each type of fire extinguisher has different classes of fire on which it is effective.

Six main types of fire extinguishers for what fires

  1. Water – Class A Fires
  2. Water Mist – Class A, B, C, F, Electrical Fires
  3. Foam – Class A, B, Electrical Fires
  4. Dry Powder – Class A, B, C Fires
  5. Carbon Dioxide (CO2) – Class B, Electrical Fires
  6. Wet Chemical – Class A, F Fires

Water Fire Extinguishers ( Signal Red )

Water extinguishers are only suitable for Class A fires consisting of paper, wood, straw, coal, rubber, solid plastics and soft furnishings. They are the simplest, most common, and least expensive type of extinguisher. Some have an additive to make the water more effective and reduce the required size and weight of the extinguisher.

Water extinguishers are the easiest to maintain variety and the least hazardous, since they only contain water. They cool the fire by soaking it and the materials with water. This extinguishes the flames, absorbing heat from burning objects.

They are often found in shops, offices, retail premises, schools, hotels, warehouses and domestic premises. They may have spray or jet nozzles and are usually able to put out a fire completely. A drawback is that they cannot be used on burning fat or oil (Class F), burning metals (Class D), burning liquids (Class B) or electrical appliance fires

⬇️ Water Mist Extinguishers ( Signal Red )

The newest type of extinguisher. These very powerful, but smaller, devices exude an ultra-fine mist of microscopic ‘dry’ demineralised water particles. They are safe and effective to use on Class A, B, C and F fires, making it unnecessary to supply more than one type of extinguisher in most premises. Some are also suitable for use on electrical fires on equipment up to 1,000 Volts, such as computers and printers.

They work by cooling the fire and reducing the oxygen supply. These devices are likely to replace wet chemical extinguishers for the extinction of deep fat fryer fires, and leave no residue or collateral damage. Like water extinguishers, they are recyclable and do not contain any chemicals. However, they cannot be used on Class D fires (metals).

⬇️ Foam Extinguishers ( AFFF - Cream Label )

The foam smothers the fire in solids and liquids (Class A and B), but not in burning fats or cooking oils (Class F). They can be used on some electrical fires if they have been tested and if fired from 1 metre away. However, they leave a residue that has to be cleaned up.

⬇️ Dry Powder Extinguishers ( Blue Label )

These are suitable for fighting burning solids, liquids and gases (Class A, B and C fires). Specialist powder extinguishers are designed to tackle type D fires involving combustible metals such as lithium, magnesium, or aluminium.

They work by the powder forming a crust which smothers the fire and stops it from spreading.

Disadvantages are that the powder does not soak into materials and does not have an effective cooling effect on the fire, which can result in the fire reigniting. The powder is hazardous if inhaled, so they should be used in well-ventilated areas and are not suitable for offices and domestic premises. The powder damages soft furnishings, machinery, etc, and needs a lot of cleaning up after use. They cannot be used on chip pan fires (Class F).

⬇️ CO2 Extinguishers ( Black Label )

These contain only pressuriSed carbon dioxide gas and therefore leave no residue. They are suitable for use on fires involving burning liquids (Class B), and electrical fires, such as of large computer equipment, so are practical in offices. CO2 works by suffocating the fire and does not cause damage to the electrical items or cause the system to short circuit.

However, CO2 extinguishers get very cold during discharge, and those that are not fitted with double-lined, frost-free swivel horns may cause fingers to freeze to the horn during deployment. They can asphyxiate in confined spaces, and they are not suitable for deep fat fryers, as the strong jet from the extinguisher can carry the burning fat out of the fryer. Fires can quickly re-ignite once the CO2 has dissipated into the atmosphere, so they do not offer post-fire security.

⬇️ Wet Chemical Extinguishers ( Yellow Label )

These are the only extinguishers apart from water mist suitable for Class F fires (fats and cooking oils) and are mainly used in kitchens with deep fat fryers.

They can also be used on Class A. They consist of a pressurised solution of alkali salts in water, which, when operated, creates a fine mist, cooling the flames and preventing splashing.

Which fire extinguisher types to use on which Class Fire

  • Class A – water, water mist, foam, dry powder, wet chemical
  • Class B – water mist, foam, dry powder, CO2, some wet chemical
  • Class C – water mist, dry powder
  • Class D – specialist dry powder
  • Electrical fires – water mist, foam, CO2
  • Class F – water mist, wet chemical
How to use a fire extinguisher from london city fire R
Fire prevention and protection is an important part of health and safety management. Make sure you have a fire risk assessment in place for your business and carry out any actions needed.


Talk to us: We would love to hear from you, whether you need some advice on your fire safety requirements or existing equipment tested, serviced or replaced, business security or home automation our team are always on hand to help.

larger accreditation strip

London City Fire © 2020 | Web Design by Propagate Media
Address: Unit 2 Michael Manley Industrial Estate, Clyston Street, SW8 4TU, London.
Telephone Number: +44 (0)207 498 6666

London City Fire Shield 1 sml