PD 4.25 Litre AFFF Fire Extinguisher System (Mechanical or Electrical)

The 4.25 Litre AFFF Fire Extinguisher System is an FIA homologated motorsport fire suppression system, designed for race, rally and competition vehicles requiring certified safety, reliability and long-term performance.

FIA homologated to EX056-19 and compliant with Motorsport UK regulations, this system uses AFFF foam (Aqueous Film Forming Foam) to deliver fast and effective suppression of fuel and electrical fires in motorsport environments.

This system is available in both mechanical and electrical activation options, allowing installation flexibility depending on vehicle setup and competition requirements.

Mechanical vs Electrical Options

Mechanical Activation System

• Manual pull cable activation
• Simple, proven motorsport standard
• Ideal for traditional race and rally installations
• Lightweight and robust operation
• Cylinder weight: 6.21 kg

Electrical Activation System

• Electronic trigger activation
• Suitable for modern race car electrical systems
• Clean installation with dashboard or switch panel control
• Cylinder weight: 6.04 kg

Both systems share the same FIA-approved suppression performance and 16-year service life cycle.

Long-Term Cost of Ownership (Key Benefit)

One of the key advantages of this system is its extended 16-year service life, which significantly reduces long-term ownership cost compared to traditional steel extinguishers.

Typical entry-level system (~£225) with a 10-year life cycle = approx. £22.50 per year
This system with a 16-year life cycle = approx. £14.06 per year

This delivers a lower annual cost of ownership, despite the higher specification, FIA approval and improved construction quality.

In addition to lifecycle savings, all motorsport fire extinguishers require regular servicing every 2 years. The PD system benefits from lower servicing costs, typically around 50% less than many comparable systems, resulting in additional long-term savings of approximately £280 over the service life.

When combined, this equates to a total potential saving of around £350 over the full life of the extinguisher, depending on usage and service provider pricing.

Alongside the cost benefits, the system also offers a significant weight reduction compared to traditional steel alternatives, helping improve overall vehicle performance, balance and handling in competition conditions.

Why Choose This System?

This extinguisher system is engineered for performance, compliance and long-term cost efficiency:

• 16-year service life cycle reduces replacement frequency
• FIA homologated for competition use
• Motorsport UK compliant
• Lightweight construction for improved vehicle performance
• Suitable for both mechanical and electrical installations

Compared to traditional steel systems, the extended service life significantly reduces long-term cost of ownership while maintaining full FIA compliance.

FIA Motorsport Safety Compliance

• FIA Homologated: EX056-19
• Motorsport UK Compliant
• Approved for race, rally and circuit competition use
• Suitable for professional motorsport safety requirements

Performance & Construction Benefits

• 4.25 litre AFFF foam capacity
• Rapid suppression of fuel and electrical fires
• Choice of mechanical or electrical activation
• Lightweight motorsport-specific design
• Corrosion-resistant construction
• Built for vibration and competition environments

Motorsport Applications

Suitable for:

• Stage rally cars
• Circuit racing vehicles
• Track day builds
• Endurance motorsport
• FIA-compliant competition cars

Frequently Asked Questions

What is a 4.25L AFFF fire extinguisher system?

It is an FIA approved motorsport fire suppression system used to protect race and rally vehicles from fuel and electrical fires.

What is the difference between mechanical and electrical systems?

Mechanical systems use a manual pull cable, while electrical systems use an electronic activation switch or button.

Can I buy spares for these systems?

Yes. We have a full range of spares HERE.

Do you have extra nozzles available?

 Yes we do, you can find a full range of nozzles HERE.

Is this FIA approved?

Yes. It is FIA homologated to EX056-19 and Motorsport UK compliant.

What is the advantage of the 16-year life cycle?

It reduces long-term replacement frequency and lowers overall cost of ownership.

Can this be used in rally cars?

Yes. It is widely used in rally, race and circuit competition vehicles.

My extinguisher expiry says June. Does it expire at the beginning or end of the month?

Your extinguisher remains valid until the end of the stated month.

With Race Rally Supplies, your PD extinguisher is professionally serviced, compliant and ready for competition.

Stainless steel is heavier than mild steel, so how are PD systems lighter?

This is a common question. While stainless steel is typically heavier than mild steel, the design and strength of PD stainless steel cylinders allow them to be manufactured more efficiently, reducing overall system weight.

In many cases, PD systems can be up to 4kg lighter than equivalent mild steel systems. Because of the strength of the stainless steel cylinder design, there is no requirement for the heavy internal bladder commonly used in mild steel systems, helping reduce both weight and complexity.

This makes PD systems particularly attractive for motorsport applications where reducing vehicle weight is important.

Why is PD extinguisher servicing cheaper than some other brands?

There are a couple of reasons for this. The main factor is the stainless steel cylinder design, which removes the need for the internal bladder commonly found in mild steel cylinders.

Without the bladder, servicing requires fewer replacement materials and less labour time, helping reduce overall servicing costs while still maintaining FIA and Motorsport UK compliance.

The result is a professional, compliant servicing process that can often be completed at a lower cost than comparable systems.