Rely FX 2.5 Gal Synthetic Fluorine-Free Foam (SFFF) Fire Extinguisher

The Rely FX P2.5SFFF is the first UL Listed portable fluorine-free foam fire extinguisher that meets NFPA 10 standards. Manufactured by Rely Innovations (a subsidiary of National Presto Industries), it was developed specifically to address the growing regulatory and environmental pressure around traditional aqueous film-forming foam (AFFF) extinguishers, which relied on PFAS chemicals — including PFOS and PFOA — now linked to serious health and environmental risks and increasingly restricted by law. The P2.5SFFF fills that gap: it delivers the suppression performance of a foam extinguisher without a single fluorinated compound in its formulation.

The agent inside is NUFOAM, a premixed synthetic fluorine-free foam (SFFF) solution that suppresses Class A and Class B fires. On Class A combustibles like wood, paper, and textiles, NUFOAM penetrates and cools the fuel mass. On Class B flammable liquid fires, it forms a foam blanket over the surface, cutting off oxygen and preventing re-ignition. The premixed NUFOAM solution has a 5-year service life that aligns directly with the extinguisher's required hydrostatic testing interval, meaning agent replacement and cylinder re-certification happen on the same schedule — reducing service complexity and cost.

The cylinder is stainless steel, the valve is nickel-plated brass, the siphon tube is welded stainless steel, and the nozzle assembly is anodized aluminum. The unit has been tested to withstand 200G impact forces and extended vibration exposure, making it suitable for industrial, marine, military, and emergency response environments where standard extinguishers would fail. It carries UL, ULC, USCG, DOD, and NFPA compliance — the full range of certifications required across the industrial and defense sectors where foam has historically been the only viable agent for mixed-hazard environments.

Traditional AFFF foam extinguishers were effective, but they used PFAS surfactants — per- and polyfluoroalkyl substances — to create the aqueous film that suppressed flammable liquid fires. PFOS and PFOA, two of the most common PFAS compounds in AFFF formulations, do not break down in the environment and have been linked to cancer, hormone disruption, and immune system damage. Regulatory agencies in the U.S., EU, and elsewhere have been restricting or banning PFAS use in firefighting foam, leaving facilities that require foam protection with shrinking options.

The P2.5SFFF replaces the fluorinated surfactants entirely with a synthetic fluorine-free chemistry that achieves comparable suppression performance on both Class A and Class B fires. For facilities that have been waiting for a UL Listed, PFAS-free foam alternative before transitioning away from AFFF, this is that product. Operational methods are nearly identical to legacy foam extinguishers, requiring only minor technique adjustments — no retraining of entire workforces, no changes to mounting hardware, and no new inspection protocols beyond what NFPA 10 already requires.

The P2.5SFFF is designed for environments where flammable liquid fire risk is present alongside ordinary combustibles, and where PFAS-free compliance is a legal or organizational requirement:

• Industrial Facilities: Manufacturing operations, fuel storage areas, and process plants where Class B liquid fire risk is present and environmental compliance is mandatory.
• Marine Vessels: USCG approved and built to withstand the vibration, salt air, and impact forces of marine environments. A direct replacement for legacy AFFF units on commercial and government vessels.
• Military and Defense: DOD compliance and 200G impact testing make it suitable for combat vehicles, aircraft ground support, and field operations.
• Emergency Response: Fire departments and industrial response teams transitioning away from AFFF as PFAS regulations tighten.
• Aviation Ground Support: Fueling operations and hangar environments where flammable liquid fires are the primary hazard.
• Environmental Compliance Programs: Any facility under a PFAS reduction mandate or proactively eliminating fluorinated compounds from their safety equipment inventory.

The P2.5SFFF follows standard NFPA 10 maintenance requirements, with one key simplification: the NUFOAM agent's 5-year service life aligns with the cylinder's hydrostatic test interval. This means both the agent replacement and the cylinder pressure test fall on the same schedule, eliminating the staggered service visits common with other agent types.

• Monthly Visual Inspection: Verify the pressure gauge is in the green zone, the safety pin and tamper seal are intact, and the nozzle is free of obstructions.
• Annual Professional Service: A certified technician must inspect the cylinder exterior, valve, hose and nozzle assembly, labels, and mounting bracket. Verify agent condition and document in the inspection record.
• 5-Year Agent Replacement and Hydrostatic Test: At the 5-year mark, replace the NUFOAM agent charge and perform hydrostatic cylinder testing per NFPA 10. Both services are performed on the same cycle, reducing scheduling complexity.
• Post-Discharge Service: After any discharge, the unit must be returned to a certified service facility for refill with fresh NUFOAM agent before being returned to service. Do not refill with water or any other foam agent.

Can this replace my existing AFFF foam extinguisher directly?

Yes. The P2.5SFFF is designed as a direct operational replacement for legacy AFFF units. Mounting hardware, inspection protocols, and operational technique are essentially the same. Minor performance adjustments may apply depending on the specific hazard, but no major retraining or hardware changes are required.

Is this safe for Class B fires involving polar solvents like alcohols?

The P2.5SFFF is rated for Class B flammable liquid fires. For polar solvent-specific hazards such as alcohols and ketones, verify your specific application against the product data sheet, as alcohol-resistant performance characteristics vary between foam formulations. Contact your authorized Rely FX distributor for guidance on polar solvent applications.

Why does foam outperform dry chemical on flammable liquid fires?

Dry chemical ABC agents interrupt the chemical chain reaction of a fire quickly, but they do not form a lasting seal over a flammable liquid surface. Once the powder dissipates, the liquid surface remains hot and the fire can re-ignite. Foam physically covers the fuel surface, cuts off oxygen, and continues to suppress vapor release after discharge — making it significantly more effective at preventing re-ignition on liquid fuel spills.

What does PFAS-free mean for my facility's environmental compliance?

PFAS (per- and polyfluoroalkyl substances) are synthetic chemicals that persist in the environment and accumulate in living organisms. Facilities using AFFF-based extinguishers face growing regulatory liability as states and federal agencies restrict PFAS in firefighting foam. Switching to the P2.5SFFF eliminates that liability — the NUFOAM agent contains no PFOS, no PFOA, and no fluorinated compounds of any kind.