Huguenot Labs provides the only two UL-listed corrosion and bacterial inhibitors on the market.

FSS ProGuard 295UL and FSS ProGuard 295UL D3

The corrosion engineering experts at Huguenot Laboratories have over 150 years of combined industry experience in testing and mitigating microbial and generalized corrosion in fire protection systems (FPS).


Our nationwide network of NELAP certified Laboratories offer a wide variety of microbial, deposit, metallurgical, and water analysis.

Nitrogen treatment vs Huguenot inhibitor

Contrary to popular belief, nitrogen gas treatment does NOT control corrosion, kill bacteria, or reduce dissolved oxygen content.

Other companies claim to have an electronic device that is a corrosion monitoring system. Unfortunately, all this device does is alert you when your piping system has lost 30% due to corrosion.

By contrast, a corrosion management program supplied by Huguenot gives real time data in 90 day increments of corrosion rates per ASTM guidelines, with accuracy down to 0.01 Mils Per Year (MPY).

Huguenot Labs offers the industry’s only performance-based guarantee that assures corrosion rates are maintained at a maximum sustained rate of 2.0 Mils Per Year.

Our Proguard treatment reduced corrosion rates 68% below that of a Nitrogen treated fire sprinkler system.


50+ years in the water treatment and fire sprinkler industry

SOLE provider of UL certified products in the market

Environmental friendly products developed in-house

Huguenot Laboratories specializes in treating all aspects of fire sprinkler systems. We are a growth-oriented company whose mission is to provide a value-added service to the fire sprinkler industry. We provide our customers with a team of experts in the prevention of corrosion, water treatment programs, and the management of Microbiologically Influenced Corrosion (MIC).

How to stop Microbiologically influenced corrosion

Microbiologically Influenced Corrosion is easily controlled with the proper chemical treatment program. Get warrantied results today!

What is mic?

Generalized and MIC-related corrosion is common in the fire sprinkler systems in buildings, factories, and warehouses. MIC attacks all types of metals in a fire sprinkler system, with steel pipe being the most vulnerable.

The internal build-up of heavy corrosion can occur in isolated parts of a system or can be living and growing throughout the entire network of pipes and sprinkler heads.

Under-deposit corrosion is found in both new and old systems. It is well documented as the primary cause of pinhole leaks in fire sprinkler systems around the globe.

Warning signs of mic

Warning signs of MIC:

– Pinhole leaks in pipes.
– Blackwater with a foul, rotten egg odor.
– Reduced water pressure and flow in the system.
– During flow tests, rust or black water stains the concrete.

The first step to stopping corrosion is to conduct a thorough inspection of your fire sprinkler system. Once a mitigation result is determined, verify your performance results thru an ASTM corrosion monitoring program.

Still Not convinced? Try our free demo test kit!

Our products are incredibly effective and now, at no expense, you can see just how successfully they stop the damaging effects of corrosion and MIC (Microbiologically Influenced Corrosion). Click the button to fill out our form and receive your kit!