Wet Sprinkler

DeOx: Mission-Critical NitrogenTM Corrosion Inhibiting Solutions for Wet Fire Protection Systems

South-Tek Systems’ DeOx product line offers a full suite of corrosion solutions for wet fire sprinkler systems. Oxygen found in sprinkler systems is the primary cause of pipe corrosion. Our DeOx products assist with displacing oxygen to inhibit corrosion and extend the life of wet fire protection systems. From our O2Release Systems, to the N2Inert System or Water Deoxygenation System, South-Tek Systems can provide right level of corrosion protection for any facility.

Dual-bed, PSA (Pressure Swing Adsorption) technology

Smart-Trak – Touchscreen control display; remote monitoring with mobile devices (select models)

Install N2Blast with new sprinkler systems or retrofit an existing system to extend system life

Manufactured in Wilmington, NC – generators are in-stock, ready to ship

Optional STS-NF-QF-2 air compressor available for quick-fill operation (635 gal. @ 40 PSI)

Extend the Life of a Fire Protection System

Using 98% nitrogen instead of compressed air supervision significantly increases the service life of a fire protection system.

A long-term exposure test found that when comparing compressed air supervision to 98% nitrogen the life expectancy of new systems using black steel pipe increases from 20 years to 63 years, while systems using galvanized steel pipe increases from 10 years to 176 years.

Dual Vent O2Release System

Helps to eliminate the corrosive air-water interface along the high points of the sprinkler pipe network

N2Inert System

Rapidly pre-fill wet sprinkler systems with ultra-pure nitrogen gas and effectively displace up to 99.5% of the oxygen from the system

Water Deoxygenation System

After employing N2Inert, the Deoxygenation System then removes the dissolved oxygen and harmful bacteria from the fill water prior to it entering the wet sprinkler piping

Issue of The Corrosion Triangle and how to prevent it

Corrosion is a result of three elements coming together; unprotected metal, oxygen and water. Removing the presence of one element, in this case oxygen, disrupts the equation and inhibits corrosion.

Unprotected metal

Results in a uniform wall-thinning corrosion mechanism in black steel and localized pitting corrosion mechanism in galvanized steel.

Oxygen electrochemical potential

There is an inexhaustible source of oxygen in compressed supervisory air.

Water electrolytes

Comes from residual water and moisture left behind after hydro test.

Oxygen has important role in corrosion occurrence

As a rule, air migrates through wet sprinkler piping to the highest points of the system, where it accumulates in pockets under compression due to the water pressure in the system. These “trapped air pockets” are comprised of 20.9% oxygen, which drives the corrosion of the interior pipe wall at the air-water interface.

Another contributor to the corrosion of wet sprinkler piping comes from the highly oxygenated water that fills the system. The dissolved oxygen in the fill water reacts with the steel to form a layer of corrosive black iron oxide (magnetite) along the submerged areas of the interior pipe wall. In addition, the dissolved oxygen can transfer out of the water and into the trapped air pockets, helping to sustain the corrosion reaction at the air-water interface.

Corrosion leads to the formation of localized pinholes and the resulting sprinkler pipe leaks, cause sprinkler head blockage, reduce flow rates, and render fire protection systems completely inoperable in the event of a fire – leading to loss of life and property.





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* 1,000 gal. per hour
* Reduces oxygen in both trapped air pockets, and fill water
* 16 GPM of deoxygenated water @ < 1.0ppm
* Fully pneumatic – no electrical required





* 3,000 gal. per hour
* Reduces oxygen in both trapped air pockets, and fill water
* 48 GPM of deoxygenated water @ < 1.0ppm
* Fully pneumatic – no electrical required



Dual Vent O2-Releas


* FailSafeTM design works as a true water stop
* Water accumulation fully drains back to FPS by depressurizing FPS and pressing
reset button on Air Release Valve
* Lightweight design
* Low height clearance
* Only one connection to the piping
* Primary Air Release Valve Failure Alarm with audible buzzer and visual LED
* Meets 2016 NFPA 13-7.1.5 vent requirement
* 9V Lithium ion battery with low battery buzzer and visual LED indicator



High Pressure Regulator Kit


* Connection point for nitrogen source
* For use with high pressure nitrogen cylinder or liquid nitrogen dewar
* Includes 10’ hose with quick connect nipple


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