by Potter

The benefits of
Potter Nitrogen
now for
Wet Systems

Corrosive Oxygen in your Wet System

It doesn't seem possible that a new sprinkler system can produce holes in less than two years. The corrosive effects of oxygen trapped in your wet system could be more costly than you think.

Potter's AquaN2 Method

The Potter AquaN2 Kit is designed to quickly and effectively purge oxygenated air from a wet fire protection system and replace it with high purity nitrogen gas. Reducing the oxygen levels in wet fire protection systems is essential in protecting the system from the effects of oxygen related corrosion often found at the air water interface in the fire sprinkler piping.

How it works

Using the AquaN2 Kit, which includes the Nitrogen Injection Manifold (NIM) and the Quick X-Haust Manifold (QXM), in combination with a Potter Automatic Air Release (PAAR-B) or Potter Air Vent (PAV) and a nitrogen source, can easily remove up to 99.9% of oxygen from a wet system.

By removing as much air as possible, the fire sprinkler system will have increased performance, eliminating delayed activation or cyclic activation of vane type waterflow detectors.

See it in action

Click to play installation video.

Oxygen, water, and metal: A recipe for corrosion

Fire sprinkler systems have the three necessary components for corrosion: Oxygen, Water and Metal. This environment starts the corrosion process and creates the rust often found inside the piping array. Over time the metal pipes will degrade, deteriorate, and eventually fail if corrosion mitigation efforts are not followed.

Where does the oxygen come from?

A common misconception of a wet fire sprinkler system is that the piping array is completely full of water. Yet research shows fire sprinkler systems can actually be up to 70% trapped air.

By not properly eliminating the trapped air in a wet fire sprinkler system an environment for accelerated corrosion occurs, and fire sprinkler system life expectancies decrease.

What about dissolved oxygen?

The amount of oxygen in water is around 10 parts per million, or .001%.

The amount of oxygen in trapped air is 210,000 parts per million, or 21%.

Removing the dissolved oxygen from water is negligible when compared to the amount of oxygen in the trapped air pockets. Focusing on removing the trapped air and replacing it with Nitrogen is the number one priority and the most cost effective method.

Nitrogen for Wet Systems

Nitrogen is an inert gas, meaning it does not react with the metal in a fire sprinkler system. In even the presence of water, no oxidation or rust will occur. Using Nitrogen for corrosion control is a well established practice for dry and pre-action systems. Taking the same concept of purging out the oxygen and replacing it with nitrogen and applying it to wet systems leads to similarly great results.

Research conducted showed on average, systems with 99% nitrogen pockets as opposed to air pockets increases the life expectancy of a wet fire sprinkler system up to


Wet System Inerting Testing

Average Corrosion Rates of Coupons Comparing Air to 99% Nitrogen (MPY)


Air 99% Nitrogen

Potter's AquaN2 System

The AquaN2 kit includes a Nitrogen Injection Manifold and a Quick X-Haust Manifold.

  • Quickly removes oxygen from wet pipe systems, significantly reducing corrosion
  • Ensures that all trapped gas pockets are 98%+ Nitrogen Gas
  • Easy installation and maintenance
  • Designed for fast Nitrogen fill, eliminating any necessary downtime of fire sprinkler system

Nitrogen Injection Manifold

Quick X-Haust Manifold

Air Vents


  • Provides automatic venting of trapped air in fire sprinkler systems
  • Includes automatic shutoff and collection pan
  • Automatic shutoff valve includes dry contacts for monitoring
  • Limits oxygen corrosion when placed at the high point(s) of the systems
  • UL listed and FM approved for fire sprinkler systems
  • Patented



  • Provides automatic venting of trapped air in fire sprinkler systems
  • Limits oxygen corrosion when placed at the high point(s) of the systems
  • UL listed and FM approved for fire sprinkler systems
  • Complies to NFPA 13, 2010, A8.
  • Patented


Additional Product


Auto-Test Flowswitch

  • Performs functional test without discharging water
  • Reduces corrosion by eliminating the introduction of fresh water and air
  • Conserves water and eliminates environmental concerns from sprinkler system discharge


Portable Nitrogen Analyzer

  • Displays exact nitrogen purity levels
  • Portable unit allows for end of line purity check

Pressure Regulator

With Hose

  • Easily connects a Nitrogen Cylinder to the AquaN2 Kit
  • Regulates pressure for the AquaN2 Kit to properly perform its duties.
  • Equipped with a quick disconnect coupler.

Get Started!

Take the next step by learning more about Potter AquaN2 and how nitrogen can prevent corrosion in wet systems.

Please contact us to schedule a free webinar training session.
Contact us

What to expect

The webinars will cover the basics of corrosion and give a brief description of how corrosion occurs as well as the types of corrosion often seen in fire sprinkler systems. They will focus specifically on designing and engineering wet sprinkler systems for enhance corrosion protection. We will talk in depth about using Nitrogen and AquaN2 to combat corrosion in fire sprinkler systems. Lastly, we will go over the economical impact of corrosion within the fire sprinkler industry and how you can lower your risk when dealing with corrosion issues.

Contact Us

Would you like more information on Potter's AquaN2 nitrogen solution for wet systems? Send us a message, we're here to help!