Nitrogen Generating Systems

The UNITED Fire Systems NITROGEN-PAC is a fully integrated nitrogen generating system to introduce high-purity nitrogen into preaction or dry sprinkler piping. NITROGEN-PAC replaces the existing air compressor, providing the necessary supervisory pressure in the form of nitrogen instead of air. NITROGEN-PAC occupies minimal space, operates quietly, and can be installed near your sprinkler system riser.

Read more about corrosion and corrosion prevention or give us a call at 908.688.0300.


  • For dry or preaction sprinkler systems
  • Dries interior of the pipe with nitrogen
  • Generates nitrogen from atmospheric air
  • Inhibits both oxidation corrosion (rust) and MIC
  • Cost-effective continuous supply of 98% purity nitrogen
  • No inconvenient handling of high-pressure cylinders
  • Low ongoing cost
  • Available as a self-contained (SC series) system for smaller applications
  • Available as a modular engineered (M series) system for larger applications
  • Automatic purging and nitrogen concentration display for any NITROGEN-PAC system



  • Lengthens the life of the pipe
  • Helps prevent pipe wall thinning, pinhole leaks, and rust that clogs sprinkler heads
  • Offers reliable, dependable protection that works
  • Comes with expert field and in-house technical support


The NITROGEN-PAC SC (Self-Contained) Series is a family of FM Approved nitrogen-based sprinkler corrosion inhibiting systems, providing high-purity dry nitrogen for the interior of preaction and dry sprinkler piping. These units feature a compressor for system fast-fill and nitrogen generation, refrigerated drying of the air for the lowest possible moisture content, and membrane technology for efficient nitrogen generation. The SC Series factory-assembled units save space and shorten installation and commissioning time.

Product Information


The NITROGEN-PAC M (Modular) Series from UNITED Fire Systems is a unique approach to supplying nitrogen for sprinkler systems. The modular concept allows for the choice of components perfectly sized for the application. Many small to mid-sized systems need an engineered system approach for both proper application and cost-effectiveness. The NITROGEN-PAC M Series permits our expert designers to choose the components that fit your application—with no compromise of protection or dollars.

Product Information


The UNITED Fire Systems True Advanced Purge System Model TAP-G3 is designed to automatically purge air from within a dry-pipe or preaction sprinkler system and replace the air with 98% nitrogen from a NITROGEN-PAC™ sprinkler corrosion inhibiting system. The system also automatically samples, analyzes, and displays the percentage of nitrogen within the pipe.

Product Information

Did You Know?
  • Your dry-pipe or preaction fire sprinkler system can be infected! That’s right – microbes can be lurking inside your sprinkler pipes and causing damage.  Microbiologically influenced corrosion (MIC) occurs when the right combination of moisture and microbial organisms produces rapid corrosion of steel piping from the inside out. MIC is not the only cause of steel pipe corrosion, but it is important to know about and mitigate this problem BEFORE it causes pitting, pinholes, and thinning of pipe walls. Take steps to prevent both rust and MIC by using NITROGEN-PAC.