Dry Pipe Nitrogen Inerting (DPNI) technology was developed by Engineered Corrosion Solutions, LLC (ECS) and is used to control oxygen corrosion in dry pipe and/or preaction fire sprinkler systems. DPNI is executed by employing a “fill and purge” differential pressure cycle (breathing) within the sprinkler pipe network. The “fill and purge” pressure cycle consists of venting the system pressure by 3-5 psi (.2-.3 bar), followed by replacing the vented pressure back into the system. This breathing process uses a nitrogen rich gas stream, typically 98% or greater, for a specific length of time (typically fourteen (14) days or less), until a nitrogen rich atmosphere exists within the sprinkler pipe network. By changing the atmosphere inside the pipe network to 98% or higher nitrogen content, the available oxygen content is reduced to a level that will not allow appreciable corrosion of the fire sprinkler pipe. With the level of oxygen corrosion reduced to near zero the effective life of the fire sprinkler system is greatly extended. Systems implement a DPNI corrosion control strategy should never develop leaks when maintained properly.