In these systems, the pipe network between the sprinkler head and the dry alarm valve station is filled with compressed air. Only after a sprinkler head is triggered is the system filled with water, and beyond that, regularly as a maintenance measure. In particular, this sprinkler system, which is usually designed according to the VdS CEA 4001 standard, is fundamentally subject to a significantly increased risk of corrosion due to its specific operating conditions. This results in high maintenance effort combined with repair and downtime costs. Corrosion is caused by moisture in combination with the oxygen present in the air. Filling with nitrogen as a dry, low-oxygen inert gas significantly prevents corrosion inside the piping systems. Also, the leakage losses allowed by VdS CEA 4001 are additionally compensated for by nitrogen, with the FM guideline expressly providing for the use of an inert gas such as nitrogen as an alternative to air.