the present invention generally relates to the field of dry fire sprinkler systems , and more particularly , to a filtration device within the system to prevent vent corrosion . a chemical inhibitor or dessicant inhibitor is vaporized and circulated through a dry fire sprinkler system . the systems and methods of the present invention reduce or eliminate corrosion that typically affects conventional dry fire sprinkler systems , such as those caused by oxygen and microbiological systems , which can compromise the function of the fire protection system .