Dry Sprinkler Insulating Boot Assembly is used with Viking plain barrel, adjustable standard, and recessed dry sprinklers to help seal the clearance space around the dry sprinkler barrel. When properly installed, this seal decreases the potential for leakage of air through the opening in the ceiling or wall and consequent formation of condensation around the sprinkler connection on the system piping. In freezer installations, condensation can lead to ice build-up, which could inhibit sprinkler operation or cause premature sprinkler operation.