Viking 22087 M/W Dry Sprinkler Insulating Boot Assembly addressable Explosion-proof pressure switch that provides

Explosion-proof pressure switch that provides an alarm response between 10 and 200 PSI

They do not plan to continue production of these

inserting the bold into the hole on the guard reinstalling it into the bell on the wall

and pipe sizes

Viking 22087 M/W Dry Sprinkler Insulating Boot Assembly addressable Explosion-proof pressure switch that providesViking 22087 M W Dry Sprinkler Insulating Boot Assembly Kit Kit Includes: Rubber foam seal covered with a two piece metal ring and four (4) screws. Outside Diameter: 6 1 8" Depth: 1" 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