Blocking plug to block any unused filter holes in the upper chamber of all stainless steel Berkey systems.
Fits all stainless steel Berkey systems including the Go Berkey, Travel Berkey, Big Berkey, Royal Berkey, Imperial Berkey, Crown Berkey, and British Berkefeld models.
All stainless steel systems come standard with the proper amount of blocking plugs; in case of loss or damage, plugs may be purchased individually.
Blocking plug comes with wingnut and 2 washers.
Not recommended for the Berkey Light system.