Blocking plugs will to block any unused filter holes in the upper chamber of all larger stainless steel Berkey systems including:

• Big Berkey
• Royal Berkey
• Imperial Berkey
• Crown Berkey
• 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

Not recommended for the Berkey Light system