Blocking plug for Berkey, ProOne and British Berkefeld water filters (rubber cork)

Blocking plug for Berkey, ProOne and British Berkefeld water filters features:

• Blocking plug to block unused filter openings in the upper chamber of all Berkey, ProOne and British Berkefeld water filters.
• Suitable for all Berkey water filters, ProOne water filters and British Berkefeld water filters, if necessary.
• All Berkey, ProOne and British Berkefeld water filters come standard with the appropriate amount of blocking plugs; in case of loss or damage, plugs can be bought separately. Even if it is chosen to filter with only 1 filter element, for example, this blocking plug is needed.
• Blocking plug is made of rubber.
• Blocking plug is supplied separately (i.e. each).