Saver plug: stopper for British Berkefeld and Oakland Well gravity water filters

Food grade plug for British Berkefeld and Oakland well water filters. Use this to close the gaps for filter elements you don’t want to use. With saver plugs you can choose to install only 1, 2 or 3 filter elements at a time. This means that your water filter will filter more slowly, but otherwise the filter performance will remain the same.