Berkey Genuine Priming Button To Suit Black Berkey Purification Elements And PF2/4 Fluoride Filters

Berkey Genuine Priming Button to suit Black Berkey Purification Elements and PF2 & PF4 Fluoride Filters For use with: Black Berkey Purification Filter Elements Berkey PF2 Fluoride Filter Elements Berkey PF4 Fluoride Filter Elements To remove air from Black Berkey Purification Elements during initial setup and during regular cleaning. Also used with PF2 & PF4 Fluoride filters to flush before initial use. Same as supplied with new systems and new filter elements. (XXPB)