Locate the Purifier Cartridge “lock tab” at bottom of Inner Press. Then pull out the “lock tab”and unscrew the cartridge (lefty loosey) until it separates from the Inner Press.
Firmly grasp Inner Press, then insert cartridge into bottom of Inner Press.
03 ROTATE AND LOCK
Rotate the cartridge (righty tighty) until you feel the 'lock tab' firmly click into the lock slot. Do not over tighten..
TASTE THE RIVER
The silicone One-Way Valve prevents liquid from reversing direction and flowing back into the filter Cartridge. Allowing the use of electrolytes, drink mixes, and other beverages with your Grayl UltraPress® Filter & Purifier Bottle.
Compatible with older UltraPress® Cartridge versions.