The 3 kg cylinder is the standard CO₂ source for the CUBE and typically lasts 6 to 12 months of sparkling water, depending on use.
Connecting
Hand-tighten the cylinder into the pressure regulator inside the CUBE housing and slowly open the valve fully.
Swapping
Close the valve first, bleed off residual pressure, then unscrew the empty cylinder. Swap through the official Quooker CO₂ exchange programme.