Waterworld Proline QC RO Instruction Manual page 9

Filter Cartridges Replacement Steps:
Warning: Do not Turn or Flip-Over the RO
1. Cut off water supply to the RO
2. Open Faucet to drain all water inside the RO
3. Turn RO off
4. Remove the cartridges cap
5. Hold the cartridge handle and rotate 90°counterclockwise, then pull it out
6. Replace it with new cartridge and align the arrow label to"
7. Cover the cap after finishing replacement. (The cap is unable to cover when cartridges are not in right place.)
Note: Please reset cartridges after replacement (see page 6).
"and rotate 90°clockwise to "
7
".