Each filter cartridge lasts around 6 to 8 months. When it is time to change, you will notice that the water flow is much slower than usual.
To change the cartridge -
1. Simply twist the cartridge clockwise and pull down to uninstall the used cartridge.
2. Replacing with new cartridge, align and insert cartridge to head assembly, then twist the cartridge counter clockwise to securely lock it.
Bear in mind that new cartridges need to go through their first round of water filtration and the water filtered needs to be discarded. Continue your usual water consumption with the water filtered from the second round onwards with the new cartridge.