5 easy steps to install a new water filter [save this post!] It’s that time again: swapping your old filter for a new one. Follow these five steps to make it a breeze: 1. Read your TDS meter. Each ZeroWater device comes with a TDS meter or it’s built into your device. If the meter says your TDS score is 006 or above, it’s time to change your filter. 2. Remove your old filter. Just twist, remove, and set aside. 3. Install the new filter. Twist the filter into the bottom of the reservoir and tight