Get replacement ZeroWater filters here! Make sure you have backup filters on hand to always have the purest-tasting water. We recommend that you change your 5-Stage filter once the TDS meter reads 006. Our premium water filters remove virtually all dissolved solids (aka TDS) – leaving nothing behind but pure-tasting water with each sip. The 5-stage Ion Exchange filter is NSF Certified to reduce PFOA/PFOS, Lead & Chromium. Get peace of mind knowing you have fewer contaminants in your home’s drinking water.