This filter uses revolutionary technology to filter water and features an advanced carbon block that removes over 99% of potentially harmful contaminants from water. NSF/ANSI42 certified to reduce chlorine, taste and odor Replace your water filter every 6 months or every 300 gallons for optimal performance. Run 2-3 liters of water through the filter before use for optimal filtration. If you are not satisfied with our filter, please contact us immediately and we will come up with a suitable solution for you. We just want you to love it, that's our goal