MakeABC Certified DA29-00020B Refrigerator Water Filter We are sure you will enjoy the benefits of our product, for concerns, you can contact us. it is recommended to replace the filter every 6 months or 300 gallons, whichever comes first. Remove over 99% of numerous potentially harmful contaminants, using a high grade carbon block. Leak-proof technology for perfect fit without water leaks Retains the beneficial minerals in water for better health Great value for money with the superior quality.