Healthy Water - The filter is certified by NSF 42&53 to reduce most of the pollutants including waterborne parasites, lead, mercury and pesticides, leaving no odor or reducing nutrients in the water, providing clean and healthy for your family water. Filter replacement- In order to ensure the clean water and normal water flow of your refrigerator, it is recommended that you replace the filter every 6 months or 200 gallons. Tips -When using for the first time, rinse 4 to 5 gallons of water. Simple installation - No special tools are required, just insert the filter into the built-in groove in the correct direction. Friendly Customer Service - We are sure you\'ll enjoy the benefits of our product! We offer 30-day money back guarantee and friendly customer service