Refrigerator Water Filters can only remove so many contaminants before needing to be replaced. An overused filter lacks the ability to properly remove harmful substances still in the water. Water that passes through old, overused filters can even dislodge some of the trapped pollutants back into your drinking water. Not all refrigerators have an indicator light to tell you when the Refrigerator Water Filter needs to be changed, but all filters need to be changed regularly to work as expected. Watts Premier Refrigerator Water Filters are the best choice for your Refrigerator Water Filter.