The Whirlpool UltraEase dual stage replacement pre/post filter (WHEEDF) should be replaced every 6 months to keep the system working efficiently and to ensure the highest quality water is available for your family. This system is NSF certified and built in the USA. All Whirlpool under sink drinkin...

The Whirlpool Standard Capacity Carbon Whole Home Water Filters - 2-Pack (WHA2BF5) filters water throughout your entire home, protecting your appliances and creating safer, better tasting water. Install filter on the main incoming water line. Works on both well water and municipal water supplies.