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. Chlorine is a common contaminant found in home water because city municipal centers use the chemical to disinfect water. It’s common to have leftover chlorine affect the smell and taste of your water. The WHA2BF5 Carbon Block Whole Home Water Filter knocks out the chlorine so you have pure, refreshing water.