The C2-02 VIQUA whole house filter is ideal for most 20 x 4.5-inch filter housings including the VIQUA IHS12-D4 and IHS22-D4 water treatment systems Coconut Carbon Shell filter media reduces chlorine taste and odor in your water down to 10 microns to improve both the taste and quality of your drinking water The VIQUA C2-02 Whole House Carbon water filter helps remove chlorine taste as well as other common home contaminants. Trusted Brand: This is a genuine VIQUA replacement part. The VIQUA C2-02 is a replacement whole house 10 Micron carbon water filter for the VIQUA IHS12-D4, IHS22-D4, and IHS22-E4 Systems.