Whirlpool WHEERF 2-Pack Carbon Block Under Sink Replacement Filter in the Replacement Water Filters & Cartridges department at Lowes.com
Amazon.com: Whirlpool 8171434KS Genuine Charcoal Pre-Filter - Whishield Anti-Microbial Activated - Replacement Fit for Air Purifier AP51030K, AP45030K, APR45130L and WP500, Large - 4 Pack : Home & Kitchen
Amazon.com: Whirlpool Whispure Air Purifier WP500 (New Version of AP51030K) 490 sq ft Filtration with True HEPA and Carbon Pre-Filter 8171434K, 1183054K. Compact Odor Allergen Eliminator (WP500P-Pearl White) : Home & Kitchen
Amazon.com: Whirlpool WHEERF Replacement Water Filter Cartridges & iSpring T32M Pressurized Water Storage Tank with Ball Valve for Reverse Osmosis RO Systems, 4 Gallon, 1/4'' Tank Valve Included : Tools & Home
Filters Fast® Replacement for Whirlpool 8171434K Pre-Filter - 4-Pack
Activated Carbon Replacement for Whirlpool 817500 Pre-Filter | Filter -Monster