Replacement Water Filters: Undersink
Don’t settle for a replacement under sink water filter cartridge that simply fits, find one designed and manufactured specifically for your under sink water filter system.
Discount Filter Store has one of the largest selections of undersink filter cartridges. With under sink filter cartridges available in over 15+ different filter medias, 8+ different sizes (5x2½ - 20x4½), and a wide variety of filter life’s ranging from 250 gallons to 50,000+ gallons, you’re guaranteed to find the under sink water filter system and/or replacement cartridges you need. Choose from hundreds of under sink water filter cartridges from some of the industry’s top brands including American Plumber, Crystal Quest, Pentek®, Culligan®, GE, Aqua-Pure®, Whirlpool®, and more.
Sized 2 7/8 x 20 inches Learn More$133.99
Fits the Everpure water filtration systems that use QL-3 filter valve heads, including the H-300 Learn More$115.99 Retail Price: $123.04
Fits 3M Aqua-Pure undersink water filter systems Learn More$68.99 Retail Price: $70.14
Fits the 3M Aqua-Pure AP400 and AP400SS Point of Use water filtration systems Learn More$64.99 Retail Price: $71.29