Our 3M Aqua-Pure Under Sink Full Flow Replacement Water Filter Cartridge AP217 is for use with the space saving, compact AP200 under sink full flow water filter system which installs under the sink and is a good choice in water filtration delivering cleaner, clearer, better tasting drinking water. The AP200 system and AP217 replacement cartridge provide water filtration on demand for drinking (water, coffee, tea, baby formula, etc.) and for cooking. This AP217 under sink full flow replacement water filtration cartridge is NSF listed to reduce chlorine taste and odor. Our AP217 also reduces sediment*. The universal system and replacement cartridge design allows for use on both chlorinated (municipal) and non-chlorinated (well water) systems.