Aquasana AQ-5300R 3-Stage  Under Sink Water Filter Replacement Cartridges Replacement filters for the AQ-5300 3-Stage Water Filter System to be used with the following systems: AQ-5300.55, AQ-5300.56, and AQ-5300.62 Use only genuine Aquasana replacements with your Aquasana system - untested replacements are not certified for performance capacity or contaminant removal Replacements are an easy twist - no need to disconnect hoses or water lines. Simply twist off the filter housing, replace the filter, and twist back on. - no plumber necessary! Reduces up to 99% of 77 contaminants including lead, mercury, asbestos, pesticides, pharmaceuticals, and more Full system certified to NSF standards 42, 53, 401, and P473 - will not leach contaminants back into your water Ultra-Delicious  Claryum filtration retains beneficial minerals, like calcium and potassium, for great tasting water