Aquasana AQ-5300+
Aquasana
An under-sink carbon system with an active NSF/ANSI 53 listing for the health-hazard contaminants that matter most — lead, mercury, and cysts — without the waste water or mineral stripping of reverse osmosis. It layers 401 (PFAS, emerging contaminants) on top, so it is the most complete health filter here that still keeps your water tasting natural.
Our Review
NSF/ANSI 53 is the health standard, and the Aquasana AQ-5300+ is the pick that satisfies it without the trade-offs of reverse osmosis. Its Claryum media holds an active 53 listing for lead, mercury, and cysts, plus a 401 listing for PFAS — so the health claim is documented and broad. Crucially, it does this while leaving calcium and magnesium in the water, so you get certified lead reduction without the flat taste of demineralized RO water, and without sending several gallons to the drain per gallon produced. It will not touch dissolved solids or fluoride, and the filters are not the cheapest, but for a home that wants verified protection against lead and emerging contaminants in one carbon system, it is the strongest all-rounder on the page.
Pros
- +Active NSF/ANSI 53 listing for lead, mercury, and cysts
- +Adds NSF/ANSI 401 for PFAS and emerging contaminants
- +No waste water and keeps beneficial minerals
- +Fast flow rate suits a busy kitchen
Cons
- -Needs tools and ~45 minutes to plumb in
- -Higher annual filter cost than a basic cartridge
- -Does not reduce dissolved solids or fluoride
- -Filter life is shorter than an RO membrane
Specifications
Stages
3-stage
Flow Rate
0.5 GPM
Filter Life
6 months
Annual Filter Cost
$130/year
Warranty
2 years
Dimensions
12 x 4 x 12 inches