Head-to-head · Best Under-Sink Water Filters

Aquasana Claryum AQ-5300+ vs Filtrete 3US-PS01

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Aquasana Claryum AQ-5300+ comes out ahead by a narrow margin (4.6 vs 4.3). The gap is mostly about Households that want broad, certified contaminant reduction and great taste from a no-wait under-sink filter, while keeping healthy minerals. — read the strengths below before deciding.

Higher ratedRanked #1 in Best Under-Sink Water Filters

Aquasana Claryum AQ-5300+

4.6

$191.24as of Jun 7

The Aquasana Claryum AQ-5300+ is the best all-around under-sink carbon filter, pairing NSF/ANSI 42, 53 and 401 certification with a fast-flow three-stage design that keeps healthy minerals in the water. It reduces 99% of 77 contaminants, including lead, chlorine, PFAS and pharmaceuticals, without the water waste of reverse osmosis. The trade-off is a 6-month filter life and a higher per-gallon cost, but for clean, great-tasting water it's the top pick.

Strengths

— Triple-stage Claryum filtration reduces 99% of 77 contaminants including lead, chlorine, PFAS and pharmaceuticals
— NSF/ANSI 42, 53 and 401 certified, covering taste, health contaminants and emerging compounds
— Retains beneficial minerals like calcium and magnesium rather than stripping them

Watch-outs

— Filters last about 6 months or 800 gallons, shorter than some rivals
— Per-gallon filter cost is higher than basic single-cartridge systems
— Requires a spare faucet hole or drilling for the dedicated faucet

$191.24 · Check Price on Amazon Full review →

Ranked #5 in Best Under-Sink Water Filters

Filtrete 3US-PS01

4.3

$90

The Filtrete 3US-PS01 is 3M's straightforward under-sink filter, NSF/ANSI 42 and 53 certified to reduce chlorine taste and odor and parasitic cysts like Giardia and Cryptosporidium. Its signature Sanitary Quick Change cartridge installs with a quarter turn and no spills, and it uses your existing faucet at a strong 1.5 to 2.0 GPM. Filter life is a modest 2,000 gallons, and breadth is limited, but it's a reliable, widely available essential filter from a trusted brand.

Strengths

— NSF/ANSI 42 and 53 certified to reduce chlorine taste/odor and parasitic cysts
— Uses your existing faucet, no separate faucet or drilling required
— Sanitary Quick Change cartridge installs with a simple quarter turn, no spills

Watch-outs

— 2,000-gallon / 6-month filter life is shorter than the Waterdrop 15UA
— Single-cartridge system has limited contaminant breadth
— Initial line installation can be tricky for non-handy users

$90 · Check Price on Amazon Full review →

How they stack up

Aquasana Claryum AQ-5300+

More certified contaminant coverage than the Waterdrop 15UA and Filtrete 3US-PS01, and faster flow than the Frizzlife MP99. Unlike the Clearly Filtered 3-Stage, the AQ-5300+ carries multiple NSF certifications rather than relying on third-party testing alone.

Filtrete 3US-PS01

Similar essential-reduction scope to the Waterdrop 15UA and Frizzlife MP99 but with a shorter 2,000-gallon filter life than the Waterdrop. Less contaminant breadth and fewer certifications than the three-stage Aquasana Claryum AQ-5300+ and Clearly Filtered 3-Stage, but from the trusted 3M brand.

Specs side-by-side

Spec	Aquasana Claryum AQ-5300+	Filtrete 3US-PS01
Filtration	3-stage Claryum	Single-stage, 0.5 micron
Certifications	NSF/ANSI 42, 53, 401	NSF/ANSI 42, 53
Contaminants Reduced	99% of 77 (lead, chlorine, PFAS, pharmaceuticals)	Chlorine taste/odor, parasitic cysts, sediment
Filter Life	6 months / 800 gallons	2,000 gallons / 6 months
Mineral Retention	Yes (calcium, magnesium)	—
Faucet	Dedicated brushed nickel included	Uses existing faucet
Install Time	~30-45 min DIY	—
Flow	Max Flow (no tank)	—
Flow Rate	—	1.5-2.0 GPM
Maintenance	—	Sanitary Quick Change (quarter turn)
Brand	—	3M Filtrete

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