Aquasana Claryum 3-Stage Review 2026
The Aquasana Claryum 3-Stage Max Flow is one of the better non-RO under-sink filters available - listed by WQA under NSF/ANSI 42, 53 and 401, no storage tank, up to 15x faster flow than standard under-sink filters. Its listings cover PFOA/PFOS, lead, chlorine and pharmaceuticals, all without an RO membrane - meaning zero water waste and no electricity required. The key trade-off vs RO: it does not remove fluoride or arsenic, which require an RO membrane. For households on municipal water without fluoride concerns who want PFAS and lead reduction at a competitive running cost, the Claryum 3-Stage is a cleaner, simpler solution than a full RO system.
Get it if You want filtered water at the kitchen tap with no tank and no drain line.
Skip it if Fluoride or arsenic is your reason for filtering: this design does not address either.
- Certified for PFOA/PFOS, lead and pharmaceuticals
- No storage tank - instant flow
- Zero water waste - no RO membrane
- Carbon system: not a fluoride filter
- Does NOT remove arsenic or nitrates
- Requires drilling for dedicated faucet
- Filter replacement every 6 months
Before you buy: check that the Amazon listing title includes Claryum 3-Stage Max Flow. The maker gives a filter life of 6 months.
Check price on Amazon ↗ (paid link) Buy direct from Aquasana ↗ (paid link)NSF 401 - what it certifies and why it matters
Claryum 3-Stage vs RO - when to choose which
The Claryum 3-Stage is a carbon-based under-sink filter, not an RO system. This matters: carbon filters and RO membranes remove different contaminants through different mechanisms.
Carbon filters (Claryum): adsorb contaminants onto activated carbon surface - effective for chlorine, chloramines, VOCs, PFAS, lead, pharmaceuticals. Fast flow, no water waste, no electricity. Cannot remove fluoride, arsenic, nitrates, TDS, or heavy metals dissolved at the ionic level.
RO membranes (APEC, Waterdrop): physically size-exclude contaminants at 0.0001 micron - removes fluoride, arsenic, nitrates, TDS, and everything carbon removes too. Trade-offs: slower flow (tank system), water waste (2-4:1 drain ratio), electricity (tankless), or storage tank.
Claryum 3-Stage vs competitors - full comparison
| Model | PFAS | Fluoride | Pharma NSF 401 | Tank | Cost tier | Buy |
|---|---|---|---|---|---|---|
| Aquasana Claryum 3-Stage (this review) | Yes | No | Yes | No tank | Budget-mid | Check price on Amazon ↗ (paid link) |
| APEC ROES-50 | Not certified | Not certified | No | 3.2 gal tank | Budget | Check price on Amazon ↗ (paid link) |
| Waterdrop G3P600 | Yes | Yes | No | Tankless | Premium | Check price on Amazon ↗ (paid link) |
| Aquasana SmartFlow | Yes | Yes | Yes | Tank | Mid | Check price on Amazon ↗ (paid link) |
Choose Claryum 3-Stage if: you're on municipal water without fluoride concerns, want the simplest certified under-sink setup with no water waste, and value NSF 401 pharmaceutical coverage. Best for households that want clean, great-tasting water without the complexity of RO.
Choose APEC ROES-50 if: you want RO at the lowest running cost and don't mind the storage tank; note that its certification covers TDS only, not fluoride. Choose Waterdrop G3P600 if you want tankless RO with certified fluoride and PFOA/PFOS reduction. Choose Aquasana SmartFlow if you want RO, NSF/ANSI 401 and remineralization in one system.
Alternatives worth considering
FAQ
Does the Aquasana Claryum 3-Stage remove PFAS?
Does the Claryum 3-Stage remove fluoride?
What is NSF 401 and why does the Claryum have it?
Claryum 3-Stage vs Aquasana SmartFlow - which to choose?
How does the "fast flow" claim work?
Buying direct from the brand
Some of the makers on this page also sell the same systems on their own sites and run their own affiliate programs. We earn a commission from those links too, at no extra cost to you. Prices, bundles and warranty terms can differ from Amazon, so compare both before you buy.