Aquasana Claryum 3-Stage (AQ-6300) review
By Daryna Klochko · Published · Specs checked Oct 13, 2026 · 
Scores 9.75/10, tied for 7th of the 32 under-sink filters we track. At $349.99 it costs 1.8 times the category median of $199.50. Its cartridge cost of about $168 a year is level with the $168-a-year median of the 32 under-sink filters with a stated cartridge cost. Its 90-day return window is 3 times the 30-day category median.
The widest listing: 7 substances in the WQA listing, tied for the most among the 32 under-sink filters
- Price
- $349.99
- Certified for
- Lead · Cysts · VOCs +4
- Flow
- 0.5 gpm
- Cartridge life
- 600 gal
- Cost per year
- $168
- Warranty
- 1 year limited
Certification
Listed by WQA under NSF/ANSI 42 · 53 · 401 for Chlorine, Chloramine, Lead, Cysts, VOCs, PFOA/PFOS, Microplastics, checked Oct 13, 2026. Search the WQA listings
- Chlorine
- Chloramine
- Lead
- Cysts
- VOCs
- PFOA/PFOS
- Microplastics
The contaminants or other substances removed or reduced by this water treatment device are not necessarily in your water. Listing checked on Oct 13, 2026. What a listing means and what it doesn't
Specs and sources
Checked Oct 13, 2026 · source under each valueFiltration
Cartridges and install
Buying
Warranty, returns and shipping
Warranty: 1 year limited. Returns: 90 days. Shipping: not stated by the brand. Source: Aquasana data sheet, checked Oct 13, 2026.
Source: Aquasana data sheet, checked Oct 13, 2026.
Compared with similar under-sink filters
All 32 under-sink filters →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| 3M Aqua-Pure 3MDW301-F Under Sink System with Faucet | $294 | Lead · Cysts +8 | $278 | 1 year | 9.25/10 | See specs → |
| Kohler Aquifer Double Cartridge (K-77686) | $300 | Lead · Cysts +5 | $300 | 5 years limited | 9.25/10 | Check price → |
| Aquasana Claryum 3-Stage (AQ-6300)THIS MODEL | $349.99 | Lead · Cysts +5 | $168 | 1 year limited | 9.75/10 | Check price → |
| Kohler Aquifer+ Two-Stage (K-29638) | $356.25 | Lead · Cysts +5 | $390 | 5 years limited | 9.25/10 | Check price → |
| Everpure EF-1500 Full Flow Drinking Water System | $367.93 | Lead · Cysts +2 | $139 | 1 year | 9.75/10 | See specs → |