Aquasana Shower Filter (AQ-4100NSH) review
By Daryna Klochko · Published · Specs checked Oct 13, 2026 · 
Scores 8.75/10, tied for 10th of the 15 shower filters we track. At $119.99 it costs more than the category median of $97.50. Aquasana publishes its own test data, but we found no certifier listing for its reduction claims; none of the 15 shower filters has one. Its 90-day return window is 2 times the 45-day category median.
Running costs matter: about $126 a year in cartridges, 1.7 times the category median
- Price
- $119.99
- Certified for
- Brand claims only
- Flow
- 2.5 gpm (brand)
- Cartridge life
- 10,000 gal claimed
- Cost per year
- $126
- Warranty
- 1 year
Certification
Brand data only: Aquasana publishes its own test data; we found no certifier listing that covers reduction claims.
Aquasana also claims Chlorine, Chloramine: brand claims, not in a certifier listing.
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. 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 shower filters
All 15 shower filters →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Kohler Aquifer Shower Filter (K-22321) | $97.50 | Chlorine | $75 | 1 year limited | 9.5/10 | Check price → |
| Aquasana Shower Filter (AQ-4100NSH)THIS MODEL | $119.99 | Brand claims only | $126 | 1 year | 8.75/10 | Check price → |
| Hydroviv Filtered Showerhead | $129.99 | Brand claims only | $209 | 5 years | 8.5/10 | Check price → |
| Hydroviv In-Line Shower Filter 2.0 | $133.32 | Brand claims only | $209 | 5 years | 8.5/10 | Check price → |
| AquaTru Shower | $149 | Chlorine | $160 | 1 year | 9.25/10 | Check price → |
What owners say
Checked Oct 13, 20264.1/5 from 123 ratings on Amazon. In our score this is 1.75 of 2 points. How we score
- Quality7 mentions5 positive2 negative
- Installation5 mentions5 positive0 negative
Store ratings change over time; the date shows when we checked.