Kohler Aquifer Hand Shower Filter (K-30646) review
By Daryna Klochko · Published · Specs checked Oct 15, 2026 · 
Scores 9.25/10, tied for 4th of the 15 shower filters we track. At $82.50 it costs less than the category median of $97.50. No certifier listing was found for it. Its 5-year warranty is longer than the 1-year category median.
- Price
- $82.50
- Certified for
- Brand claims only
- Flow
- 4 gpm
- Cartridge life
- 8,000 gal
- Cost per year
- $64
- Warranty
- 5 years limited
Certification
No certifier listing found.
Kohler also claims Chlorine: 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 15, 2026. What a listing means and what it doesn't
Specs and sources
Checked Oct 15, 2026 · source under each valueFiltration
Cartridges and install
Buying
Warranty, returns and shipping
90 days from shipment (kohler.com, new and saleable).
Warranty: 5 years limited. Returns: 90 days from shipment (kohler.com, new and saleable). Shipping: not stated by the brand. Source: Kohler data sheet, checked Oct 15, 2026.
Source: Kohler data sheet, checked Oct 15, 2026.
Compared with similar shower filters
All 15 shower filters →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Brondell VivaSpring Filtered Shower Head FSH25 | $49.99 | Brand claims only | $34 | 1 year limited | 9.25/10 | Check price → |
| Kohler Aquifer Hand Shower Filter (K-30646)THIS MODEL | $82.50 | Brand claims only | $64 | 5 years limited | 9.25/10 | Check price → |
| Weddell Duo Shower Filter (WD-100) | $89.99 | Chlorine | $72 | Lifetime | 9.75/10 | Check price → |
| Kohler Aquifer Shower Filter (K-22321) | $97.50 | Chlorine | $75 | 1 year limited | 9.5/10 | Check price → |
| Aquasana Shower Filter (AQ-4100NSH) | $119.99 | Brand claims only | $126 | 1 year | 8.75/10 | Check price → |
What owners say
Checked Oct 15, 2026- kohler.com brand's own site 4.2/5 31 reviews
4.1/5 from 80 ratings on Amazon. In our score this is 1.75 of 2 points. How we score
- Filtration performance14 mentions10 positive4 negative
- Installation10 mentions9 positive1 negative
- Water quality8 mentions8 positive0 negative
- Appearance6 mentions6 positive0 negative
Store ratings change over time; the date shows when we checked.