Brondell Coral UC300 Three-Stage Under Sink review
By Daryna Klochko · Published · Specs checked Oct 15, 2026 · 
Scores 10/10, tied for 1st of the 32 under-sink filters we track. At $179.99 it costs less than the category median of $199.50. Its cartridge cost of about $80 a year is less than half the $168-a-year median of the 32 under-sink filters with a stated cartridge cost. Buyers on Amazon rate it 4.3/5 across 692 ratings.
The widest listing: 7 substances in the WQA listing, tied for the most among the 32 under-sink filters
- Price
- $179.99
- Certified for
- Lead · Cysts · VOCs +7
- Flow
- 0.5 gpm
- Cartridge life
- 600 gal
- Cost per year
- $80
- 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 15, 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 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
30 days, unused (10% restocking fee); used filters can’t be returned.
Warranty: 1 year limited. Returns: 30 days, unused (10% restocking fee); used filters can’t be returned. Shipping: not stated by the brand. Source: Brondell data sheet, checked Oct 15, 2026.
Source: Brondell data sheet, checked Oct 15, 2026.
Compared with similar under-sink filters
All 32 under-sink filters →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Brio Premium 11" Under Sink Filter FUS100A11SS | $149.99 | Lead · Cysts +6 | $170 | 1 year (limited) | 9.5/10 | Check price → |
| Brondell Coral UC300 Three-Stage Under SinkTHIS MODEL | $179.99 | Lead · Cysts +8 | $80 | 1 year limited | 10/10 | Check price → |
| Kohler Aquifer Single Cartridge (K-77685) | $187.50 | Lead · Cysts +5 | $165 | 5 years limited | 9.75/10 | Check price → |
| LARQ Advanced Under Sink Filter | $199 | PFAS · Chlorine | $198 | 1 year limited | 9.5/10 | Check price → |
| Hydroviv Under Sink Water Filter | $199.99 | Lead · Cysts +5 | $266 | 5 years | 9/10 | Check price → |
What owners say
Checked Oct 15, 2026- brondell.com brand's own site 4.8/5 224 reviews
4.3/5 from 692 ratings on Amazon. In our score this is 2 of 2 points. How we score
- Quality188 mentions166 positive22 negative
- Installation176 mentions168 positive8 negative
- Taste132 mentions114 positive18 negative
- Effectiveness80 mentions69 positive11 negative
- Value for money75 mentions60 positive15 negative
- Water clarity50 mentions37 positive13 negative
Store ratings change over time; the date shows when we checked.