Frizzlife MK99 Under Sink Water Filter 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 $69.99 it costs less than half the category median of $199.50. Frizzlife also claims PFOA/PFOS, which is not in the listing. Buyers on Amazon rate it 4.5/5 across 6,384 ratings.
A lower budget: $69.99, in the cheapest quarter of the 32 under-sink filters
- Price
- $69.99
- Certified for
- Lead · Cysts · Chlorine
- Flow
- 0.5 gpm
- Cartridge life
- 800 gal
- Cost per year
- $80
- Warranty
- 1 year
Certification
Listed by IAPMO under NSF/ANSI 42 · 53 for Chlorine, Lead, Cysts, checked Oct 15, 2026. Frizzlife also claims 1 more substance that is not in the listing. Search the IAPMO listings
- Chlorine
- Lead
- Cysts
Frizzlife also claims PFOA/PFOS: 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
1 year; “150% coverage” if registered (brand).
30 days, unused and in original packaging (frizzlife.com).
Warranty: 1 year; “150% coverage” if registered (brand). Returns: 30 days, unused and in original packaging (frizzlife.com). Shipping: not stated by the brand. Source: frizzlife.com, checked Oct 15, 2026.
Source: frizzlife.com, 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 |
|---|---|---|---|---|---|---|
| Waterdrop 10UA Under Sink Filter | $58.99 | Chlorine | $31 | 1 year | 9.5/10 | Check price → |
| Frizzlife MK99 Under Sink Water FilterTHIS MODEL | $69.99 | Lead · Cysts +1 | $80 | 1 year | 10/10 | Check price → |
| 3M Aqua-Pure Filtrete Maximum Under Sink System (3US-MAX-S01) | $73.25 | Lead · Cysts +7 | $140 | 1 year | 10/10 | See specs → |
| Waterdrop 15UA Under Sink Filter | $76.99 | Chlorine | $18 | 1 year | 9.5/10 | Check price → |
| A. O. Smith AO-MF Direct Connect Faucet Filter | $79.99 | Lead · Cysts +4 | $110 | 1 year limited | 10/10 | Check price → |
What owners say
Checked Oct 15, 20264.5/5 from 6,384 ratings on Amazon. In our score this is 2 of 2 points. How we score
- Quality761 mentions688 positive73 negative
- Taste590 mentions538 positive52 negative
- Ease of use175 mentions126 positive49 negative
- Leakage127 mentions42 positive85 negative
- Filter replacement114 mentions74 positive40 negative
- Water flow100 mentions78 positive22 negative
Store ratings change over time; the date shows when we checked.