4Patriots Patriot Pure Ultimate review
By Daryna Klochko · Published · Specs checked Oct 14, 2026 · 
Scores 9.5/10, tied for 2nd of the 18 gravity filters we track. At $249 it costs the same as the category median of $249. 4Patriots also claims Microplastics, which is not in the listing. Its cartridge cost of about $146 a year is below the $168-a-year median of the 13 gravity filters with a stated cartridge cost.
A certified health claim: IAPMO lists it for Chlorine, Lead, VOCs, one of 7 among the 18 gravity filters
A long warranty matters: 1 year, under the 3-year category median
- Price
- $249
- Certified for
- Lead · VOCs · PFAS +8
- Flow
- Not stated
- Cartridge life
- 200 gal
- Cost per year
- $146
- Warranty
- 365 days limited
Certification
Listed by IAPMO under NSF/ANSI 42 · 53 · 401 for Chlorine, Lead, VOCs, PFOA/PFOS, Arsenic, checked Oct 14, 2026. 4Patriots also claims 1 more substance that is not in the listing. Search the IAPMO listings
- Chlorine
- Lead
- VOCs
- PFOA/PFOS
- Arsenic
4Patriots also claims Microplastics: 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 14, 2026. What a listing means and what it doesn't
Specs and sources
Checked Oct 14, 2026 · source under each valueFiltration
Cartridges and install
Buying
Warranty, returns and shipping
Warranty: 365 days limited. Returns: 90 days. Shipping: not stated by the brand. Source: 4patriots.com, checked Oct 14, 2026.
Source: 4patriots.com, checked Oct 14, 2026.
Compared with similar gravity filters
All 18 gravity filters →| Model | Price | Certified for | Cost per year | Warranty | Score | Where to buy |
|---|---|---|---|---|---|---|
| Culligan MaxClear Venture 3-Gallon | $199 | Lead · PFAS +3 | $382 | 5 years (limited) | 9.25/10 | Check price → |
| Waterdrop King Tank 2.25-Gallon | $199.99 | Brand claims only | $35 | 1 year | 8.75/10 | Check price → |
| 4Patriots Patriot Pure UltimateTHIS MODEL | $249 | Lead · VOCs +9 | $146 | 365 days limited | 9.5/10 | |
| Doulton British Berkefeld Duchess 1.58-Gallon | $255 | Cysts · Microplastics | $168 | Lifetime | 9.5/10 | Check price → |
| Alexapure Pro | $279.99 | Brand claims only | $237 | Not stated | 8.5/10 | Check price → |
