Purewell 2.25G 3-Stage Window
The 3-stage Purewell with a water-level window. It costs a little more than the certified PW-OB.
Amazon $158.99$158.99
The Purewell 2.25G 3-Stage Window is the better gravity water filter overall, rated 3.1 to 2.9. The Purewell 2.25G 3-Stage Window leads on value. The Purewell 2.25G 3-Stage Window costs $70.01 less ($158.99 vs $229).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Purewell 2.25G 8-Stage Fluoride
#11 in Up to 2.25 galFull review
For homes with fluoridated water they would rather not drink. Plan on replacing the fluoride filters much sooner than the carbon ones.
Amazon $229$229
Which should you buy?
- Choose the Purewell 2.25G 3-Stage Window for value ($70.66 per gallon of capacity ($158.99, 2.2 gal) vs $101.78 per gallon of capacity ($229, 2.2 gal)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 2.25 gal gravity water filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Purewell 2.25G 3-Stage Window | Purewell 2.25G 8-Stage Fluoride |
|---|---|---|
| Overall rating | 3.1/5 | 2.9/5 |
| Value 25% | 79 $70.66 per gallon of capacity ($158.99, 2.2 gal) | 56 $101.78 per gallon of capacity ($229, 2.2 gal) |
| Running cost 15% | 50 replacement cost or element life not published (neutral score used) | 50 replacement cost or element life not published (neutral score used) |
| Capacity 15% | 17 2.2 gal tank | 17 2.2 gal tank |
| Certification 20% | 0 no certification or test claim published | 0 no certification or test claim published |
| Element life 15% | 100 3,000 gal rated per element | 100 3,000 gal rated per element |
| Warranty 10% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Purewell 2.25G 3-Stage Window | Purewell 2.25G 8-Stage Fluoride | |
|---|---|---|
| Capacity and flow | ||
| Tank capacity | 2.2 gal | 2.2 gal |
| Price per gallon of capacity | $70.66 | $101.78 |
| Elements included | 2 | 4 |
| Maximum elements | 2 | 4 |
| Flow, as shipped | 4 gal/hr | - |
| Filtration | ||
| Element type | Black carbon composite: 0.01 micron UF membrane, silver ion membrane and carbon block | Black carbon filters plus white fluoride filters |
| Certified | None stated | None stated |
| Certification detail | Listing makes no certification claim for this model. | Listing makes no certification claim for this model. |
| Fluoride | - | Included |
| Fluoride element life | - | 1,000 gal |
| Running cost | ||
| Rated life per element | 3,000 gal each | 3,000 gal each |
| Build | ||
| Material | 304 stainless steel | 304 stainless steel |
| Height | 20 in | 20 in |
| Diameter | 8.8 in | 8.8 in |