Waterdrop WHF3T-PG
#3 in CartridgeFull review
A lower priced three stage big blue system for city water. Running cost is hard to judge without a gallon rating.
Amazon $254.99$254.99
The Waterdrop WHF3T-PG is the better whole-house water filter overall, rated 3.2 to 2.2. The Waterdrop WHF3T-PG leads on price and certification. The Waterdrop WHF3T-PG costs $495 less ($254.99 vs $749.99).
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.
iSpring WGB32B-PFKS
#19 in CartridgeFull review
For city water with a PFAS notice, where a cartridge system beats a tank on upfront cost. Budget for the yearly PFAS cartridge.
Amazon $749.99$749.99
Which should you buy?
- Choose the Waterdrop WHF3T-PG for price ($254.99 vs $749.99) and certification (tested to NSF/ANSI 42, not certified vs no certification in a public listing, no tested to claim).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every cartridge whole-house water filter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Waterdrop WHF3T-PG | iSpring WGB32B-PFKS |
|---|---|---|
| Overall rating | 3.2/5 | 2.2/5 |
| Running cost 25% | 50 filter cost or capacity not published (neutral score used) | 50 filter cost or capacity not published (neutral score used) |
| Certification 25% | 30 tested to NSF/ANSI 42, not certified | 0 no certification in a public listing, no tested to claim |
| Flow 15% | 100 15 gpm service flow | 50 flow not published (neutral score used) |
| Price 20% | 68 $254.99 | 4 $749.99 |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Waterdrop WHF3T-PG | iSpring WGB32B-PFKS | |
|---|---|---|
| Filtration | ||
| Capacity | 100,000 gallons | 100,000 gallons |
| Stages | 3 | 3 |
| Tested to (not certified) | NSF/ANSI 42 | - |
| Chloramine | No | Yes |
| PFAS | No | Yes |
| Build | ||
| Flow | 15 gpm | - |
| Ports | 1 in | 1 in |
| UV stage | No | No |
| Warranty | 1 year | 1 year |