iSpring WGB22B
#5 in CartridgeFull review
A sensible upgrade on the WGB21B for a family on chlorinated city water, with filters that last longer and cost little per gallon.
Amazon $286.70$286.70
The iSpring WGB22B is the better whole-house water filter overall, rated 3.1 to 2.9. The iSpring WGB22B leads on price and running cost. The iSpring WGB22B costs $133.30 less ($286.70 vs $420).
iSpring WGB32B
#7 in CartridgeFull review
For a larger house on city water that wants more carbon than a two stage system. The three filter set costs more to replace.
Amazon $420$420
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the iSpring WGB22B for price ($286.70 vs $420) and running cost ($0.83 per 1,000 gallons ($82.97 every 100,000 gallons) vs $1.15 per 1,000 gallons ($114.99 every 100,000 gallons)).
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 | iSpring WGB22B | iSpring WGB32B |
|---|---|---|
| Overall rating | 3.1/5 | 2.9/5 |
| Running cost 25% | 47 $0.83 per 1,000 gallons ($82.97 every 100,000 gallons) | 35 $1.15 per 1,000 gallons ($114.99 every 100,000 gallons) |
| Certification 25% | 30 tested to NSF/ANSI 42, not certified | 30 tested to NSF/ANSI 42, not certified |
| Flow 15% | 100 15 gpm service flow | 100 15 gpm service flow |
| Price 20% | 61 $286.70 | 38 $420 |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| iSpring WGB22B | iSpring WGB32B | |
|---|---|---|
| Filtration | ||
| Capacity | 100,000 gallons | 100,000 gallons |
| Replacement filters or media | $82.97 | $114.99 |
| Running cost | $0.83 per 1,000 gal | $1.15 per 1,000 gal |
| Stages | 2 | 3 |
| Tested to (not certified) | NSF/ANSI 42 | NSF/ANSI 42 |
| Chloramine | No | No |
| PFAS | No | No |
| Build | ||
| Flow | 15 gpm | 15 gpm |
| Ports | 1 in | 1 in |
| UV stage | No | No |
| Warranty | 1 year | 1 year |