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 2.4. The iSpring WGB22B leads on certification, running cost and price. The iSpring WGB22B costs $216.42 less ($286.70 vs $503.12).
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.
Express Water Anti-Scale WH300SCPS
#16 in CartridgeFull review
For hard city water where scale on the water heater is the main worry but a softener is too much. It doesn’t soften.
Amazon $503.12$503.12
Which should you buy?
- Choose the iSpring WGB22B for certification (tested to NSF/ANSI 42, not certified vs no certification in a public listing, no tested to claim), running cost ($0.83 per 1,000 gallons ($82.97 every 100,000 gallons) vs $1.84 per 1,000 gallons ($183.67 every 100,000 gallons)) and price ($286.70 vs $503.12).
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 | Express Water Anti-Scale WH300SCPS |
|---|---|---|
| Overall rating | 3.1/5 | 2.4/5 |
| Running cost 25% | 47 $0.83 per 1,000 gallons ($82.97 every 100,000 gallons) | 18 $1.84 per 1,000 gallons ($183.67 every 100,000 gallons) |
| 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 | 100 15 gpm service flow |
| Price 20% | 61 $286.70 | 28 $503.12 |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| iSpring WGB22B | Express Water Anti-Scale WH300SCPS | |
|---|---|---|
| Filtration | ||
| Capacity | 100,000 gallons | 100,000 gallons |
| Replacement filters or media | $82.97 | $183.67 |
| Running cost | $0.83 per 1,000 gal | $1.84 per 1,000 gal |
| Stages | 2 | 3 |
| Tested to (not certified) | 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 |