iSpring WGB21B-PB
#11 in CartridgeFull review
For homes worried about lead pipes or with chloramine treated water. The lead claim is not certified, so test the water if lead is the main concern.
Amazon $230.99$230.99
The iSpring WGB21B-PB is the better whole-house water filter overall, rated 2.6 to 2.3. The iSpring WGB21B-PB leads on flow and price. The Home Master HMF2SmgCC wins on running cost and warranty. The iSpring WGB21B-PB costs $144.69 less ($230.99 vs $375.68).
Home Master HMF2SmgCC
#12 in CartridgeFull review
A cartridge system built for chloramine treated city water, with a longer warranty than most at this price.
Amazon $375.68$375.68
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 WGB21B-PB for flow (15 gpm service flow vs 10 gpm service flow) and price ($230.99 vs $375.68).
- Choose the Home Master HMF2SmgCC for running cost ($1.79 per 1,000 gallons ($169.90 every 95,000 gallons) vs $2.44 per 1,000 gallons ($121.99 every 50,000 gallons)) and warranty (2-year warranty vs 1-year warranty).
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 WGB21B-PB | Home Master HMF2SmgCC |
|---|---|---|
| Overall rating | 2.6/5 | 2.3/5 |
| Running cost 25% | 8 $2.44 per 1,000 gallons ($121.99 every 50,000 gallons) | 19 $1.79 per 1,000 gallons ($169.90 every 95,000 gallons) |
| Certification 25% | 0 no certification in a public listing, no tested to claim | 0 no certification in a public listing, no tested to claim |
| Flow 15% | 100 15 gpm service flow | 50 10 gpm service flow |
| Price 20% | 74 $230.99 | 45 $375.68 |
| Warranty 15% | 0 1-year warranty | 11 2-year warranty |
Specifications
| iSpring WGB21B-PB | Home Master HMF2SmgCC | |
|---|---|---|
| Filtration | ||
| Capacity | 50,000 gallons | 95,000 gallons |
| Replacement filters or media | $121.99 | $169.90 |
| Running cost | $2.44 per 1,000 gal | $1.79 per 1,000 gal |
| Stages | 2 | 2 |
| Chloramine | Yes | Yes |
| PFAS | No | No |
| Build | ||
| Flow | 15 gpm | 10 gpm |
| Ports | 1 in | 1 in |
| UV stage | No | No |
| Warranty | 1 year | 2 years |