GE GXWH70M Smart
#7 in CartridgeFull review
A single filter for chlorine taste with a built in leak detector and shutoff. Worth it if the leak protection is what you want.
Amazon $194.65$194.65
The GE GXWH70M Smart is the better whole-house water filter overall, rated 3.0 to 2.6. The GE GXWH70M Smart leads on certification, running cost and price. The GE GXWH70M Smart costs $36.34 less ($194.65 vs $230.99).
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 WGB21B-PB
#13 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
Which should you buy?
- Choose the GE GXWH70M Smart for certification (certified to NSF/ANSI 42 vs no certification in a public listing, no tested to claim), running cost ($1.93 per 1,000 gallons ($28.98 every 15,000 gallons) vs $2.44 per 1,000 gallons ($121.99 every 50,000 gallons)) and price ($194.65 vs $230.99).
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 | GE GXWH70M Smart | iSpring WGB21B-PB |
|---|---|---|
| Overall rating | 3.0/5 | 2.6/5 |
| Running cost 25% | 16 $1.93 per 1,000 gallons ($28.98 every 15,000 gallons) | 8 $2.44 per 1,000 gallons ($121.99 every 50,000 gallons) |
| Certification 25% | 60 certified to NSF/ANSI 42 | 0 no certification in a public listing, no tested to claim |
| Flow 15% | 50 flow not published (neutral score used) | 100 15 gpm service flow |
| Price 20% | 84 $194.65 | 74 $230.99 |
| Warranty 15% | 0 1-year warranty | 0 1-year warranty |
Specifications
| GE GXWH70M Smart | iSpring WGB21B-PB | |
|---|---|---|
| Filtration | ||
| Capacity | 15,000 gallons | 50,000 gallons |
| Replacement filters or media | $28.98 | $121.99 |
| Running cost | $1.93 per 1,000 gal | $2.44 per 1,000 gal |
| Stages | 1 | 2 |
| Certified | NSF/ANSI 42 | - |
| Chloramine | No | Yes |
| PFAS | No | No |
| Build | ||
| Flow | - | 15 gpm |
| Ports | 0.8 in | 1 in |
| UV stage | No | No |
| Warranty | 1 year | 1 year |