GE 40,000 Grain Smart Water Softener review
Salt-based water softener. DIY if you are comfortable with this install. Listed to NSF/ANSI 44.
What it removes
| Contaminant | Evidence | Stated reduction | Scope |
|---|---|---|---|
| Hardness (as CaCO3) | Certified | not stated | |
| Iron | Manufacturer-reported | 80% |
Certified is an NSF, WQA, or IAPMO listing for that claim. Manufacturer-reported reduction for iron. Not NSF-certified for iron.
Whole-house hardness at 7 gpg or more. Does not remove arsenic, nitrate, or fluoride.
Certifications
- NSF/ANSI 44: Barium Reduction (listing checked 2026-09-14)
- NSF/ANSI 44: Efficiency Rated (listing checked 2026-09-14)
- NSF/ANSI 44: hardness (from the manufacturer's page, not yet checked against the certifier's database)
- NSF/ANSI 44: Radium 226/228 Reduction (listing checked 2026-09-14)