NSF 44 filters for hardness
NSF, WQA, or IAPMO listing to NSF/ANSI 44 for Hardness (as CaCO3). Certified is a listing, not a ranking.
Affiliate listings These are paid Amazon links. As an Amazon Associate, Tap and Well earns a commission from qualifying purchases if you buy. Rankings come from the matching engine (certification, flagged contaminants, annual cost), not from who pays more. Affiliate disclosure.
| Product | Certifier | Checked | From |
|---|---|---|---|
| Fleck 5600SXT 48,000 Grain Water Softener | WQA | not yet | |
| GE 40,000 Grain Smart Water Softener | NSF | not yet | |
| GE GXSH45V 45,100 Grain Water Softener | NSF | 2026-09-14 | |
| Whirlpool WHES30E 30,000 Grain Water Softener | NSF | 2026-09-14 | |
| Whirlpool WHES33 33,000 Grain Water Softener | NSF | 2026-09-14 | |
| Whirlpool WHES40E 40,000 Grain Water Softener | NSF | not yet |