Water softener (salt) · checked 16 Oct 2026
Aquasana SimplySoft 40,000 Grain Water Softener
Model WH-SF40
Each claim, checked
What the brand says, what a certification listing shows for this model, and where each fact comes from. We read listings; we do not test products.
- Certified (listing checked)The certifier’s public listing shows this claim for this model.
- Brand says certifiedThe brand says certified; IAPMO’s listing does not show it. NSF can be checked by hand.
- Brand claim onlyThe brand claims it without citing a certification.
| Contaminant | Brand claim | Standard | Certifier | Confirmed? | Source, date checked |
|---|---|---|---|---|---|
| Hardness | “This system is IAPMO certified to NSF/ANSI Standard 44 for the reduction of water hardness and to CSA B483.1.” brand source | CSA B483.1 | IAPMOfile WP-11575 | Certified — IAPMO listing, checked 16 Oct 2026 | IAPMO listingchecked 16 Oct 2026 |
Filter changes, by the brand’s numbers
How often Aquasana says to replace each part. Real filter life depends on how much water you use and what is in it.
| Part | Brand says replace every | Changes a year | Source, date checked |
|---|---|---|---|
| 20" sediment pre-filter (included with the softener) | 2 months“20" Pre-Filter Replacement - 3 Pack Replace every 2 months” | 6 | brand sourcechecked 16 Oct 2026 |
Certification listings found
IAPMO · CSA B483.1 · file WP-11575
AQUASANA, INC lists WH-SF40, WH-SF60
Hardness
Open the listing · checked 16 Oct 2026
IAPMO · NSF/ANSI 44 · file WP-16886
AQUASANA, INC lists WH-SF40, WH-SF60
Hardness
Open the listing · checked 16 Oct 2026
IAPMO · NSF/ANSI/CAN 372 · file WP-16887
AQUASANA, INC lists WH-SF40, WH-SF60
Materials only (no reduction claim)
Open the listing · checked 16 Oct 2026
Check it yourself
NSF’s and WQA’s terms don’t allow automated lookups, so these links open their public listings for this model:
- NSF listing search: WH-SF40
- NSF listing search: Aquasana
- WQA listing search: WH-SF40
- WQA listing search: Aquasana
- IAPMO R&T listing directory
What the brand says about certification
- “IAPMO certified to NSF/ANSI Standard 44 for the reduction of water hardness and to CSA B483.1.” source checked 16 Oct 2026
- “Certified by IAPMO R&T against NSF/ANSI 44 for water hardness, NSF/ANSI/CAN 372 and CSA B483.1.” source checked 16 Oct 2026
- “This product is efficiency rated according to NSF/ANSI 44.” source checked 16 Oct 2026
Performance data sheet (names IAPMO R&T)