Water System Guide is an independent research publisher, not a manufacturer, dealer, installer, utility, or laboratory.
What is verified
- Exact identity: WH-SF40, manufacturer product number 100381840
- Demand-initiated residential cation exchange with salt regeneration
- IAPMO R&T active file WP-16886 lists exact model WH-SF40 under NSF/ANSI 44-2022 for hardness reduction and identifies it as efficiency rated.
- Five years for the control valve, ten years for the pressure vessel and brine tank, and twelve months for named included installation and pre/post-filter housing components, subject to the exact warranty conditions.
Cost and quote state
Archived price evidence: Aquasana's direct storefront displayed USD 849.00 (sale price; MSRP USD 1,698.00) for exact model WH-SF40 / product 100381840 when re-observed on 16 September 2026, with the product shown In Stock and Add to Cart enabled. This is an observed equipment price only; installation, plumbing, permits, freight, taxes and service are excluded. The observation expires 16 October 2026 and is not a guarantee of price.
Observed Sep 16, 2026 · pricing verification expires Oct 16, 2026 · equipment price only, not an installed total. This is a historical source observation, not a current offer. After the verification expiry date, a new seller check is required.Serviceability and local boundary
Exact-model manufacturer-direct support is verified at Level 3 through the current owner manual and warranty service channel. Houston exact-model serviceability has not yet been verified.
Houston relevance is limited to address- and PWS-scoped hardness-treatment evaluation. It is not a household need, fit, sizing, compensated-hardness setting, availability, serviceability, or provider-match conclusion.
Current stock is not established by this research snapshot. Confirm availability directly with the seller. The source note below is historical; its verification expiry does not refresh automatically.
Archived direct-availability note: Level 4 current exact-model availability was observed as In Stock (Add to Cart enabled) on Aquasana's direct storefront on 16 September 2026; that observation expires 16 October 2026. This observation is not a guarantee of future stock, orderability, delivery timing, installation scheduling, or Houston service.
Compare approved models
Compare normalized fields using only data frozen in approved snapshots.
Compare approved softeners →Related models and brand hub
This page documents the exact model only. The parent brand record carries the licence, warranty and certification-structure context that no single model page can hold.
- All Aquasana water-treatment systems — parent brand hub
- Aquasana Clean Water Machine — related countertop
- Aquasana Claryum 2-Stage — related drinking-water filtration
- Aquasana Claryum 3-Stage — related drinking-water filtration
- Aquasana Claryum 3-Stage Max Flow — related drinking-water filtration
Revision and provenance
- Approved revision
8cb9280083e4fb9b8db3d48afeb0d74cc74b23b9c8adcdbc6a2049ba72ba3068- Snapshot
abdfa29edbdf679262cd9478bc6eeb17d8070006ea998c820979b2df24041947- Independent QA
0334e32473f765b329b226ce0db8ec4b8e8ed47f57b9613fc54b612173bcfed0
Evidence sources
- Aquasana WH-SF40 and WH-SF60 owner manualAquasana · retrieved 2026-08-13
- Aquasana WH-SF40 and WH-SF60 performance data sheetAquasana · retrieved 2026-08-13
- Aquasana SimplySoft 40,000 and 60,000 Grain Softener limited warrantyAquasana · retrieved 2026-08-13
- IAPMO R&T product listing search result for AquasanaIAPMO R&T · retrieved 2026-08-13
- IAPMO R&T certificate preview for active file WP-16886IAPMO R&T · retrieved 2026-08-13
- City of Houston 2025 Water Quality ReportCity of Houston · retrieved 2026-08-13
- Aquasana SimplySoft 40,000 Grain Softener product page — live re-observationAquasana (manufacturer-direct storefront) · retrieved 2026-09-16