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Approved research · index eligible

iSpring WGB32B 3-Stage 20-Inch Whole-House Water Filter

WGB · Three-stage 20-inch Big Blue point-of-entry filtration (5-micron sediment + two carbon-block stages)

Manufacturer number
WGB32B
Product category
Whole-house water filters
Evidence profile
7/7 complete
Pricing state
$516.99 historical observation
Sales model
Manufacturer-direct / DTC
Last verified
2026-09-16

Water System Guide is an independent research publisher, not a manufacturer, dealer, installer, utility, or laboratory.

What is verified

  • Exact identity: WGB32B, manufacturer product number WGB32B
  • Three-stage 20-inch Big Blue point-of-entry filtration (5-micron sediment + two carbon-block stages)
  • No complete-system NSF/ANSI row for WGB32B appears in the certifier roster captures retained for the iSpring line. The product page describes coconut-shell carbon media "tested by a third-party to meet NSF/ANSI standards"; that is a media/materials statement and is NOT presented here as an exact-model complete-system certification for WGB32B. This is a dated absence in the captured rosters, not proof of non-certification.
  • Extended-warranty tiers offered on the product page: 3-year USD 310.19, 5-year USD 516.99, 10-year USD 516.99. The base manufacturer warranty term was not captured in this review and is not asserted.

Cost and quote state

$516.99 historical equipment-price observation

Archived price evidence: iSpring's manufacturer-direct product page displayed USD 516.99 for the exact model WGB32B when re-observed on 16 September 2026, alongside paid extended-warranty tiers. 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 support

Exact-model serviceability has been verified at Level 3 through the manufacturer-direct channel (iSpring Water Systems LLC product page, published replacement-filter packs and extended-warranty programme observed 2026-09-16); Houston exact-model serviceability has not yet been verified. No Houston installer claim is made.

Houston relevance is limited to address- and PWS-scoped water-quality evaluation (2025 City of Houston Water Quality Report hardness data). It is not a household need, fit, sizing, contaminant-specific suitability, 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 listed In Stock with a displayed storefront price on iSpring's manufacturer-direct product page 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.

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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.

Revision and provenance

Approved revision
77801a167ae025279267bb7b011867a634313ee0531038ca4473055b36daed6d
Snapshot
6eee000b39fc1bbf8a9728588f3cbc3208adbc2a740761dd1be03d02e6edf6b1
Independent QA
2294d9447f2d65affc0b8543a3c85a15b7aaabc9985805fdb7c4f956d0de2522

Evidence sources