iSpring WGB32B 3-Stage Whole House Water Filter

Name: iSpring WGB32B 3-Stage Whole House Water Filter
Brand: iSpring
Price: 516.99 USD

Whole-house filter · 15 GPM · Treats sediment · $517 at iSpring as of Oct 2026

The iSpring WGB32B is a three-stage cartridge system in 20 in. by 4.5 in. Big Blue housings: a 5-micron polypropylene sediment cartridge followed by two coconut-shell carbon blocks. It targets sediment, rust and turbidity plus chlorine (up to 99%, a maker claim), taste and odor, THMs and VOCs. iSpring says it suits city and well water but does not filter out viruses or bacteria or reduce TDS, and it does nothing for iron, manganese or sulfur.

Flow is up to 15 GPM through 1 in. female NPT ports on a steel bracket, at 25-80 psi, 40-100 F and pH 6-9. A cartridge set lasts 100,000 gallons or up to 12 months. The system is 24.5 by 8 by 28 in. and 45 lb, with no power, drain or wastewater. The cartridges are described as third-party tested to meet NSF/ANSI standards; no system certification or standard number is cited.

Price was $516.99 at ispringfilter.com as of Oct 2026 (regular price). Warranty is iSpring's standard 1-year limited term, with paid 3-, 5- and 10-year extensions, 30-day money-back and lifetime tech support. Install is DIY with a manual, video and included housing wrench.

Check price at iSpring See it at Amazon

iSpring WGB32B 3-Stage Whole House Water Filter well water whole-house filter

Specifications

Verified 2026-10-06. Fields the manufacturer does not publish are marked “Not stated”.

iSpring WGB32B 3-Stage Whole House Water Filter specifications
Model	WGB32B (20 in. x 4.5 in. cartridges: FP25B sediment + 2x FC25B carbon block)
Type	Whole-house filter
Treats	Sediment; also chlorine (up to 99%, maker claim), taste and odor, THMs, VOCs, rust, turbidity
Service flow	15 GPM'Up to 15 GPM' on the product page; the WGB & WDS series manual gives 'Flow Rate 3-15 GPM', 'Working Pressure 25-80 psi', 'Working Temperature 40-100F', 'pH Requirement 6.0-9.0'. Page FAQ: the system does not address TDS reduction.
Capacity	100,000 gallons100,000 gallons or up to 12 months per cartridge set; replacement every 6-12 months. Sediment cartridge is 5 micron.
Media / technology	5-micron polypropylene sediment cartridge + two coconut-shell carbon block (CTO) cartridges
Stages	3
Connection	1 in. FNPT
Installation	DIY'DIY Installation: Yes - comes with manual and step-by-step video guide'. 1 in. female NPT ports on a steel bracket; housing wrench included.
Warranty	1-year manufacturer warrantyiSpring standard '1-year limited warranty' (stated on the WGB21B/WGB32BM pages and iSpring's Amazon listings); extended 3/5/10-year warranties sold as paid options on the product page. 30-day money-back; lifetime tech support.
Certifications	Not statedProduct page: the second and third stage carbon block filters 'use quality coconut shell carbon—tested by a third-party to meet NSF/ANSI standards'; also 'Independent lab testing proves that iSpring filters remove significantly more chlorine than other leading brands'. No standard number, no certifier and no system certification is stated; the manual contains no certification statement. iSpring's 'NSF Certified Collections' page does not list any WGB model. WQA certified-product search (find.wqa.org) returned zero results for 'iSpring', 'iSpring Water', '123Filter', 'WGB32B' and 'RCC7AK' on 2026-10-06 (a control search for 'Culligan' returned listings). NSF certified-product database (info.nsf.org), searched 2026-10-06: iSpring Water Systems LLC (Cumming, GA) is listed only under NSF/ANSI 58 (RO systems) and NSF/ANSI/CAN 372 (WSP ...ARJ spin-down variants). WGB32B does not appear.
Dimensions	24.5 x 8 x 28 in.
Weight	45 lb
Price	$517 at iSpring as of Oct 2026

Published features

3-stage 20 in. x 4.5 in. 'Big Blue' housings
5-micron sediment pre-filter
Two coconut-shell carbon block cartridges for up to 99% chlorine reduction (maker claim)
100,000 gallon / 12-month cartridge life
Up to 15 GPM with 1 in. NPT ports
No power, drain or wastewater
DIY install with manual and video

Pros and cons

Pros

15 GPM in a compact cartridge system with no drain or power
Standard 20 in. x 4.5 in. cartridges are widely available
Amazon listing in stock for the exact model

Cons

Does not reduce iron, manganese, sulfur or bacteria; carbon-only treatment for well water
Only a 1-year standard warranty
Cartridges are 'tested to' NSF/ANSI standards, not system-certified

Our take

The WGB32B is a taste-and-odor and sediment polisher for a well whose test came back clean for iron, manganese and bacteria, or as the finishing stage after an iron filter. On an iron well the WGB32BM with its iron and manganese cartridge is the better buy for $19 more. Standard 20 in. cartridges keep replacement easy; the 1-year warranty is the weak point.

Not sure it is the right size for your flow and your water test? Work through the sizing guide, or compare every system we cover on the best well water filtration systems (2026) list.

Where to buy

$517 at iSpring as of Oct 2026. Prices change; the links open the current listing.