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Head-to-head · Best Whole-House Water Filters

Culligan WH-HS-400 Whole House Water Filtration System vs iSpring WGB32B 3-Stage Whole House Water Filtration System

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Culligan WH-HS-400 Whole House Water Filtration System and iSpring WGB32B 3-Stage Whole House Water Filtration System score essentially the same (4.5 vs 4.5). Pick the one whose trade-offs match your priorities — the strengths and watch-outs below are where they actually differ.

Culligan WH-HS-400 Whole House Water Filtration System
Ranked #1 in Best Whole-House Water Filters
Culligan WH-HS-400 Whole House Water Filtration System
3 sources2 derived$72.47as of Jul 31

Culligan's WH-HS-400 Whole House Water Filtration System pairs strong contaminant reduction with smart features, and PFAS removal is where it performs best. Reviews point to its handling of well water problems like iron and sediment, and users like the Culligan Connect App for remote monitoring and service alerts. The cost is higher than most and installation isn't simple, but many owners report water quality improving throughout the house. Households wanting comprehensive whole-house filtration should look here; tight budgets and simple water concerns shouldn't.

Strengths
  • — Reduces over 90 contaminants including 99% PFAS reduction with Total Defense filter
  • — Smart HE filtration technology with Culligan Connect App for remote monitoring
  • — Effective at tackling common well and municipal water problems like iron, sediment, and chlorine
Watch-outs
  • — Installation requires professional setup and may involve plumbing modifications
  • — Higher upfront cost compared to basic carbon filtration systems
$72.47 · Check Price on AmazonFull review →
iSpring WGB32B 3-Stage Whole House Water Filtration System
Ranked #2 in Best Whole-House Water Filters
iSpring WGB32B 3-Stage Whole House Water Filtration System
2 sources1 derived$758as of Jul 31

The iSpring WGB32B is a 3-stage whole house system aimed at city water, cutting chlorine, sediment, and odors without sacrificing flow rate. Reviewers measured a steady 15 GPM output and filters that last up to 100,000 gallons per cycle. Quality Water Lab rated it 4.5/5, praising how easy it is to install and maintain yourself. It isn't recommended for well water or homes fighting heavy metals. Households that want a budget-friendly, low-maintenance way to improve taste and clarity while keeping beneficial minerals are the fit.

Strengths
  • — Reduces up to 99% chlorine, sediment, rust, tastes, and odors
  • — Maintains steady water flow rate up to 15 GPM with minimal pressure loss
  • — 3-stage filtration system with NSF/ANSI compliant sediment and carbon block filters
Watch-outs
  • — Not suitable for well water or heavy metal contamination
  • — Sediment filter may clog faster in older homes with rusty plumbing
$758 · Check Price on AmazonFull review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Culligan WH-HS-400 Whole House Water Filtration System

The Culligan WH-HS-400 stands out with its Total Defense filter and Culligan Connect App, features not found in the iSpring WGB32B or APEC ESSENCE systems, though it comes with a higher price tag and professional installation requirement compared to more budget-friendly options like the Waterdrop WHS-1000.

iSpring WGB32B 3-Stage Whole House Water Filtration System

The iSpring WGB32B stands out for its consistent 15 GPM flow rate and minimal pressure loss, features not matched by the Aquasure systems, and it's more affordable than the Culligan WH-HS-400. However, unlike the Home Master TMHFC, it doesn't offer mineral-infused water or the 1:1 water waste ratio, and it's not suitable for well water applications.

Specs side-by-side

SpecCulligan WH-HS-400 Whole House Water Filtration SystemiSpring WGB32B 3-Stage Whole House Water Filtration System
Filter TypeCarbon-basedSediment + Carbon Block
Contaminant ReductionOver 90 contaminantsSediment, Taste, Odor, and up to 99% Chlorine
System TypeWhole houseSediment + Carbon Block
Capacity16,000 gal100,000 gal
MaterialStainless SteelSediment, Carbon Block
Stages4-Stage3-Stage
CertificationsNSF/ANSI 372, 42, CSA B483.1NSF/ANSI standards
Dimensions9" D x 48" H24.50"L x 8.00"W x 28.00"H
Flow Rate—15 GPM
Connection Size—1" NPT
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