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iSpring WGB32BM

Ranked #5 of 35 in Best Whole-House Water Filters (2026). Here is every spec we scored, where it came from, and how it compares.

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#5

iSpring WGB32BM

Best for: 3-stage 20-inch whole-house filter for iron and manganese, listed at 15 GPM

2.7/10

What we like

    Watch out for

      Score breakdown

      Filtration stages 22%
      Service or listed flow 30%
      Micron rating 16%
      NSF/ANSI 42 or 53 named 20%
      Warranty 12%
      Filtration stages3
      Service or listed flow15 GPM
      Micron rating5 µm
      NSF/ANSI 42 or 53 namedNo
      Warranty1 yr
      Stages (maker)3 stages
      Flow rate (maker)15 GPM (official collection listing)
      Micron rating (maker)5 micron (official collection listing)
      NSF/ANSI 42 or 53 (maker)Not listed
      Warranty (maker)1-year manufacturer warranty (official page)
      PriceCheck price
      Check price at Amazon
      Specs source:

      How it compares

      Open the full comparison table

      iSpring WGB32B-KSNC
      4.7/10
      #1 · 3-stage 20-inch chloramine and heavy-metals filter; official page names NSF/ANSI 42
      iSpring WCF200K
      3.2/10
      #2 · Elite Series central whole-house filtration system listed at 26 GPM
      Waterdrop WHF2E-FC
      2.8/10
      #3 · 5-stage whole-house filter, model WD-WHF2E-FC
      iSpring WGB32B-PB
      2.7/10
      #4 · 3-stage 20-inch whole-house filter with a lead-reducing cartridge, listed at 15 GPM
      iSpring WGB31B
      2.7/10
      #6 · 3-stage 10-inch whole-house sediment and carbon-block filter listed at 15 GPM
      iSpring WGB31BC
      2.7/10
      #7 · 3-stage 10-inch whole-house filter with a clear housing, listed at 15 GPM
      iSpring WGB31BCM
      2.7/10
      #8 · 3-stage 10-inch clear-housing filter for iron and manganese, listed at 15 GPM
      iSpring WGB32B
      2.7/10
      #9 · 3-stage 20-inch Big Blue sediment and carbon-block filter listed at 15 GPM
      iSpring WGB32B-KS
      2.7/10
      #10 · 3-stage 20-inch KDF whole-house filter listed at 15 GPM
      Aquasure Fortitude Tri-Stage Iron Removal
      2.7/10
      #11 · Tri-stage whole-house iron system listed at 15 GPM with a 100,000-gallon capacity
      Waterdrop WHF2E-PC
      2.3/10
      #12 · 4-stage whole-house filter; official page names NSF/ANSI 372 only
      iSpring WGB21B
      2.2/10
      #13 · 2-stage 10-inch whole-house sediment and CTO filter listed at 15 GPM
      Waterdrop WD-WHF21-PG
      2.2/10
      #14 · 2-stage whole-house iron and manganese filter listed at up to 15 GPM and 5 micron
      iSpring WGB21BM
      2.2/10
      #15 · 2-stage 10-inch whole-house filter with an iron and manganese cartridge, listed at 15 GPM
      iSpring WGB22B
      2.2/10
      #16 · 2-stage 20-inch Big Blue sediment and carbon-block filter listed at 15 GPM
      iSpring WGB22BM
      2.2/10
      #17 · 2-stage 20-inch whole-house filter for iron and manganese, listed at 15 GPM
      APEC Whole House Max 20
      1.8/10
      #18 · Heavy-duty whole-house filter listed at 16 GPM service and 20 GPM peak
      Aquasure Fortitude Lite 800,000 Gallons
      1.8/10
      #19 · Fortitude Lite whole-house filter with an official 800,000-gallon capacity and a 5-year limited warranty
      Waterdrop WHF3E-SKH
      1.7/10
      #20 · 3-stage whole-house housing officially described as 9-stage filtration, model WD-WHF3E-SKH
      iSpring WGB12B
      1.6/10
      #21 · 1-stage 20-inch Big Blue whole-house carbon-block filter listed at 15 GPM
      Waterdrop WHF21-PBH
      1.2/10
      #22 · 2-stage whole-house filter with a 5-micron heavy-metal sediment cartridge
      APEC Whole House Max 15
      1.2/10
      #23 · Heavy-duty whole-house filter listed at 12 GPM service and 16 GPM peak
      Aquasure Fortitude V 10-Inch 2-Stage
      1.2/10
      #24 · 2-stage 10-inch whole-house sediment and carbon filter
      Aquasure Fortitude V 20-Inch 2-Stage
      1.2/10
      #25 · 2-stage 20-inch whole-house sediment and carbon filter
      APEC Whole House Max 10
      0.6/10
      #26 · Heavy-duty whole-house filter listed at 8 GPM service and 12 GPM peak
      Waterdrop WHF21-SH
      0.6/10
      #27 · Whole-house well-water filter officially listed at 5 micron
      APEC Green Carbon 10
      0.6/10
      #28 · Whole-house chemical and odor filter in a 9-inch tank
      APEC Green Carbon 15
      0.6/10
      #29 · Whole-house chemical, odor and taste filter in a 10-inch tank
      APEC Iron Hydro 10
      0.6/10
      #30 · Iron, hydrogen sulfide and manganese whole-house filter
      APEC Iron Hydro 15
      0.6/10
      #31 · Larger Iron Hydro filter for iron, hydrogen sulfide and manganese
      APEC Iron Hydro 20
      0.6/10
      #32 · Largest Iron Hydro filter in this official series
      Aquasure Fortitude Pro 1,000,000 Gallons
      0.6/10
      #33 · Fortitude Pro whole-house filter with an official 1,000,000-gallon capacity
      Aquasure Fortitude Pro 1,500,000 Gallons
      0.6/10
      #34 · Fortitude Pro whole-house filter with an official 1,500,000-gallon capacity
      Aquasure Fortitude Pro 600,000 Gallons
      0.6/10
      #35 · Fortitude Pro whole-house filter with an official 600,000-gallon capacity