We may earn a commission when you buy through our links. Rankings are formula-based and never paid for. As an Amazon Associate I earn from qualifying purchases. Disclosure

iSpring WGB32B-PB

Ranked #4 of 35 in Best Whole-House Water Filters (2026). Here is every spec we scored, where it came from, and how it compares.

Affiliate disclosure: We earn a commission if you buy through links on this page, at no extra cost to you. It never affects our rankings, which come from the published scoring formula. As an Amazon Associate I earn from qualifying purchases. Learn more.

#4

iSpring WGB32B-PB

Best for: 3-stage 20-inch whole-house filter with a lead-reducing cartridge, 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)
      Media (maker)Sediment, carbon block and lead-reducing filter
      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 WGB32BM
      2.7/10
      #5 · 3-stage 20-inch whole-house filter for iron and manganese, 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