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

Aquasure Fortitude Pro 1,500,000 Gallons

Ranked #34 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.

#34

Aquasure Fortitude Pro 1,500,000 Gallons

Best for: Fortitude Pro whole-house filter with an official 1,500,000-gallon capacity

0.6/10

What we like

    Watch out for

    • Filtration stages not published by Aquasure
    • Service or listed flow not published by Aquasure
    • Micron rating not published by Aquasure
    • Warranty not published by Aquasure

    Score breakdown

    Filtration stages * 22%
    Service or listed flow * 30%
    Micron rating * 16%
    NSF/ANSI 42 or 53 named 20%
    Warranty * 12%

    * Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

    Filtration stagesNot listed
    Service or listed flowNot listed
    Micron ratingNot listed
    NSF/ANSI 42 or 53 namedNo
    WarrantyNot listed
    Stages (maker)Not listed
    Flow rate (maker)Not listed
    Micron rating (maker)Not listed
    NSF/ANSI 42 or 53 (maker)Not listed
    Warranty (maker)Not listed
    Capacity (maker)1,500,000 gallon (official product name)
    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 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 600,000 Gallons
    0.6/10
    #35 · Fortitude Pro whole-house filter with an official 600,000-gallon capacity