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APEC Whole House Max 20

Ranked #18 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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#18

APEC Whole House Max 20

Best for: Heavy-duty whole-house filter listed at 16 GPM service and 20 GPM peak

1.8/10

What we like

    Watch out for

    • Filtration stages not published by APEC
    • Micron rating not published by APEC
    • Warranty not published by APEC

    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    * Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.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 flow16 GPM
    Micron ratingNot listed
    NSF/ANSI 42 or 53 namedNo
    WarrantyNot listed
    Stages (maker)Not listed
    Flow rate (maker)16 GPM service / 20 GPM peak (official specification table)
    Micron rating (maker)Not listed
    NSF/ANSI 42 or 53 (maker)Not listed
    Warranty (maker)Not listed
    Peak flow (maker)20 GPM
    System weight (maker)120 lbs
    PriceCheck price
    Check price at Amazon
    Specs source:

    APEC Whole House Max 20 head-to-head

    Head-to-headAPEC Whole House Max 20 vs APEC Whole House Max 10Head-to-headAPEC Whole House Max 20 vs APEC Whole House Max 15 Featured inBest High-Flow Whole-House Water Filters (2026)

    How it compares

    Open the full comparison table

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    #3 · 5-stage whole-house filter, model WD-WHF2E-FC
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    #4 · 3-stage 20-inch whole-house filter with a lead-reducing cartridge, listed at 15 GPM
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    #5 · 3-stage 20-inch whole-house filter for iron and manganese, listed at 15 GPM
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    #6 · 3-stage 10-inch whole-house sediment and carbon-block filter listed at 15 GPM
    iSpring WGB31BC
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    #7 · 3-stage 10-inch whole-house filter with a clear housing, listed at 15 GPM
    iSpring WGB31BCM
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    #8 · 3-stage 10-inch clear-housing filter for iron and manganese, listed at 15 GPM
    iSpring WGB32B
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    #9 · 3-stage 20-inch Big Blue sediment and carbon-block filter listed at 15 GPM
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    #10 · 3-stage 20-inch KDF whole-house filter listed at 15 GPM
    Aquasure Fortitude Tri-Stage Iron Removal
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    #11 · Tri-stage whole-house iron system listed at 15 GPM with a 100,000-gallon capacity
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    #12 · 4-stage whole-house filter; official page names NSF/ANSI 372 only
    iSpring WGB21B
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    #13 · 2-stage 10-inch whole-house sediment and CTO filter listed at 15 GPM
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    #14 · 2-stage whole-house iron and manganese filter listed at up to 15 GPM and 5 micron
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    #15 · 2-stage 10-inch whole-house filter with an iron and manganese cartridge, listed at 15 GPM
    iSpring WGB22B
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    #16 · 2-stage 20-inch Big Blue sediment and carbon-block filter listed at 15 GPM
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    #17 · 2-stage 20-inch whole-house filter for iron and manganese, listed at 15 GPM
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    #20 · 3-stage whole-house housing officially described as 9-stage filtration, model WD-WHF3E-SKH
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    #21 · 1-stage 20-inch Big Blue whole-house carbon-block filter listed at 15 GPM
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    #22 · 2-stage whole-house filter with a 5-micron heavy-metal sediment cartridge
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    #23 · Heavy-duty whole-house filter listed at 12 GPM service and 16 GPM peak
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    #24 · 2-stage 10-inch whole-house sediment and carbon filter
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    #25 · 2-stage 20-inch whole-house sediment and carbon filter
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    #26 · Heavy-duty whole-house filter listed at 8 GPM service and 12 GPM peak
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    #27 · Whole-house well-water filter officially listed at 5 micron
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    #28 · Whole-house chemical and odor filter in a 9-inch tank
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    #29 · Whole-house chemical, odor and taste filter in a 10-inch tank
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    #30 · Iron, hydrogen sulfide and manganese whole-house filter
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    #32 · Largest Iron Hydro filter in this official series
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    #34 · Fortitude Pro whole-house filter with an official 1,500,000-gallon capacity
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