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APEC ROES-PH75

Ranked #36 of 50 in Best Reverse Osmosis Systems (2026). Here is every spec we scored, where it came from, and how it compares.

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#36

APEC ROES-PH75

Best for: 6-stage 75 GPD alkaline under-sink RO

0.5/10

What we like

    Watch out for

    • Drain water per product gallon not published by APEC
    • Warranty not published by APEC

    Score breakdown

    Daily production 24%
    NSF/ANSI 58 named 20%
    Broader named certification 16%
    Drain water per product gallon * 16%
    Filtration stages 12%
    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    * Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

    Daily production75 GPD
    NSF/ANSI 58 namedNo
    Broader named certificationNo
    Drain water per product gallonNot listed
    Filtration stages6
    WarrantyNot listed
    Daily production (maker)75 gallons per day @ 60 psi and 77 deg F
    Filtration stages (maker)6 stages
    NSF/ANSI 58 (maker)WQA Certified (standard not named on the page we used)
    Broader named certificationNot listed as a broader named certification on the page we used
    Drain ratio (maker)Not listed
    Drain water per product gallonNot listed
    Warranty (maker)Not listed
    Tank capacity (maker)4 gallons
    Alkaline stage (maker)6th-stage calcite remineralizing filter
    Feed water pressure (maker)40-85 psi
    Package weight (maker)27 lbs
    PriceCheck price
    Check price at Amazon
    Specs source:

    How it compares

    Open the full comparison table

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    #2 · 11-stage 1,200 GPD tankless RO, NSF/ANSI 42 and 58 named, 3:1 pure-to-drain
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    #3 · 11-stage 1,200 GPD dual-flow tankless RO, NSF/ANSI 42 and 58 named
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    #4 · 11-stage 1,400 GPD alkaline tankless RO, NSF/ANSI 42 and 58 named
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    #5 · 9-stage 800 GPD tankless RO, NSF/ANSI 42 and 58 named, 2:1 pure-to-drain
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    #6 · 9-stage 800 GPD dual-flow tankless RO, NSF/ANSI 42 and 58 named
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    #7 · 8-stage 600 GPD tankless RO, NSF/ANSI 42 and 58 named, 2:1 pure-to-drain
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    #8 · 9-stage 800 GPD tankless RO with UV, NSF/ANSI 58 named, 3:1 pure-to-drain
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    #9 · NSF/ANSI 58 certified 6-stage 75 GPD alkaline under-sink RO
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    #10 · 5-stage 1000 GPD alkaline tankless RO, NSF/ANSI 58 and 372 named in the official title
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    #11 · 4-stage 1000 GPD tankless RO, NSF/ANSI 58 and 372 named in the official title
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    #12 · NSF/ANSI 58 certified 500 GPD tankless RO with a 2:1 pure-to-drain ratio
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    #13 · NSF/ANSI 58 certified 7-stage 75 GPD alkaline and UV under-sink RO
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    #14 · NSF/ANSI 58 certified 6-stage 75 GPD UV under-sink RO
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    #15 · NSF/ANSI 58 certified 5-stage 75 GPD under-sink RO
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    2.1/10
    #16 · 6-stage 90 GPD alkaline under-sink RO with a named WQA contaminant list
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    2.0/10
    #17 · 5-stage 90 GPD under-sink RO with a named WQA contaminant list
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    #18 · 450 GPD alkaline dual-flow under-sink RO with a 2:1 pure-to-drain ratio
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    #19 · 1,200 GPD dual-flow tankless RO with a 3:1 pure-to-drain ratio
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    #20 · 8-stage 700 GPD alkaline tankless RO
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    #21 · 7-stage 700 GPD tankless RO with a 2:1 pure-to-drain ratio
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    #22 · 9-stage 450 GPD remineralizing under-sink RO with a 2:1 pure-to-drain ratio
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    #23 · 6-stage 600 GPD tankless RO with a 1.5:1 pure-to-drain ratio
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    #24 · 7-stage 500 GPD tankless RO
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    #25 · 800 GPD tankless RO with an up-to 2.5:1 pure-to-drain ratio
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    #26 · 600 GPD tankless RO with a 2.5:1 pure-to-drain ratio
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    #27 · 3-stage 600 GPD tankless under-sink RO
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    #28 · 600 GPD all-in-one tankless under-sink RO
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    #30 · 500 GPD alkaline tankless RO with UV and a 2:1 pure-to-drain ratio
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    #31 · 7-stage 100 GPD alkaline under-sink RO with a booster pump and UV
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    #32 · 6-stage 200 GPD alkaline under-sink RO
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    #33 · 7-stage 75 GPD alkaline and UV under-sink RO
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    #34 · 6-stage 100 GPD alkaline under-sink RO
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    #35 · 5-stage 200 GPD under-sink RO
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    #37 · 6-stage 75 GPD UV under-sink RO with a stainless housing
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    #38 · 6-stage 100 GPD under-sink RO with a booster pump and UV
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    #39 · 5-stage 100 GPD countertop RO with UV and a 2.5:1 pure-to-drain ratio
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    #40 · 5-stage 100 GPD under-sink RO
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    #41 · 5-stage 90 GPD fast-flow under-sink RO
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    #42 · 5-stage 90 GPD under-sink RO with a permeate pump for low-pressure homes
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    #43 · 5-stage 100 GPD under-sink RO
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    #44 · 5-stage 100 GPD under-sink RO with a booster pump
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    #45 · 5-stage 50 GPD under-sink RO with a 4-gallon tank
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    #46 · 5-stage 75 GPD under-sink RO with a booster pump
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    #47 · Portable 4-stage 90 GPD countertop RO with a carry case
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    #48 · Portable 4-stage 90 GPD alkaline countertop RO
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    #49 · Compact 4-stage 90 GPD under-sink RO
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    #50 · Tankless under-sink RO with a 3:1 pure-to-drain ratio and 0.69 GPM listed flow