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Waterdrop X8

Ranked #5 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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#5

Waterdrop X8

Best for: 9-stage 800 GPD tankless RO, NSF/ANSI 42 and 58 named, 2:1 pure-to-drain

6.1/10

What we like

    Watch out for

      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%
      Daily production800 GPD
      NSF/ANSI 58 namedYes
      Broader named certificationYes
      Drain water per product gallon0.5 gal/gal
      Filtration stages9
      Warranty2 yr
      Daily production (maker)800 gallons per day
      Filtration stages (maker)9 stages
      NSF/ANSI 58 (maker)Official page: NSF/ANSI 42 & 58 & 372 Certified
      Broader named certificationOfficial page names an additional NSF/ANSI standard (for example 42 or 53) or certified reductions beyond TDS
      Drain ratio (maker)2:1 pure-to-drain ratio (official page)
      Drain water per product gallon0.5 gal/gal (computed)
      Warranty (maker)2-year warranty and lifetime technical support (official page)
      Package weight (maker)36.45 pounds
      PriceCheck price
      Check price at Amazon
      Specs source:

      How it compares

      Open the full comparison table

      Waterdrop X16
      7.5/10
      #1 · 11-stage 1,600 GPD tankless RO, NSF/ANSI 42 and 58 named, 3:1 pure-to-drain
      Waterdrop X12
      6.9/10
      #2 · 11-stage 1,200 GPD tankless RO, NSF/ANSI 42 and 58 named, 3:1 pure-to-drain
      Waterdrop X12-PRO
      6.9/10
      #3 · 11-stage 1,200 GPD dual-flow tankless RO, NSF/ANSI 42 and 58 named
      Waterdrop X14
      6.9/10
      #4 · 11-stage 1,400 GPD alkaline tankless RO, NSF/ANSI 42 and 58 named
      Waterdrop X8-PRO
      6.0/10
      #6 · 9-stage 800 GPD dual-flow tankless RO, NSF/ANSI 42 and 58 named
      Waterdrop G3P600
      5.3/10
      #7 · 8-stage 600 GPD tankless RO, NSF/ANSI 42 and 58 named, 2:1 pure-to-drain
      Waterdrop G3P800
      4.1/10
      #8 · 9-stage 800 GPD tankless RO with UV, NSF/ANSI 58 named, 3:1 pure-to-drain
      iSpring RCC7AK
      4.1/10
      #9 · NSF/ANSI 58 certified 6-stage 75 GPD alkaline under-sink RO
      APEC ROTL-A1000ALK
      3.8/10
      #10 · 5-stage 1000 GPD alkaline tankless RO, NSF/ANSI 58 and 372 named in the official title
      APEC ROTL-A1000
      3.6/10
      #11 · 4-stage 1000 GPD tankless RO, NSF/ANSI 58 and 372 named in the official title
      iSpring RO500-BN
      2.8/10
      #12 · NSF/ANSI 58 certified 500 GPD tankless RO with a 2:1 pure-to-drain ratio
      iSpring RCC7AK-UV
      2.6/10
      #13 · NSF/ANSI 58 certified 7-stage 75 GPD alkaline and UV under-sink RO
      iSpring RCC7U
      2.5/10
      #14 · NSF/ANSI 58 certified 6-stage 75 GPD UV under-sink RO
      iSpring RCC7
      2.3/10
      #15 · NSF/ANSI 58 certified 5-stage 75 GPD under-sink RO
      APEC RO-PH90
      2.1/10
      #16 · 6-stage 90 GPD alkaline under-sink RO with a named WQA contaminant list
      APEC RO-90
      2.0/10
      #17 · 5-stage 90 GPD under-sink RO with a named WQA contaminant list
      Waterdrop T4-A
      1.8/10
      #18 · 450 GPD alkaline dual-flow under-sink RO with a 2:1 pure-to-drain ratio
      iSpring RO1200
      1.8/10
      #19 · 1,200 GPD dual-flow tankless RO with a 3:1 pure-to-drain ratio
      Waterdrop G5P700A
      1.8/10
      #20 · 8-stage 700 GPD alkaline tankless RO
      Waterdrop G5P700
      1.7/10
      #21 · 7-stage 700 GPD tankless RO with a 2:1 pure-to-drain ratio
      Waterdrop T3-M
      1.6/10
      #22 · 9-stage 450 GPD remineralizing under-sink RO with a 2:1 pure-to-drain ratio
      Waterdrop D6
      1.5/10
      #23 · 6-stage 600 GPD tankless RO with a 1.5:1 pure-to-drain ratio
      Waterdrop G5P500
      1.3/10
      #24 · 7-stage 500 GPD tankless RO
      iSpring RO800G
      1.2/10
      #25 · 800 GPD tankless RO with an up-to 2.5:1 pure-to-drain ratio
      iSpring RO600-BN
      0.9/10
      #26 · 600 GPD tankless RO with a 2.5:1 pure-to-drain ratio
      APEC ROTL-600
      0.9/10
      #27 · 3-stage 600 GPD tankless under-sink RO
      APEC ROTL-AIO
      0.9/10
      #28 · 600 GPD all-in-one tankless under-sink RO
      iSpring RCC2AK-UV
      0.8/10
      #29 · 7-stage 200 GPD alkaline and UV under-sink RO
      iSpring RO5004F-AK
      0.8/10
      #30 · 500 GPD alkaline tankless RO with UV and a 2:1 pure-to-drain ratio
      iSpring RCC1UP-AK
      0.7/10
      #31 · 7-stage 100 GPD alkaline under-sink RO with a booster pump and UV
      iSpring RCC2AK
      0.7/10
      #32 · 6-stage 200 GPD alkaline under-sink RO
      APEC ROES-PHUV75
      0.6/10
      #33 · 7-stage 75 GPD alkaline and UV under-sink RO
      iSpring PH100
      0.5/10
      #34 · 6-stage 100 GPD alkaline under-sink RO
      iSpring RCC2
      0.5/10
      #35 · 5-stage 200 GPD under-sink RO
      APEC ROES-PH75
      0.5/10
      #36 · 6-stage 75 GPD alkaline under-sink RO
      APEC ROES-UV75-SS
      0.5/10
      #37 · 6-stage 75 GPD UV under-sink RO with a stainless housing
      iSpring RCC1UP
      0.5/10
      #38 · 6-stage 100 GPD under-sink RO with a booster pump and UV
      iSpring RCD100
      0.4/10
      #39 · 5-stage 100 GPD countertop RO with UV and a 2.5:1 pure-to-drain ratio
      iSpring RO100
      0.4/10
      #40 · 5-stage 100 GPD under-sink RO
      APEC RO-Hi
      0.4/10
      #41 · 5-stage 90 GPD fast-flow under-sink RO
      APEC RO-PERM
      0.4/10
      #42 · 5-stage 90 GPD under-sink RO with a permeate pump for low-pressure homes
      APEC ROES-100
      0.4/10
      #43 · 5-stage 100 GPD under-sink RO
      iSpring RCC100P
      0.4/10
      #44 · 5-stage 100 GPD under-sink RO with a booster pump
      APEC ROES-50
      0.3/10
      #45 · 5-stage 50 GPD under-sink RO with a 4-gallon tank
      iSpring RCC7P
      0.3/10
      #46 · 5-stage 75 GPD under-sink RO with a booster pump
      APEC RO-CTOP-C
      0.2/10
      #47 · Portable 4-stage 90 GPD countertop RO with a carry case
      APEC RO-CTOP-PH
      0.2/10
      #48 · Portable 4-stage 90 GPD alkaline countertop RO
      APEC RO-QUICK90
      0.2/10
      #49 · Compact 4-stage 90 GPD under-sink RO
      iSpring RO10001F
      0.0/10
      #50 · Tankless under-sink RO with a 3:1 pure-to-drain ratio and 0.69 GPM listed flow