Comparison · under-sink reverse osmosis

Express Water Inc. RO5DX vs GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System

Certified reductions, five-year cost and fit, for two under-sink reverse osmosis systems.

verified 2026-09-21
sources 20

FilterSpecs verdict

how we score
Express Water Inc. RO5DX

— /10

Not scored

GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System $259.99 · $0.28 per gallon

5.9 /10

Not scored

Only GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System holds enough data to score, so this comparison cannot pick a winner on the numbers.

Where they differ

30 of 26 fields

Only the fields where the two systems actually differ. Everything else is identical and sits in the full comparison below.

Table 1 · Differences, plain English
DifferenceExpress Water Inc. RO5DXGE Appliances GXRV40TBN Reverse Osmosis Drinking Water System
Arsenic removalNSF/ANSI 58 Not covered no listing Certified winner
Asbestos (fibers longer than 10 micrometers) removalNSF/ANSI 58 Not covered no listing Certified winner
Bacteria removalNSF P231 Not covered no listing Certified winner
Barium removalNSF/ANSI 58 Not covered no listing Certified winner
Cadmium removalNSF/ANSI 58 Not covered no listing Certified winner
Chromium-3 (trivalent chromium) removalNSF/ANSI 58 Not covered no listing Certified winner
Chromium-6 (hexavalent chromium) removalNSF/ANSI 58 Not covered no listing Certified winner
Copper removalNSF/ANSI 58 Not covered no listing Certified winner
Cysts (Cryptosporidium, Giardia) removalNSF/ANSI 58 Not covered no listing Certified winner
Fluoride removalNSF/ANSI 58 Not covered no listing Certified winner
Free chlorine removalNSF/ANSI 42 Not covered no listing Certified winner
Lead removalNSF/ANSI 58 Not covered no listing Certified winner
Nitrate (as N) removalNSF/ANSI 58 Not covered no listing Certified winner
PFOA removalNSF/ANSI 58 Not covered no listing Certified winner
PFOS removalNSF/ANSI 58 Not covered no listing Certified winner
Pharmaceuticals and emerging contaminants removalNSF/ANSI 401 Not covered no listing Certified winner
Radium 226 and 228 combined removalNSF/ANSI 58 Not covered no listing Certified winner
Selenium removalNSF/ANSI 58 Not covered no listing Certified winner
Taste and odor removalNSF/ANSI 42 Not covered no listing Certified winner
Total dissolved solids removalNSF/ANSI 58 Not covered no listing Certified winner
Turbidity and sediment removalNSF/ANSI 58 Not covered no listing Certified winner
Virus removalNSF P231 Not covered no listing Certified winner
Volatile organic compounds (VOC surrogate claim) removalNSF/ANSI 53 Not covered no listing Certified winner
How much it makes a dayDaily production Not published 12.2 GPD
Adds minerals backRemineralization Not published Yes
Minimum water pressure Not published 40 psi
Maximum water pressure Not published 100 psi
Dimensions Not published 3.625 x 12.5 x 9.25 in
Installation Not published DIY, easy
Warranty, parts Not published 1 yr

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Certified reductions compared

IAPMO R&T · NSF

✓certified a third-party listing exists · ~claimed manufacturer states it, no listing · —not covered no claim made. [1]

Table 2 · Certification status by contaminant
ContaminantExpress Water Inc. RO5DXGE Appliances GXRV40TBN Reverse Osmosis Drinking Water System
Arsenic —Not covered ✓Certified NSF/ANSI 58
Asbestos (fibers longer than 10 micrometers) —Not covered ✓Certified NSF/ANSI 58
Bacteria —Not covered ✓Certified NSF P231
Barium —Not covered ✓Certified NSF/ANSI 58
Cadmium —Not covered ✓Certified NSF/ANSI 58
Chromium-3 (trivalent chromium) —Not covered ✓Certified NSF/ANSI 58
Chromium-6 (hexavalent chromium) —Not covered ✓Certified NSF/ANSI 58
Copper —Not covered ✓Certified NSF/ANSI 58
Cysts (Cryptosporidium, Giardia) —Not covered ✓Certified NSF/ANSI 58
Fluoride —Not covered ✓Certified NSF/ANSI 58
Free chlorine —Not covered ✓Certified NSF/ANSI 42
Lead —Not covered ✓Certified NSF/ANSI 58
Nitrate (as N) —Not covered ✓Certified NSF/ANSI 58
PFOA —Not covered ✓Certified NSF/ANSI 58
PFOS —Not covered ✓Certified NSF/ANSI 58
Pharmaceuticals and emerging contaminants —Not covered ✓Certified NSF/ANSI 401
Radium 226 and 228 combined —Not covered ✓Certified NSF/ANSI 58
Selenium —Not covered ✓Certified NSF/ANSI 58
Taste and odor —Not covered ✓Certified NSF/ANSI 42
Total dissolved solids —Not covered ✓Certified NSF/ANSI 58
Turbidity and sediment —Not covered ✓Certified NSF/ANSI 58
Virus —Not covered ✓Certified NSF P231
Volatile organic compounds (VOC surrogate claim) —Not covered ✓Certified NSF/ANSI 53

Arsenic

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Asbestos (fibers longer than 10 micrometers)

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Bacteria

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF P231

Barium

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Cadmium

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Chromium-3 (trivalent chromium)

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Chromium-6 (hexavalent chromium)

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Copper

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Cysts (Cryptosporidium, Giardia)

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Fluoride

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Free chlorine

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 42

Lead

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Nitrate (as N)

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

PFOA

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

PFOS

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Pharmaceuticals and emerging contaminants

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 401

Radium 226 and 228 combined

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Selenium

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Taste and odor

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 42

Total dissolved solids

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Turbidity and sediment

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 58

Virus

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF P231

Volatile organic compounds (VOC surrogate claim)

Express Water Inc. RO5DX —Not covered
GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System ✓Certified NSF/ANSI 53

Cost of ownership

Table 3 · Five years, 700 gallons a year
CostExpress Water Inc. RO5DXGE Appliances GXRV40TBN Reverse Osmosis Drinking Water System
Purchase priceNot published$259.99
Filters, 5 yearsNot published$971.93
Five-year totalNot published$1231.92
Cost per gallonNot published$0.28

Assumes 700 gallons per year. [2]

Full specification comparison

Capacity and water use
SpecificationExpress Water Inc. RO5DXGE Appliances GXRV40TBN Reverse Osmosis Drinking Water System
TypeUnder-sink reverse osmosisUnder-sink reverse osmosis
Daily productionNot published12.2 GPD
Minimum water pressureNot published40 psi
Maximum water pressureNot published100 psi
Fit and installation
SpecificationExpress Water Inc. RO5DXGE Appliances GXRV40TBN Reverse Osmosis Drinking Water System
DimensionsNot published3.625 x 12.5 x 9.25 in
InstallationNot publishedDIY, easy
Water compatibility and warranty
SpecificationExpress Water Inc. RO5DXGE Appliances GXRV40TBN Reverse Osmosis Drinking Water System
RemineralizationNot publishedYes
Warranty, partsNot published1 yr

Sources

  1. [1] retrieved 2026-09-21
  2. [2] retrieved 2026-09-21
  3. [3] retrieved 2026-09-21
  4. [4] The Home Depot. Model number as listed for Express Water Inc. RO5DX. retrieved 2026-09-23
  5. [5] IAPMO R&T. IAPMO R&T certificate WC-9859, NSF/ANSI 58-2022, GE Appliances. retrieved 2026-09-20
  6. [6] IAPMO R&T. IAPMO R&T certificate WC-11734, NSF/ANSI 53-2022, GE Appliances. retrieved 2026-09-20
  7. [7] IAPMO R&T. IAPMO R&T certificate WC-9892, NSF/ANSI 42-2022, GE Appliances. retrieved 2026-09-20
  8. [8] IAPMO R&T. IAPMO R&T certificate WC-11735, NSF/ANSI 401-2022, GE Appliances. retrieved 2026-09-20
  9. [9] IAPMO R&T. IAPMO R&T certificate WC-13808, NSF Protocol P231-2014, GE Appliances. retrieved 2026-09-20
  10. [10] IAPMO R&T. IAPMO R&T certificate WC-15030, CSA B483.1-2007 (R2017), GE Appliances. retrieved 2026-09-20
  11. [11] NSF International. NSF Official Listing, NSF/ANSI 58, GE Appliances GXRV40TBN. retrieved 2026-09-20
  12. [12] NSF International. NSF Official Listing, NSF/ANSI 42, GE Appliances GXRV40TBN. retrieved 2026-09-20
  13. [13] NSF International. NSF Official Listing, CSA B483.1, GE Appliances GXRV40TBN. retrieved 2026-09-20
  14. [14] GE Appliances. GE Reverse Osmosis 5 Stage Premium Water Filtration System with Faucet, GXRV40TBN. retrieved 2026-09-20
  15. [15] The Home Depot. GE Under Sink 5 Stage Premium Reverse Osmosis Water Filtration System GXRV40TBN. retrieved 2026-09-20
  16. [16] The Home Depot. GE Under Sink 5 Stage Premium Reverse Osmosis Water Filtration System GXRV40TBN, product photograph. retrieved 2026-09-21
  17. [17] The Home Depot. GE Reverse Osmosis Replacement Filter Set FQ18PN. retrieved 2026-09-20
  18. [18] The Home Depot. GE Reverse Osmosis Replacement Membrane FQ18MN. retrieved 2026-09-20
  19. [19] The Home Depot. GE Reverse Osmosis Under Sink Replacement Filter FQ18RT. retrieved 2026-09-20
  20. [20] The Home Depot. Model number as listed for GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System. retrieved 2026-09-23
Express Water Inc. RO5DX$209.99GE Appliances GXRV40TBN Reverse Osmosis Drinking Water System$249.00