Express Water RO5DX
#6 in With tankFull review
For a budget buyer who wants a certified system with cheap filters. Anyone paying for water or on a septic system should pick a lower waste design.
Amazon $179.99$179.99
3 Express Water products ranked. Each one is scored and ranked against every brand in its type, so "#3 mid-size" means third of all mid-size RO systems here, not third among Express Water's own.
Express Water makes 2 current RO systems: 2 with tank. Prices run from $179.99 for the Express Water RO5DX to $199.99 for the Express Water ROALK10MBN. Its best-rated model: the Express Water RO5DX (#6 of 14 with tank, rated 3.6).
The Express Water Essential Pro WH300SCGS-S is Express Water's only current whole-house water filter here, ranked #10 of 13 cartridge and rated 2.6.
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Express Water RO systems 2
- Express Water RO5DX#6 with tankFull review
For a budget buyer who wants a certified system with cheap filters. Anyone paying for water or on a septic system should pick a lower waste design.
Amazon $179.99$179.9950 gpd-$81 a year - Express Water ROALK10MBN#9 with tankFull review
For a buyer who wants mineralized water at a low price. The RO5DX is the safer pick if certification matters.
Amazon $199.99$199.99100 gpd-$143 a year
Every under-sink reverse osmosis system ranked
Express Water whole-house filters 1
- Express Water Essential Pro WH300SCGS-S#10 cartridgeFull review
A tidy, frame mounted three stage system for city water with some grit. Its certification claim is vague.
Amazon $469.99$469.99$0.96 per 1,000 gal15 gpm100,000 gal
