Express WaterROALK10 Alkaline Reverse Osmosis System
Adds a mineral cartridge after the membrane to put back what reverse osmosis removes.
$233
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Usability
Usability
This is the right pick for someone who dislikes the flat taste of straight RO water and will accept a twenty-six dollar premium and one more cartridge to fix it. The remineralisation stage does what it claims and makes a measurable difference to mouthfeel, and independent testing of the sibling RO5DX recorded a final-stage pH of 9.0. The weakness is consistency: Reddit users report that mineral output drifts downward across the cartridge life, so the water you get in month six is not the water you got in week one, and Express Water publishes no output range to plan against. The system holds no NSF listing, so the alkaline claim and the contaminant list both rest on the manufacturer's own data. A buyer here is paying for taste, not for a health claim, and should treat it that way.
- Remineralisation cartridge restores calcium, magnesium and potassium after the membrane
- Independent testing of the same stage on a sibling model recorded pH 9.0
- Standard 10 inch cartridges, no proprietary sizes
- Leak-detection pad and clear first-stage housing included
- Same footprint as the non-alkaline system, so no extra cabinet cost
- No NSF listing - the alkaline and contaminant claims rest entirely on Express Water's own data
- Mineral output is reported to fall off across cartridge life and no output range is published
- One additional cartridge to buy and change every six months
- One-year warranty
- 50-100 GPD production is slow against tankless systems at similar money
- Discharges one to three gallons per gallon produced
The ROALK10 adds an Active Mineral Technology remineralisation cartridge after the membrane, returning calcium, magnesium and potassium to water that reverse osmosis has stripped. The base platform is unchanged from the RO10: five filtration stages, a 50-100 GPD membrane, a 4-gallon tank holding about 3.2 gallons usable, and a 0.8 GPM faucet. This listing is the modern chrome faucet; brushed nickel and deluxe finishes are the same system.
Additional information
Specification: Express Water ROALK10 Alkaline Reverse Osmosis System
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Questions answered from our data
How much does a reverse osmosis system cost?The 69 reverse osmosis systems we list run from $165 to $3,779, with a median of $367.
How long do reverse osmosis filters last?Of the 69 reverse osmosis systems we list, 64 state a filter life; the most common is 6-12 months (62).
Does reverse osmosis remove fluoride?63 of the 76 reverse osmosis systems we list claim to reduce fluoride.
Do water filters remove lead?120 of the 296 systems we list claim to reduce lead.
