Waterdrop X12 Alkaline Reverse Osmosis System 1200 GPD
- 1200 GPD tankless reverse osmosis, under sink
- 11-stage filtration with a 0.0001 μm RO membrane
- 3:1 pure to drain ratio
- NSF/ANSI 42, 58 and 372 certified by IAPMO R&T
- 24-month RO filter life
- 1000 ppm TDS max supported supply water
- Smart faucet shows TDS and filter life, set-volume output
- Alkaline mineral stage adds Ca and Mg
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A fast tankless under-sink RO system with alkaline remineralization and a faucet that reports water quality, aimed at families. It needs power under the sink, and the mineral filter nudges the TDS reading up, so a higher faucet number is expected.
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ASIN: B0C7GFMP8ZModel: X12Category: Undersink & Countertop Water Filters
Overview
Not a tank-based RO kit that stores water in a pressure tank, the Waterdrop X12 is a tankless under-sink system that filters on demand and adds minerals back to the output. A smart digital faucet shows TDS and filter life and can dispense a set volume.
Speed and space are why to choose the X12: the tankless body frees cabinet room and serves water with no waiting. It needs a power outlet under the sink, and its alkaline stage raises dissolved solids slightly, so the faucet readout will not show the lowest possible number.
Who it's for
Households drinking and cooking with a lot of filtered water, and with power available in the sink cabinet, get the most from this setup. Renters who cannot modify the sink, and anyone chasing the lowest TDS reading, should choose differently.
Pros and cons
- Tankless design frees under-sink space
- Faucet displays TDS and filter life
- Dispenses a preset volume on demand
- Adds calcium and magnesium back
- Needs a power outlet under the sink
- F1A filter can raise TDS slightly
- Warranty terms not listed
- Accessories only described as other accessories
Performance notes
Output speed comes from an electrically powered tankless design that pushes tap water through the membrane on demand, with no tank to refill. Purity is set by the multilayer RO membrane, then the alkaline stage adds minerals back, which is why the faucet TDS reading rises a little after it. Supply water above the rated dissolved solids level or very cold inlet water falls outside its listed range.
Specifications
| Brand | Waterdrop |
|---|---|
| Model | X12 |
| Dimensions & fit | |
| Item Dimensions L X W X H | 18.2 × 6.2 × 16.7 inches |
| Capacity & performance | |
| Capacity | 1200 gallons |
| Maximum Flow Rate | 0.4 gpm |
| Filter Life Cycle | 24 months |
| Lowertemperature Range | 41 °F |
| Upper Temperature Rating | 100 °F |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Material Type | Activated carbon & Alkaline mineral, Pre-sediment and carbon block, Reverse osmosis membrane |
| Compatibility & installation | |
| Installation Type | Under-Sink |
| Included components | |
| Unit Count | 1 |
| Included Components | X12-Alkaline RO System, F1A Filter, F2 Filter, X12-F3 Filter, Other Accessories |
| Warranty & support | |
| Supported Water Tds Level Maximum Ppm | 1000 |
| Other details | |
| Purification Method | Reverse Osmosis |
| Container Type | Dispenser |
| Number Of Items | 1 |
| Other Special Features Of The Product | Tankless |
| Part Number | C-WD-X12 |
| Item Highlight | NSF/ANSI 42&58&372 Certified, 11-Stage Filtration, Tankless RO Water Filtration System, 3:1 Pure To Drain Silver Smart Faucet |
| Manufacture Year | 2022 |
Frequently asked questions
What comes in the box with the Waterdrop X12?
The listing names the X12-Alkaline RO system, the F1A, F2 and X12-F3 filters, and other accessories. The accessories are not itemized, so confirm the fittings match your plumbing before install day.
Why does the TDS reading on the Waterdrop X12 faucet seem higher after a filter change?
Waterdrop notes that the F1A replacement filter contains an alkaline mineralization filter and may cause a slight increase in TDS. That rise comes from the added minerals.
Is the Waterdrop X12 a countertop filter?
No. The system installs under the sink and dispenses through its own smart digital faucet.
Can I set how much water the Waterdrop X12 faucet pours?
Yes. The smart digital faucet supports quantitative water output, so you can dispense a set amount.