US
Waterdrop

Waterdrop X16-BAS Alkaline Reverse Osmosis System 1600 GPD

  • 1600 GPD peak flow, tankless, fills a 6 oz cup in 2 seconds
  • 3:1 pure-to-drain ratio for lower wastewater
  • 11-stage filtration with a 0.0001 μm RO membrane of 18 layers
  • NSF/ANSI 42, 58 and 372 certified by IAPMO R&T
  • Alkaline mineral stage after the membrane, may raise TDS slightly
  • Smart faucet with real-time TDS, filter life and volume control
  • Countertop drilling required to fit the faucet
  • 18.2 x 6.25 x 16.72 in unit, 17.76 kg

Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A strong under-sink choice for a kitchen that wants fast tankless reverse osmosis water with minerals added back. The faucet needs a hole drilled in the countertop, so plan for that first.

As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.

ASIN: B0DX244R2NModel: X16-BASCategory: Undersink & Countertop Water Filters

Overview

A family that wants filtered water on tap without a storage tank gets a reverse osmosis unit that mounts under the sink and feeds its own smart faucet. Water runs through sediment, carbon, membrane and alkaline mineral stages, and the faucet shows water quality and filter life.

Fast on-demand flow and a faucet that reports water quality make the Waterdrop easy to live with day to day. Wastewater stays low for a reverse osmosis unit thanks to its efficient drain ratio. Expect a slightly higher TDS reading from the mineral stage, and expect to drill the countertop.

Who it's for

Kitchens with cabinet room under the sink and a countertop that can take a new faucet hole get the most from it. Renters and people who want water with no minerals at all should look elsewhere, since the mineral stage nudges TDS upward.

Pros and cons

Pros
  • Tankless design saves cabinet space
  • Fast on-demand flow at the faucet
  • Low wastewater drain ratio
  • Real-time TDS and filter life display
Cons
  • Faucet install requires drilling the countertop
  • Mineral filter may raise TDS slightly
  • Heavy unit to lift into a cabinet
  • Power requirement not listed

Performance notes

Flow comes from the tankless design pushing water through the membrane on demand, so output depends on membrane and filter condition rather than a stored reserve. The fine membrane does the contaminant reduction, while the mineral stage adds minerals back afterward. The faucet readout of TDS and filter life shows when a stage starts to fall behind.

Specifications

BrandWaterdrop
ModelX16-BAS
Dimensions & fit
Item Weight39.15 pounds
Item Dimensions L X W X H18.2 × 6.2 × 16.7 inches
Capacity & performance
Capacity1600 gallons
Construction & materials
Material TypeActivated carbon & Alkaline mineral, Pre-sediment and carbon block, Reverse osmosis membrane
Compatibility & installation
Installation TypeUnder-Sink
Included components
Included ComponentsX16 RO System, F2 Filter, F1A Filter, X16-F3 Filter, Stainless Steel Faucet
Other details
Purification MethodReverse Osmosis
Container TypeDispenser
Number Of Items1
Other Special Features Of The ProductTankless
Part NumberWD-X16-BAS
Item HighlightNSF/ANSI 42 & 58 & 372 Certified, 11-Stage Under Sink Water Filter System, Tankless RO, 3:1 Pure-To-Drain Ratio, Smart Faucet

Frequently asked questions

Does the Waterdrop X16 need holes drilled to install?

Yes. The listing says faucet installation requires drilling holes in the countertop. The tankless body itself mounts under the sink and the brand says the design simplifies installation.

Why does my TDS reading go up after changing the Waterdrop F1A filter?

The F1A contains an alkaline mineralization filter, and the listing warns it may cause a slight increase in TDS. That rise comes from added minerals, not from the membrane failing.

What comes in the box with the Waterdrop X16?

The X16 RO system, the F2, F1A and X16-F3 filters, and a stainless steel faucet.

Does the Waterdrop X16 use a storage tank?

No. It is a tankless reverse osmosis system that filters on demand, which saves space under the sink.

What does the Waterdrop X16 reduce?

Per SGS testing listed by the brand, it reduces TDS, PFOA, PFOS, chlorine, fluoride, arsenic and lead, among others.