Waterdrop G3P600 Tankless Reverse Osmosis System 600 GPD
- 600 gallons per day, tankless, 0.42 gpm max flow
- 2:1 pure to drain ratio
- 8-stage filtration with RO membrane and carbon block
- NSF/ANSI 42, 53, 58 and 372 listed certifications
- 18.12 x 5.67 x 17.72 inch unit, measure the cabinet first
- Needs an under-sink outlet, corded electric
- Smart faucet shows TDS and filter life
- 1 year warranty
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A high-output tankless RO system that saves cabinet space and reports water quality at the faucet. It needs an electrical outlet under the sink and a cabinet roomy enough for the unit.
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ASIN: B07P1XFYJPModel: G3P600Category: Undersink & Countertop Water Filters
Overview
Mounting under the kitchen sink, Waterdrop's tankless reverse osmosis system filters tap water through a membrane and carbon stages on demand, with no storage tank. A dedicated faucet with a display reports filtered water TDS and remaining filter life. Filters swap out without tools or moving the unit.
Going tankless means filtered water comes straight off the membrane with a low share sent to the drain, and the faucet display removes guesswork on filter changes. The unit is large and heavy for a sink cabinet, and it will not run without power under the sink.
Who it's for
Homeowners who drink and cook with a lot of filtered water get on-demand output and a faucet that reports TDS. Renters who cannot add an outlet under the sink should look elsewhere.
Pros and cons
- Tankless design frees cabinet space
- Low drain ratio wastes less water
- Faucet displays TDS and filter life
- Tool-free filter changes
- Requires an electrical outlet under the sink
- Large unit needs a roomy cabinet
- Heavy to lift into place
- Minimum feed pressure not listed
Performance notes
Output depends on feed water being pushed across the membrane, so household pressure and water temperature govern production. The drain ratio sets how much water goes to waste for each cup produced. With no tank, every glass is filtered as it is drawn, so faucet flow reflects the system's real-time rate.
Specifications
| Brand | Waterdrop |
|---|---|
| Model | G3P600 |
| Dimensions & fit | |
| Item Weight | 31 pounds |
| Item Dimensions L X W X H | 18.1 × 5.7 × 17.7 inches |
| Capacity & performance | |
| Capacity | 600 gallons |
| Maximum Flow Rate | 0.4 gpm |
| Operating Pressure Range | 87 psi |
| Lowertemperature Range | 41 °F |
| Upper Temperature Rating | 100 °F |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Material Type | 1.System cover: plastic 2.Faucet: metal 3.RO filter: reverse osmosis membrane & carbon block & pp cotton 4.CF filter: pp cotton & carbon block |
| Product Shelf Life | 2 years |
| Compatibility & installation | |
| Installation Type | Under-Sink |
| Included components | |
| Unit Count | 1 |
| Included Components | G3P600 RO System (3 Pre-Installed Filters), Smart Display Faucet, User Manual |
| Warranty & support | |
| Warranty Description | 1 year |
| Supported Water Tds Level Maximum Ppm | 1500 |
| Other details | |
| Purification Method | Carbon Block, Reverse Osmosis |
| Container Type | Cartridge |
| Number Of Items | 1 |
| Other Special Features Of The Product | 8-stage Filtration, 600GPD High Capacity, 2:1 Low Drain Ratio, Smart Display Faucet |
| Part Number | WD-G3P600 |
| Item Highlight | NSF/ANSI 42 & 53 & 58 & 372 Certified, 8-Stage RO Water Filtration System Under-Sink, 2:1 Pure To Drain, Smart LED Faucet |
| Item Type Name | Reverse Osmosis Water Filtration System |
Frequently asked questions
Can the Waterdrop G3P600 handle very hard or high-TDS water?
The listing gives a maximum supported feed TDS of 1500 ppm and a lower water temperature limit of 41 F.
What does the Waterdrop G3P600 remove?
Per SGS testing it reduces TDS, chromium, PFAS, radium, fluoride, arsenic salt, iron, calcium, particles, chloride, chlorine and radioactive substances.
How fast does the Waterdrop G3P600 fill a glass?
Waterdrop states it fills an 8 oz cup in 8 seconds.
What comes with the Waterdrop G3P600?
The RO system with 3 pre-installed filters, the smart display faucet and a user manual.
Does the Waterdrop G3P600 have a storage tank?
No. It is tankless and filters water on demand.