---
product_id: 188180028
title: "Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech"
brand: "waterdrop"
price: "€ 539.68"
currency: EUR
in_stock: true
reviews_count: 13
category: "Waterdrop"
url: https://www.desertcart.it/products/188180028-waterdrop-g2-reverse-osmosis-system-7-stage-tankless-ro-water
store_origin: IT
region: Italy
---

# 400 GPD ultra-fast flow 7-stage advanced filtration Tankless compact design Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech

**Brand:** waterdrop
**Price:** € 539.68
**Availability:** ✅ In Stock

## Summary

> 💧 Drink Smart, Live Pure — The Future of Water Filtration is Here!

## Quick Answers

- **What is this?** Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech by waterdrop
- **How much does it cost?** € 539.68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/188180028-waterdrop-g2-reverse-osmosis-system-7-stage-tankless-ro-water)

## Best For

- waterdrop enthusiasts

## Why This Product

- Trusted waterdrop brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Pure Water, Zero Wait:** Get crystal-clear water in just 12 seconds with a rapid 400 gallons per day flow rate.
- • **7-Stage Filtration Power:** NSF/ANSI 372 certified system removes lead, PFAS, TDS & more for premium purity.
- • **Eco-Friendly 1:1 Efficiency:** Save water with an industry-leading pure-to-drain ratio that cuts waste by 300%.
- • **Effortless DIY Installation:** Integrated design and twist-pull filters make setup and replacements a breeze in under 30 minutes.
- • **Space-Saving Tankless Design:** Reclaim 70% more under-sink space with a sleek, tankless unit that fits your modern kitchen.

## Overview

The Waterdrop G2 Reverse Osmosis System is a cutting-edge, NSF/ANSI 372 certified 7-stage tankless water filter delivering up to 400 gallons per day with a highly efficient 1:1 pure-to-drain ratio. Designed for under-sink installation, it offers rapid filtration, space-saving innovation, and easy maintenance, ensuring professional-grade water purity with minimal waste and maximum convenience.

## Description

Product description Tankless Reverse Osmosis System Waterdrop Tankless RO Tankless Design Satisfy Your More Water Demands Enjoy Natural Mineral Water At Home Search "Waterdrop Remineralization Filter" to enjoy mineral water with our tankless reverse osmosis system at Home. Connect To Refrigerator and Ice Maker If you need to connect RO system to a refrigerator and ice maker, we recommend you to purchase our PMT pressure tank. Waterdrop Reverse Osmosis System WD-T3-T Mineral RO WD-G5P500 RO System WD-X8 Alkaline RO System WD-K6 Instant 𝐇𝐨𝐭 RO WD-G3P600 RO System WD-M6H Instant 𝐇𝐨𝐭 RO WD-A2 𝐇𝐨𝐭&𝐂𝐨𝐥𝐝 RO

Review: Quality Product that Performs - I don't normally take time to do product reviews. This product has inspired me. I have had it installed for a little more than a month, and so far, it performs as described. The water is clear, clean and great! I even split the output line and ran it to my refrigerator. The almost clear ice and cold water from my dispenser is a great blessing and it gets used a lot. The installation is easy as promised. I seldom have DIY projects that I don't have to run to the hardware store one or more times. Everything that you need comes in the package and the instructions are sufficient for a reasonably handy person. The one real difficulty is mounting the provided faucet. Making the hole in your counter or sink is installation dependent. I already had a hole from a previous RO product. I had difficulty tightening the nut to secure the faucet. My mounting hole is positioned between the wall and the back of the kitchen sink. I would recommend a basin wrench if you have on available. The price of the replacement cartridges is a little high...about $140 for a 2 year period of operation. But, if the unit continues to perform, I would say that it is very much worth it. I particularly like the 1:1 efficiency of the RO. My previous unit was a terrible waste of water and made an annoying noise when it was back flushing itself. I will probably follow this review up with another when it comes time to change the first cartridge in a year.
Review: H2O expert impressed - I owned a successful marine aquarium service company for 15+ years and have been a reef tank hobbiest for more than 30 years. I know a lot about water quality, both for my reef tank water changes, and for my daily drinking water. I manufacture my aquarium water using RODI technology (reverse osmosis deionization), the only practical method for producing lab grade water with 0.0 TDS (Total Dissolved Solids). This takes constant digital testing of both my input city water and the output water after my filter. I am sure I have bored you to sleep but please WAKE Up. (In case you wonder why I don't simply drink the water from my RODI filter, one would need to add minerals back to it first before it would be safe to consume on any type of regular basis.) Now you know why I wanted a separate, dedicated Reverse Osmosis drinking water system for my family. After I Installed the Waterdrop Tankless Reverse Osmosis unit, (a very straight forward task that honestly should take the average person about 1/3rd the time of an old technology RO filter with pressurized water tank for drinking water), I was shocked to test the output water at the included metal faucet at a low TDS of just 3 PPM. My city water entering the Tankless system is currently at 140ppm. The fact that the Waterdrop system improves the water quality to only 3ppm without the use of dionization is AMAZING. Also, I turn on the filter and immediately test the water, thus there is no wait time required to let the water run before it is ready to drink. I have had my Tankless system running for months and it is rock solid at 3ppm. It is clean, delicious drinking water from an attractive, compact unit. I could not be more pleased. I also want to speak to the customer service I experienced. Unfortunately, after about 2 months of use, the 400GPD system would not turn on. I was really surprised when this occurred and emailed Waterdrop support without delay. Although I was well past the desertcart 30 day return period, the representative clearly cared about customer satisfaction and shipped me out a new, complete upgraded 600 GPD unit and a return postage paid shipping label for my original 400 GPD unit. He also sent me a free extra filter cartridge for the inconvenience I had experienced. I have had this replacement unit running for months without any issues. I would give Waterdrop 10 stars if it was allowed. Thanks for reading my lengthy, but honest review. Please buy a Waterdrop Tankless Reverse Osmosis filter, you will not be sorry you did!

## Features

- [NSF/ANSI 372 Certified] 400 GPD & 1:1 low drain ratio & Tankless Design & Easy installation. Two filters are included in the package. Search "Waterdrop G2CF" and ''Waterdrop G2MRO' for replacement filters
- [7 Stage Filtration & effective filtration] The G2 system is certified by NSF/ANSI 372 for lead-free materials. The G2 RO System adopts a composite filter result in more effective filtration. Our RO system can reduce TDS, PFAS, PFOA, PFOS, vinyl chloride, monobutyl ether, according to reverse osmosis membrane technical manual
- [400 GPD & 1:1 pure to drain ratio] The Waterdrop G2 reverse osmosis system offers a fast water flow rate of up to 400 GPD. Get a cup of filtered water in about 12 seconds, satisfying your needs while saving time. Compared to the ordinary RO system, the Waterdrop RO system always has a stable water flow. This tankless RO has a low drain ratio of 1:1 and saves water waste by 300%
- [Innovative tankless design] The tankless design ensures the safety of your family’s drinking water. It also saves over 70% more under-sink storage space than does the ordinary RO system. Note that this reverse osmosis system requires under-sink electricity
- [Integrated product design] The advanced integrated design of the electrical and water circuits reduces leakage. The airtight housing reduces noise, while the process of installing and replacing the filter is faster and more convenient than with other filters. Due to the filters’ twist-and-pull design, you can replace them in 3 seconds. The installation of the RO System takes less than 30 minutes. NOTE: An electrical outlet and drilling holes is required to operate it

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B082CZ9XZ9 |
| Best Sellers Rank | #7,117 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Under-Sink & Countertop Filtration |
| Brand | Waterdrop |
| Brand Name | Waterdrop |
| Capacity | 400 Gallons |
| Container Type | Cartridge |
| Customer Reviews | 4.5 out of 5 stars 2,052 Reviews |
| Included Components | G2 RO System, Replacement Filters, Faucet, User Manual |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 17.3"L x 5.9"W x 14"H |
| Item Weight | 25 Pounds |
| LowerTemperature Range | 41 Degrees Fahrenheit |
| Manufacturer | Waterdrop |
| Material | 1.System cover: plastic 2.Faucet: metal 3.MRO filter: reverse osmosis membrane & carbon block & pp cotton 4.CF filter: pp cotton & carbon block Material 1.System cover: plastic 2.Faucet: metal 3.MRO filter: reverse osmosis membrane & carbon block & pp cotton 4.CF filter: pp cotton & carbon block See more |
| Material Type | 1.System cover: plastic 2.Faucet: metal 3.MRO filter: reverse osmosis membrane & carbon block & pp cotton 4.CF filter: pp cotton & carbon block |
| Maximum Flow Rate | 0.28 Gallons Per Minute |
| Model Name | WD-G2-W |
| Model Number | WD-G2-W |
| Other Special Features of the Product | Tankless |
| Part Number | WD-G2-W |
| Power Source | In-built Stored Cord |
| Product Dimensions | 17.3"L x 5.9"W x 14"H |
| Purification Method | Reverse Osmosis |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Feature | Tankless |
| Supported Water TDS Level Maximum (PPM) | 300 |
| UPC | 840814169582 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 100 Degrees Fahrenheit |
| Warranty Description | 1 year manufacturer and Seller Combination |

## Product Details

- **Brand:** Waterdrop
- **Capacity:** 400 Gallons
- **Included Components:** RO system, MRO、CF filter, Faucet, PE pipes *3, T-fitting, Drain Saddle
- **Installation Type:** Under Sink
- **Package Information:** Cartridge
- **Power Source:** In-built Stored Cord
- **Product Dimensions:** 17.33"L x 5.91"W x 13.98"H
- **Purification Method:** Reverse Osmosis
- **Special Feature:** Tankless

## Images

![Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech - Image 1](https://m.media-amazon.com/images/I/61o5z6FqtPL.jpg)
![Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech - Image 2](https://m.media-amazon.com/images/I/61ol58Lhq2L.jpg)
![Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech - Image 3](https://m.media-amazon.com/images/I/71Kn-8cFljL.jpg)
![Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech - Image 4](https://m.media-amazon.com/images/I/71J+lpZ7ukL.jpg)
![Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech - Image 5](https://m.media-amazon.com/images/I/71a90tb8mXL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: How is this different than the wd-g3-w?**
A: Dear Customer,

Thank you very much for reaching out to us.
Both G2 and G3 are smart under sink water filtration systems using reverse osmosis technology. Designed for easy installation, both of the models are tankless with the integrated waterway and composite filters. The water flow for G2 and G3 are both 400 GPD, 0.28GPM with the 1:1 drain water ratio.
The G2 model is an economical option compared with G3 in terms of water filtration performance. Here’s some major difference between the two models, which I will elaborate for you from several aspects.
●Filters: G2 has two composite filters with 5-stage filtration; G3 contains three composite filters with 7-stage filtration.
●Filter life:
○G2: one year CF filter, two years RO filter
○G3: six months CF filter, one year CB filter, two years RO filter
●RO faucet:
○G2: no need to plug in the faucet.
○G3: Cable smart faucet with filter life indicator, the faucet has a light loop to indicate filter life in different colors.
●Front panel:
○G2: Filter life indicating display panel.
○G3: Filter life indicating with a real-time TDS reading LED display panel.
●Certificates:
○G2: FCC Approved
○G3: FCC Approved, UL Listed, NSF 58 & NSF 372 Certified, Reddot Design Award
To enhance the user experience, compared with G2, G3 has added some additional features and designs:
●Automatic flushing: the system will be automatically flushing under the following circumstances
○Flush for accumulative working time over 2 hours
○Flush for No Working within 24 hours (Holiday Mode)
○Flush for power restore
●System self-protection
○E01: Water shortage
○E02: Inside water leakage
●Anti-vibration pad: The G3 unit adds rubber anti-vibration pads to increase stability and reduce noises.
In a word, both the G2 and G3 are great filtration systems that can achieve the same filtration performance to effectively removes more than 1,000 contaminants in water. Waterdrop dedicated to identify local and global trends and translate these into meaningful innovations to meet consumer demands. Your satisfaction has always been our top priority, and we here at Waterdrop will strive to bring you the best water purification experience. Please feel free to contact me if you have any other questions, I’m here to help.
Have a good day.

Best regards,
Mia Lauren

**Q: I plan to add an inline remineralizer between the unit and faucet dispenser. Is the tubing 1/4 or 3/8 inches?**
A: Hello,

Thanks for your interest in our Waterdrop WD-G2-B Reverse Osmosis System.
In theory, you can add an inline remineralize filter between the RO system and the faucet dispenser. But if you do that, there may be some risks that will have a negative impact on the RO system. 
Please note the following points when adding an inline remineralize filter:
1. The size of RO filtered water tubing is 1/4", please confirm whether the size of the inline remineralize filter's will match.
2. With the increase of the pH, the filter material will generate more gas which is easy to cause the pressure inside the tube rises, and the following situation arises.
a. if the housing material of the remineralize filter you use is not solid enough, it is easy to explode with the high pressure. 
b. if the gas can not discharge in time, the pressure inside the tube becomes higher, the pressure may reversely entry into the RO system, which causes serious damage to the RO system and affects the normal use of the system. 
c. when you open the faucet, it can not dispense water immediately. Because it has to bleed out the gas inside the tube first.
If you have any questions, please feel free to give us a call between the hours of 8:00 AM-5: 00 PM (PST), Monday through Friday at 1-888-352-3558. We will try our best to help you out. Thank you very much.

Best Regards,
Mia Lauren

**Q: Is this unit remove fluoride from the water?**
A: Hi Kuzma,

Thanks for your interest in our Waterdrop WD-G2-B Reverse Osmosis System.
Our RO system uses reverse osmosis filtration technology with 8 layers of MRO membranes with a pore size of 0.0001um, the system can remove most contaminants including up to 90% of fluoride in water.
If you have any questions, please feel free to give us a call between the hours of 8:00 AM-5: 00 PM (PST), Monday through Friday at 1-888-352-3558. We will try our best to help you out. Thank you very much.

Best Regards,
Mia Lauren

**Q: Would this system filter sodium out of my well water?**
A: Hi,
Thanks for your interest in our Waterdrop G2 RO System.
Yes, as a benefit of the RO membrane (filtration accuracy: 0.0001μm), this product is able to remove the sodium from the source water.

However, compared to municipal tap water, the well water is rich of large particles, which will clog the CF & RO filter easily, and shorten their lifetime significantly.

Therefore, it's recommended to add a pre-filteration system before the RO system, in order to prolong the filters' lifetime.

In addition, the well water may not be able to provide the feed water pressure that the RO system needs. Furthermore, the water pressure will be even lower after the pre-filtration systems.

So it's recommended to confirm that your feed water pressure meets the RO system's requirement, which is 14.5-87 psi.

The customer's satisfaction is always our top concern. If you have any questions, please feel free to give us a call at: 
1-888-352-3558 (8:00 AM - 5:00 PM PST, Mon - Fri).

Kind Regards 
Mia Lauren 
Customer Service Rep

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality Product that Performs
*by D***. on August 8, 2025*

I don't normally take time to do product reviews. This product has inspired me. I have had it installed for a little more than a month, and so far, it performs as described. The water is clear, clean and great! I even split the output line and ran it to my refrigerator. The almost clear ice and cold water from my dispenser is a great blessing and it gets used a lot. The installation is easy as promised. I seldom have DIY projects that I don't have to run to the hardware store one or more times. Everything that you need comes in the package and the instructions are sufficient for a reasonably handy person. The one real difficulty is mounting the provided faucet. Making the hole in your counter or sink is installation dependent. I already had a hole from a previous RO product. I had difficulty tightening the nut to secure the faucet. My mounting hole is positioned between the wall and the back of the kitchen sink. I would recommend a basin wrench if you have on available. The price of the replacement cartridges is a little high...about $140 for a 2 year period of operation. But, if the unit continues to perform, I would say that it is very much worth it. I particularly like the 1:1 efficiency of the RO. My previous unit was a terrible waste of water and made an annoying noise when it was back flushing itself. I will probably follow this review up with another when it comes time to change the first cartridge in a year.

### ⭐⭐⭐⭐⭐ H2O expert impressed
*by M***S on December 24, 2024*

I owned a successful marine aquarium service company for 15+ years and have been a reef tank hobbiest for more than 30 years. I know a lot about water quality, both for my reef tank water changes, and for my daily drinking water. I manufacture my aquarium water using RODI technology (reverse osmosis deionization), the only practical method for producing lab grade water with 0.0 TDS (Total Dissolved Solids). This takes constant digital testing of both my input city water and the output water after my filter. I am sure I have bored you to sleep but please WAKE Up. (In case you wonder why I don't simply drink the water from my RODI filter, one would need to add minerals back to it first before it would be safe to consume on any type of regular basis.) Now you know why I wanted a separate, dedicated Reverse Osmosis drinking water system for my family. After I Installed the Waterdrop Tankless Reverse Osmosis unit, (a very straight forward task that honestly should take the average person about 1/3rd the time of an old technology RO filter with pressurized water tank for drinking water), I was shocked to test the output water at the included metal faucet at a low TDS of just 3 PPM. My city water entering the Tankless system is currently at 140ppm. The fact that the Waterdrop system improves the water quality to only 3ppm without the use of dionization is AMAZING. Also, I turn on the filter and immediately test the water, thus there is no wait time required to let the water run before it is ready to drink. I have had my Tankless system running for months and it is rock solid at 3ppm. It is clean, delicious drinking water from an attractive, compact unit. I could not be more pleased. I also want to speak to the customer service I experienced. Unfortunately, after about 2 months of use, the 400GPD system would not turn on. I was really surprised when this occurred and emailed Waterdrop support without delay. Although I was well past the Amazon 30 day return period, the representative clearly cared about customer satisfaction and shipped me out a new, complete upgraded 600 GPD unit and a return postage paid shipping label for my original 400 GPD unit. He also sent me a free extra filter cartridge for the inconvenience I had experienced. I have had this replacement unit running for months without any issues. I would give Waterdrop 10 stars if it was allowed. Thanks for reading my lengthy, but honest review. Please buy a Waterdrop Tankless Reverse Osmosis filter, you will not be sorry you did!

### ⭐⭐⭐⭐⭐ Much easier to install and change filters.
*by D***N on April 5, 2026*

I am impressed with the Waterdrop osmosis system. I have replaced several of the older multistage systems over the years for various failures so I decided to try the Waterdrop. There are some significant benefits of the water drop system: 1. Much simpler installation - especially if you are replacing and older osmosis. 2. Takes up less space - this is an on-demand system so no storage tank. This means more room under your sink 3. BIGGEST reason: much easier to replace filters. Although I'm not crazy about a single source of replacement filters, the cost is the same as traditional osmosis filter replacements BUT WAY EASIER. Just twist to remove and replace the filters. There are also indicator lights to tell you when its time to replace them. Finally, my family agrees that this water tastes great - better than the only system I replaced. So its a win.

## Frequently Bought Together

- Waterdrop G2 Reverse Osmosis System, 7 Stage Tankless RO Water Filter System, Under Sink Water Filtration System, 400 GPD, 1:1 Pure to Drain, Reduces TDS, FCC Listed, USA Tech, WD-G2-W
- Waterdrop Remineralization Under Sink Water Filtration, 1/4” Quick Connect Post Filter for RO Reverse Osmosis Filter System, Restore Essential Minerals

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-05-08*