Waterdrop G2 Reverse Osmosis System Review
Product Overview
If you’re considering upgrading your home’s water filtration, the Waterdrop G2 Reverse Osmosis System might just be the perfect match. This advanced 7-stage tankless system is designed to fit neatly under your sink while delivering purified water fast and efficiently. With its technology-certified filtration, it reduces harmful contaminants including TDS, PFAS, and vinyl chloride, helping you enjoy clean, safe drinking water every day. The innovative design also cuts down on water waste with a low 1:1 pure-to-drain ratio, making it an eco-friendly choice.

Waterdrop G2 Reverse Osmosis System
Key Takeaways
- NSF/ANSI 372 certified, ensuring lead-free parts and top filtration quality.
- 7-stage filtration system effectively reduces TDS, PFAS, PFOA, and other common water contaminants.
- Tankless design saves under-sink space and cuts noise while offering a fast 400 GPD flow rate.
- Requires under-sink electricity and drilling for installation, which might be a consideration.
- Includes two filters in the package for easy maintenance.
Why You Might Need the Waterdrop G2 RO System
If your tap water concerns you, especially regarding taste, odor, or contaminants, this system could be the solution you are looking for. You might be aiming to reduce harmful compounds like lead, PFAS, or chlorine. Maybe you want water on demand without the bulky storage tank found in traditional RO systems to save kitchen space. Alternatively, you could be looking for a system that reduces water waste compared to older models. The Waterdrop G2 meets all those needs with modern design and efficient performance, perfect for households wanting reliable, fresh-tasting water right from the sink.
First Impressions: What to Expect
When you first unpack the Waterdrop G2 system, you’ll notice its sleek, compact design that’s meant to fit under most kitchen sinks without crowding the space. The kit comes with all essential connections, including two high-quality filters that promise to keep your water pure for months. Installation may require drilling and plugging into an outlet, but the process is streamlined to take under 30 minutes if you’re comfortable with basic DIY plumbing. The build feels solid, with a modern, integrated electrical and water circuit to reduce leaks and noise—a nod to thoughtful engineering.
Specs at a Glance
Feature | Detail |
---|---|
Filtration Stages | 7-stage composite filtration |
Water Production Rate | Up to 400 gallons per day (GPD) |
Pure to Drain Ratio | 1:1 (low water waste) |
Design | Tankless, under-sink |
Certification | NSF/ANSI 372 (lead-free materials) |
Noise Level | Low due to airtight housing |
Installation | Requires outlet & hole drilling |
Replacement Filters | Search model WD-G2-W |
Included Filters | Two filters included |

Waterdrop G2 Detailed Components
Design & Build Quality
Waterdrop really focused on making the G2 both compact and efficient. Its tankless design not only saves over 70% of under-sink space compared to traditional systems but also ensures fresher water since it’s not stored in a tank but filtered on demand. The advanced integration of electrical and water circuits minimizes the chances of leaks and reduces noise—a big plus for quiet kitchens. The outer housing keeps noise down further and looks sleek under your sink.
One customer review highlights, “Installation was straightforward, and replacing filters is a breeze thanks to the twist-and-pull design—takes just seconds.” This shows Waterdrop’s attention to user-friendly maintenance. The included filter set makes it easy to keep your system running smoothly without fuss, and the filtration materials surpass NSF standards for lead-free safety.

Tankless Under-Sink Design
Real-World Performance
This system performs strongly in everyday use. It can deliver up to 400 gallons of purified water per day, which means you never have to wait long for fresh drinking water. Filling a glass takes about 12 seconds—a significant improvement compared to many competitor models. One user noted how the flow rate remains steady even when multiple taps are running elsewhere in the house. The 1:1 pure-to-drain ratio is another standout feature, cutting water waste by 300% compared to older RO systems.
Since it’s tankless, you’re always getting freshly filtered water without the risk of stale storage. Plus, the 7-stage filtration effectively removes a wide range of contaminants that affect taste, safety, and odor. For families with concerns about tap water purity, this system offers peace of mind. Installation was reported to be straightforward with clear instructions.

Fast and Consistent Water Flow
What Makes It Stand Out?
Compared to traditional reverse osmosis systems like APEC ROES-50 and iSpring RCC7AK, the Waterdrop G2 stands out in several ways. First, the tankless design is a major innovation. Most RO systems include a bulky storage tank that takes up space and can harbor bacteria if not maintained properly. Waterdrop solves this with on-demand filtration, streamlined for fresh taste and maximum hygiene.
Secondly, the flow rate of 400 GPD is higher than many models in its class, meaning you get filtered water faster without waiting. The 1:1 pure-to-drain ratio is also a game changer—typical RO systems waste much more water, sometimes at a 3:1 ratio or worse. This system balances efficiency and environmental responsibility.
Finally, the NSF/ANSI 372 certification ensures lead-free materials and safe use, a crucial factor that can be overlooked in other systems. The easily replaceable filters and reduced noise add to a better user experience. While some models are purely mechanical, Waterdrop integrates electronic components intelligently to deliver both speed and filtration quality.
Strengths vs. Trade-Offs
Strengths ✅ | Trade-Offs ❌ |
---|---|
7-stage composite filtration removes a wide range of contaminants | Requires electrical outlet and drilling for installation |
NSF/ANSI 372 certified for safe, lead-free materials | Filter replacement cost over time (filters needed every 6-12 months) |
High flow rate of up to 400 GPD delivers water quickly | Tankless design means no water storage—depends on continuous power |
Low 1:1 pure-to-drain ratio saves water compared to traditional RO systems | Initial setup may require plumbing skills or professional help |
Compact, tankless design frees up under-sink space | Needs electrical power under the sink—consider outlet placement |
Twist-and-pull filter design is fast and easy to replace | Not portable; fixed installation only |

Strengths and Trade-Offs
Who Is It For?
The Waterdrop G2 RO System is ideal if you are:
- A homeowner wanting clean, safe drinking water without compromising under-sink space or aesthetics.
- A family eager to reduce exposure to contaminants like lead, PFAS, and other harmful chemicals common in tap water.
- A person concerned about water waste and environmental impact, seeking a reverse osmosis system that minimizes waste.
- Someone comfortable with minor installation steps involving power access and plumbing or willing to hire a professional for a quick setup.
This system suits anyone putting water quality and efficiency at the forefront of their kitchen upgrade. It’s perfect for households where bottled water use is high or tap water quality is uncertain. Also, if you want a more modern, quieter filtration system that saves storage space, this RO unit checks those boxes.
Expert Advice to Maximize Results
To get the best from your Waterdrop G2 system:
- Ensure you install it near a dedicated electrical outlet for uninterrupted power.
- Regularly replace filters using the WD-G2-W model as recommended to maintain peak filtration.
- Run water through the system a few minutes after installation or filter changes to flush out any impurities.
- Use a TDS meter periodically to monitor water purity and know when filters need replacing.
- Keep the unit and surrounding area dry and clean to avoid any mechanical or electrical issues.
- If you live in an area with hard water, consider pre-treatments or softening alongside this RO unit for longer membrane life.

Waterdrop G2 Installation & Maintenance Tips
FAQ
Q1: What contaminants does the Waterdrop G2 system remove?
A1: It effectively removes total dissolved solids (TDS), PFAS, PFOA, PFOS, lead, vinyl chloride, monobutyl ether, and other harmful chemicals using a 7-stage filtration process including reverse osmosis membrane technology.
Q2: How fast is the water output?
A2: The system produces up to 400 gallons per day, delivering around a cup of purified water in about 12 seconds, faster than many standard RO systems.
Q3: Does this system require electricity?
A3: Yes, it uses under-sink electrical power to operate its integrated circuits and maintain a steady water flow, so it must be installed near an outlet.
Q4: Is the system noisy during operation?
A4: The airtight housing and design reduce noise significantly, making it quieter than many other reverse osmosis units.
Q5: How difficult is installation?
A5: Installation involves some plumbing and electrical work, including drilling holes under the sink. The process is designed to be manageable within 30 minutes with proper tools and skills.
Q6: How often do the filters need to be replaced?
A6: Filters typically need changing every 6-12 months depending on usage and water quality. The twist-and-pull design makes filter swaps quick and hassle-free.
Q7: Does the system store filtered water?
A7: No, the Waterdrop G2 has a tankless design, filtering water on demand to ensure freshness and save storage space.
Verdict
The Waterdrop G2 Reverse Osmosis System is a thoughtful blend of cutting-edge filtration technology and smart design. With its fast flow rate, compact tankless form, and NSF-certified materials, it delivers clean and safe drinking water while saving space and reducing waste. If you value efficient filtration and sleek installation under your sink, this system offers a compelling upgrade.
