Waterdrop
Waterdrop G3P800 Tankless Reverse Osmosis System
Best high-capacity filtration for large households seeking space-saving water purification.
Experience superior water purification with the Waterdrop G3P800 Tankless Reverse Osmosis System. This certified refurbished unit offers a high-capacity 800 GPD output, perfect for households with high water demands. Its advanced 7-layer RO filtration effectively removes 99.9% of contaminants, ensuring safe and great-tasting water. Enjoy smart features like a TDS monitor and filter life tracker, alongside exceptional water-saving technology. The space-saving tankless design makes installation straightforward and operation convenient.
$849.00
Owner Satisfaction
4.5
/ 5
Category Rank
137
/ 828
#137 in Water Filters
Price vs Category Average
+58%
Above average
Filtration Stages
9
/ -Stages
Who it's for
- Urban dwellers with limited under-sink storage space
- Busy families needing instant access to large volumes of water
- Eco-conscious homeowners prioritizing water conservation and efficiency
Who should skip it
- Budget-focused shoppers seeking an affordable entry-level filtration solution
- Cost-sensitive buyers wary of long-term proprietary maintenance expenses
- Noise-sensitive individuals living in quiet, open-concept home environments
Performance breakdown
Purification Efficiency
Seven-layer filtration effectively strips away nearly all common water contaminants.
Flow Rate
The 800 GPD output delivers rapid water access for busy households.
Space Efficiency
Tankless design eliminates bulky storage tanks to maximize under-sink cabinet space.
Smart Monitoring
Integrated TDS and filter tracking provide real-time data on water quality.
Water Conservation
Advanced technology significantly reduces wastewater compared to traditional reverse osmosis systems.
Installation Complexity
Straightforward setup, though under-sink plumbing work requires basic DIY comfort.
Key Specs
Filtration Stages
9-Stages
Capacity
800 Gallons Per Day (GPD)
Dimensions
17.72 in (Depth) x 18.12 in (Height) x 5.67 in (Width)
Filtration Method
Reverse Osmosis
Filter Material
Reverse Osmosis Membrane & Carbon Block, PP Cotton
Model Number
WD-G3P800-W
Color
White
Installation Type
Under Sink
Features
- High-capacity 800 GPD output
- Advanced 7-layer RO filtration
- Reduces 99.9% of impurities
- Exceptional water-saving technology
- Smart TDS monitor included
- Filter life tracker for convenience
- Tankless design saves space
- Upgraded from popular G3 model
What customers say
Reviewers consistently highlight the Waterdrop G3P800's superior water quality, often equating the taste to premium bottled options. A major advantage is the space saving tankless design, paired with a fast flow rate that eliminates waiting. Users value the smart faucet for providing real time TDS data and filter status, adding significant convenience. The efficient three to one pure water ratio also appeals to environmentally aware consumers. While the initial cost is notable, the overall consensus is that the excellent filtration and long term performance validate the investment. Some users mention minor operational noise and filter replacement expenses.
Know before you buy
Because it lacks a bulky storage tank, this system provides a direct, high-speed flow of 800 gallons per day. You can fill a standard glass of water in seconds, eliminating the wait time typically associated with traditional tank-based reverse osmosis units.
The system features a built-in smart indicator that monitors your water quality and usage in real-time. It will automatically alert you via the faucet light when it is time to replace a specific filter, so you don't have to guess or keep a manual log.
The G3P800 is designed with a slim, compact profile measuring 5.67 inches in width. Its tankless construction significantly reduces the footprint, leaving you with plenty of extra storage space under your sink compared to conventional RO systems.
The system utilizes a comprehensive 7-layer filtration process within its 9-stage setup to remove 99.9% of impurities, including heavy metals, chlorine, and sediment. This ensures your water is not only safer but also tastes significantly cleaner and fresher.
Yes, the integrated TDS monitor continuously measures the total dissolved solids in your water. It provides a real-time reading on the faucet, giving you immediate peace of mind regarding the purity of the water you are drinking.
The tankless design simplifies the installation process by removing the need for a separate storage tank and complex tubing. While it is an under-sink unit, the streamlined setup is generally straightforward for those comfortable with basic plumbing tasks.
Still have a question?
Ask Hayley anything about this product before you decide.