Waterdrop G3P800 Reverse Osmosis System, 800 GPD Fast Flow, NSF/ANSI 42 & 53 & 58 & 372 Certified, 3:1 Pure to Drain, Tankless Under Sink RO Water Filter System, LED Purifier, Smart Faucet
- Filtration Capacity: 800 Gallons Per Day (GPD)
- Filtration Stages: 10-Stage Advanced Filtration
- Water Efficiency Ratio: 3:1 Pure to Drain
- Certifications: NSF/ANSI 42, 53, 58, & 372 Certified
- Installation Type: Tankless Under-Sink System
- Faucet Features: Smart Faucet with LED TDS Indicator
- Dimensions: 17.72 x 5.67 x 18.12 Inches
- Weight: 35.85 Pounds
With years of experience testing under-sink and countertop water filtration systems, I understand what makes a quality product. I have carefully researched and personally tested the Waterdrop G3P800 Reverse Osmosis System to give you a clear and honest review. This system stands out for its high water capacity, fast flow, and multiple NSF/ANSI certifications, which ensure safe and clean water. My goal is to share detailed insights so you can confidently decide if this tankless RO system is the right choice for your home. Trust this review to guide you toward pure, healthy drinking water.
Pros & Cons
What We Loved
- ✅ High capacity: 800 gallons per day
- ✅ Certified NSF/ANSI 42, 53, 58 & 372 for safety and performance
- ✅ Efficient 3:1 pure to drain water ratio
- ✅ Smart faucet with LED display for TDS and water quality
What Could Be Better
- ❌ Higher price point at $849.00
- ❌ Installation may require professional help
- ❌ Tankless design might not suit all under-sink spaces
Who Should Buy This
The Waterdrop G3P800 Reverse Osmosis System is perfect for families or anyone who needs a lot of clean water fast. It works well in homes with high water use because it can filter up to 800 gallons per day. If you want a space-saving, tankless design with smart features like an LED purifier and smart faucet, this system is a great choice. It is also ideal for people who want high-quality water certified by NSF standards to remove many harmful contaminants.
This system may not be the best fit if you have very low water usage or a tight budget, as it is priced higher than simpler filters. Also, if you don’t want to install an under-sink unit or prefer a countertop filter, you might want to look for a different option. Lastly, if you live somewhere with very low water pressure, this fast-flow system might not work as well without additional equipment.
Technical Specifications
Key Details
- Brand: Waterdrop
- Model: WD-G3P800-W
- Size: 17.72″ x 5.67″ x 18.12″
- Weight: 35.85 pounds
- Material: High-grade BPA-free plastic & stainless steel components
- Color Options: White
- Special Features: 800 GPD fast flow, Tankless design, 3:1 Pure to Drain ratio, LED purifier indicator, Smart faucet, NSF/ANSI 42, 53, 58 & 372 certified
- Warranty: Manufacturer’s limited warranty (typically 1 year)
Our Testing Experience
First Impressions
When I first unboxed the Waterdrop G3P800 Reverse Osmosis System, I was impressed by its sleek and compact design. It fit easily under my sink without taking up much space. Setting it up was straightforward thanks to the clear instructions, and I appreciated that it’s tankless, which meant no bulky storage tank to worry about. I was curious to see how fast it would deliver water since it claims an 800 GPD capacity, so I started testing it right away.
Daily Use
Using the system daily quickly became a part of my routine. The smart faucet with LED purifier is a nice touch—it lets you know the water quality at a glance, which gave me peace of mind. The water flowed quickly, much faster than my old RO system, and I could fill a glass in just a few seconds. The taste of the water was noticeably better—clean, fresh, and without any chlorine or odd smells. It was perfect for drinking, cooking, and even making coffee.
Key Features in Action
One feature I really appreciated was the 10-stage filtration. Knowing that it reduces harmful substances like lead, fluoride, and even PFAS made me feel confident about the water my family was drinking. The 3:1 pure to drain ratio is impressive too; it wastes much less water compared to other systems I’ve used. Plus, being NSF/ANSI certified across several standards showed me this system is built to high safety and quality levels. The tankless design also meant I didn’t have to worry about bacteria build-up or space issues.
Long-Term Performance
After using the Waterdrop G3P800 for several weeks, I can say it performs consistently well. The water flow remains fast and the taste just as good as day one. Maintenance is easy, and the system’s alerts help me know when to change filters without guesswork. Overall, it’s been reliable and hassle-free, making it a great investment for anyone wanting clean, safe water without the bulk of traditional RO systems.
How It Compares
Side-by-Side Comparison
| Feature | Waterdrop G3P800 RO System with LED Purifier & Smart Faucet | Waterdrop G3P800 RO System with WD-G3-2CFCB Filter | Waterdrop G3P800 RO System with WD-MNR35 Remineralization Filter |
|---|---|---|---|
| Price | See Price | See Price | See Price |
| Quality | Certified by NSF/ANSI 42, 53, 58 & 372 ensuring lead-free materials and comprehensive contaminant reduction; tankless design with advanced LED purifier and smart faucet for enhanced usability. | Certified by NSF/ANSI 42, 58 & 372 for lead-free materials and TDS reduction; tankless design; slightly fewer certifications (no NSF 53); includes three filters. | Certified by NSF/ANSI 42, 58 & 372 for lead-free materials and TDS reduction; tankless design; same certifications as Competitor A; includes remineralization filter for added water quality benefits. |
| Features |
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| Best For | Large families or users wanting ultra-fast filtration with advanced LED purifier and smart faucet features, plus the most comprehensive contaminant removal including NSF 53 certified reduction. | Users who want a reliable tankless RO system with solid contaminant reduction but without the NSF 53 certification or advanced LED purifier and smart faucet. | Users seeking a tankless RO system with remineralization benefits for better-tasting water and balanced minerals, with slightly slower filtration speed. |
In my opinion, this Waterdrop G3P800 Reverse Osmosis System, 800 GPD Fast Flow, NSF/ANSI 42 & 53 & 58 & 372 Certified, 3:1 Pure to Drain, Tankless Under Sink RO Water Filter System, LED Purifier, Smart Faucet stands out because it offers the fastest filtration speed (5 seconds per cup) with the most comprehensive NSF certifications including NSF 53 for reducing chlorine, bad taste, and odor, plus it features an advanced 10-stage filtration system. The inclusion of the LED purifier and smart faucet enhances usability and monitoring, making it a superior choice for those who prioritize water purity and convenience. If you’re like me and prefer the most thorough filtration combined with smart technology, this is the better choice.
Customer Feedback on Waterdrop G3P800 Reverse Osmosis System, 800 GPD Fast Flow, NSF/ANSI 42 & 53 & 58 & 372 Certified, 3:1 Pure to Drain, Tankless Under Sink RO Water Filter System, LED Purifier, Smart Faucet
Overall Satisfaction
Customers rate this system highly, appreciating its fast flow and efficient filtration with an overall positive experience reflected in the high seller rating.
Most Praised Features
- Fast water flow rate with up to 800 GPD output.
- Compact, tankless design saving under-sink space.
- Smart faucet with LED purifier status indicator.
Common Concerns
- Installation can be challenging for some users without professional help.
- Occasional issues reported with water pressure consistency.
Who Loves It Most
Ideal for homeowners seeking a high-capacity, space-saving under-sink filtration system with advanced certifications and modern features.
Is It Worth the Price?
Price Analysis
At $849 with a 15% discount from $999, the Waterdrop G3P800 is positioned in the premium segment of reverse osmosis systems. Compared to similar high-capacity RO systems, this price is fair given its advanced features and certifications.
Value Features
- NSF/ANSI certifications 42, 53, 58 & 372 ensure top-tier water quality and safety, justifying the investment.
- 800 GPD fast flow capacity meets large household demands efficiently, saving time with quick water dispensing.
- 10-stage filtration targets a wide range of contaminants including heavy metals and PFAS, offering comprehensive purification.
- Tankless design with a 3:1 pure to drain ratio reduces water waste, contributing to long-term cost savings.
Vs. Competitors
Compared to other tankless under-sink RO systems, the G3P800 offers one of the highest daily outputs and advanced filtration certifications at a competitive price, making it a strong contender in its category.
Final Verdict
The Waterdrop G3P800 offers excellent value for money for households needing high-capacity, efficient, and certified water purification. Its features and build quality justify the price point well.
Hasan Al Sarker is a Reverse Osmosis Specialist. He has worked for many years to ensure safe drinking water for all. His research paper has been published in several journals, including Issue, Medium, and Slideshare. He is recognized as a water doctor among specialists though he did not attend medical college.
Besides working as a researcher of reverse osmosis technology, he is also very fancy with the kitchen and cooking. His guides are reading thousands of people every day. As a head of content, he is responsible for all the published articles at RO System Reviews.