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Home » Reverse Osmosis Systems » Waterdrop G3 Reverse Osmosis Review 

Waterdrop G3 Reverse Osmosis Review 

By: Stephanie Nielsen
Last Updated:
Our Review

Compact Design5

High Capacity5

Effective Filtration5

Re-mineralization Feature4

Long Filter Lifespan4

Overall Rating



  • Compact Design
  • High Capacity
  • Effective Filtration
  • Re-mineralization Feature
  • Long Filter Lifespan


  • Initial Investment
  • Filter Replacement Cost
  • No UV Filter

In our quest to find and review the most effective water filtration systems, we’ve come across the Waterdrop G3 Reverse Osmosis system. This product has been making waves in the market, so we decided to take a closer look to see if it lives up to the hype.

Waterdrop G3 P800 Specs and Features

Waterdrop G3P800
Waterdrop G3P800
Waterdrop G3P800
Our Score




  • Capacity: 800 GPD
  • Filter Lifespan: 12 months (CF/RO), 6 months (CB)
  • Warranty: 1 year
  • Re-Mineralization: Yes

The table above provides a snapshot of the vital specs of the Waterdrop G3 P800. Now, let’s dig deeper into each aspect of this premium reverse osmosis system to understand how it stands out in a crowded market.

Also Check Out: Best Reverse Osmosis Systems Of the Year

Waterdrop G3 P800 Reverse Osmosis Review 

When a product like the Waterdrop G3 P800 Reverse Osmosis system comes along, it tends to make the journey to finding a reliable, effective water filtration system a bit easier.

The unit promises to deliver not just purified water but also a user-friendly experience right from installation to regular maintenance. 

In the following sections, we delve into various aspects of the G3 P800 to determine how well it holds up to these promises and whether it’s a worthwhile investment for modern households.


The Waterdrop G3 P800 boasts a sleek, modern design that’s meant to complement contemporary kitchen aesthetics. 

Waterdrop G3 undersink installed.

Unlike traditional RO systems with bulky tanks, this unit is tankless, which greatly reduces its footprint and makes installation more straightforward. 

The compact design allows for under-sink installation without commandeering much-needed space. 

Its high-grade white plastic casing isn’t just for looks; it also protects the filtration system from damage, ensuring longevity.


At the heart of the Waterdrop G3 P800 is its 9-stage deep filtration process. 

waterdrop 9 stage fileration

This process begins with a CF (Carbon Block) filter which helps in removing larger contaminants and improving the taste and odor of the water. 

The RO (Reverse Osmosis) membrane follows next, effectively trapping and removing a myriad of microscopic contaminants. 

Finally, a CB (Carbon Block) filter gives the water a final polish before it reaches your glass. 

This comprehensive filtration ensures that every sip is fresh, clean, and safe.

Water filter cartridges

Contaminants Removed

The efficacy of a water filtration system is judged by the variety and amount of contaminants it can remove. 

The Waterdrop G3 P800 excels in this regard, with the capability of eliminating over 1,000 different contaminants. This includes a host of potentially harmful substances, including:

  • Heavy metals
  • Chlorine
  • Fluoride
  • Arsenic
  • And more

It ensures the water you consume is not just clear but also healthy.

Filter Lifespan/Maintenance

Maintaining the Waterdrop G3 P800 is fairly straightforward, thanks to the long lifespan of its filters.

The CF and RO filters require replacement every 12 months, while the CB filter needs changing every 6 months. This relatively long filter lifespan reduces the frequency and cost of maintenance, making the G3 P800 a cost-effective choice in the long run. 

The system also has a built-in indicator that alerts you when it’s time for a filter change, taking the guesswork out of maintenance.

Warranty and Customer Service

The 1-year warranty that comes with the Waterdrop G3 P800 provides a safety net for your investment. This warranty covers defects in materials and workmanship, giving you peace of mind. 

Additionally, many users have cited the responsive and knowledgeable customer service team from Waterdrop, which is always a plus when you need assistance with installation, maintenance, or troubleshooting.


The Waterdrop G3 P800 is designed with DIY installation in mind. The package comes with an instructional video and manual that guides you through each step of the installation process. 

All the necessary tubing and connectors are also included in the package, so you don’t have to make extra purchases. 

Most users find the installation process straightforward and manageable without the need for professional help.

What’s Included

The comprehensive package ensures you have everything you need to enjoy clean, safe, and tasty water from the get-go, by including:

  • Waterdrop G3 Reverse Osmosis system
  • Faucet
  • User manual and installation guide
  • All necessary tubing and connectors

Waterdrop G3 P800 Vs. Waterdrop G3 P600 

The choice between the G3 P800 and G3 P600 largely depends on the size of the household and daily water consumption. The G3 P800 with a capacity of 400 GPD is more suited for larger households or those with higher water consumption, whereas the G3 p600 would be ideal for smaller homes.

Need Filtered Hot Water? Check out the Waterdrop K6 Tankless RO Hot Water Filter.

FeatureWaterdrop G3 P800Waterdrop G3 P600
Capacity800 GPD600 GPD
Filter Lifespan12 months (CF/RO), 6 months (CB)12 months (CF/RO), 6 months (CB)
Warranty1 year1 year

This comparison aims to help you make an informed decision based on your specific needs, ensuring that you invest in a system that delivers the most value for your household.

What We Like About the Waterdrop G3 (Pros)

  • Compact Design: The Waterdrop G3 features a sleek, tankless design that not only saves precious kitchen space but also blends seamlessly with modern kitchen interiors. Its compact nature allows for easy under-sink installation, ensuring a clutter-free kitchen space.
  • High Capacity: With a capacity of up to 800 gallons per day (GPD), the Waterdrop G3 is capable of meeting the water demands of larger households. This high capacity ensures that you have a steady supply of purified water whenever you need it.
  • Effective Filtration: The 7-stage deep filtration process employed by the G3 ensures that over 1,000 contaminants are effectively removed from your water. This thorough filtration guarantees that the water you consume is clean, safe, and high-quality.
  • Re-mineralization Feature: Unlike many RO systems that strip water of essential minerals, the Waterdrop G3 has a re-mineralization feature that restores beneficial minerals like calcium and magnesium. This results in not only safe but also mineral-rich and tasty water.
  • Long Filter Lifespan: The long lifespan of the filters reduces the frequency and cost of maintenance. With the CF and RO filters lasting 12 months and the CB filter lasting 6 months, you get to enjoy a longer period of clean water before needing a replacement.
  • DIY-Friendly Installation: The Waterdrop G3 is designed for DIY installation, coming with a clear instructional video and manual. This feature saves you the potential cost and hassle of professional installation.
  • Responsive Customer Service: The responsive and knowledgeable customer service from Waterdrop is a big plus. Whether you need assistance with installation, maintenance, or troubleshooting, the support team is ready to help, making your experience with the G3 smooth and satisfying.

What We Dislike About the Waterdrop G3 (Cons)

  • Initial Investment: The upfront cost of the Waterdrop G3 is higher compared to some other reverse osmosis systems in the market. This initial investment might be a hurdle for some budget-conscious consumers.
  • Filter Replacement Cost: While the filters have a relatively long lifespan, the cost of replacing them can add up over time. This recurring expense is something to consider when investing in the Waterdrop G3 system.
  • No UV Filter: The Waterdrop G3 lacks a UV (Ultraviolet) filter which is a feature found in some other RO systems for killing bacteria and viruses. This might be a concern for individuals living in areas with highly contaminated water.

Final Thoughts

The Waterdrop G3 Reverse Osmosis system emerges as a robust and efficient water filtration solution especially tailored for larger households. Its sleek design, effective filtration process, and ease of installation are standout features that set it apart in a crowded market. 

The initial investment and the subsequent filter replacement costs are considerations one needs to factor in, yet the quality of water it delivers could very well justify the expense. With its re-mineralization feature, it not only ensures the purity of water but also its nutritional value, making it a health-conscious choice. 

Waterdrop G3 holds its ground as a reliable, user-friendly, and effective water filtration system. The responsive customer service is a cherry on top, ensuring that assistance is at hand whenever needed. 

All in all, investing in the Waterdrop G3 could be a step towards ensuring a consistent supply of clean and healthy water for your home, making it a worthy consideration.

Photo of author
Stephanie Nielsen
Stephanie worked as a department supervisor of kitchen, bath, and appliances at Home Depot, and water filters were part of the inventory she was responsible for assisting clients with so she learned the ins and outs of matching the right filtration device to homeowner’s needs. She also worked closely with Culligan water to educate customers about whole-home water treatment and softener systems.

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