Waterdrop G3P800 Reverse Osmosis Review 2023


This is our review of the Waterdrop G3P800 Reverse Osmosis System.

Choosing the best Reverse Osmosis system for your household can be a challenging task given the multitude of factors to consider and the abundance of excellent options on the market. That’s why we’ve drawn on our extensive experience in water filtration systems to create this comprehensive review of the Waterdrop G3P800 Reverse Osmosis system, to assist you in determining whether it is the right fit for your needs.

In our view, the Waterdrop G3P800 Reverse Osmosis is the best RO system available and is our top recommendation, as this NSF-certified RO system combines advanced filtration technology, smart design, and efficient performance, to provide high-quality, safe drinking water.

In this in-depth review of the Waterdrop G3P800 Reverse Osmosis system, we will provide a comprehensive analysis of its filtration capabilities, system design features, performance, capacity, installation & maintenance process, customer reviews, and potential alternatives. Our goal is to provide you with all the information you need to determine if the Waterdrop G3P800 is the right choice for you and your family.

Let’s get started!

Waterdrop G3P800 Reverse Osmosis System Overview

Waterdrop G3P800 Reverse Osmosis system is a modern and advanced water filtration system designed to provide you with clean, safe, and healthy drinking water at home. It is a compact and efficient system that uses a 7-stage filtration process to remove up to 99% of impurities, including chlorine, lead, arsenic, fluoride, bacteria, viruses, and other harmful contaminants.

This system features an innovative tankless design that allows you to have continuous access to clean water without the need for a bulky storage tank. The G3P800 model comes with a smart faucet that displays real-time TDS and water quality information, making it easy for you to monitor the system’s performance and ensure that you always have access to the best quality water.

With a maximum daily output of 800 gallons, the G3P800 system can meet the needs of larger families or even small offices. Its advanced filtration technology and high capacity ensure that you always have access to clean and healthy drinking water without any compromise on taste or quality.


In this review, we’ll take a closer look at the Waterdrop G3P800 Reverse Osmosis system, its features, performance, installation, and maintenance process, and help you decide if this is the right choice for your home or office.

Waterdrop G3P800 Reverse Osmosis Filtration Capabilities

The Waterdrop G3P800 Reverse Osmosis System has been independently tested and certified by NSF International against NSF/ANSI standard 58 for its reduction of contaminants, including lead, chlorine, arsenic, and more. Additionally, it has been certified by NSF/ANSI standard 372 for its lead-free construction, ensuring that the system is safe and healthy for daily use.

This Reverse Osmosis system removes more than 1.000 harmful water contaminants through 9-layers of filtration, distributed in 7 filtration stages:

  • 1st stage: PP cotton layer,  that removes large particles such as sand, rust, and dust
  • 2nd stage: Scale inhibitor layer, which helps prevent mineral buildup and scale formation in the RO membrane, prolonging its lifespan and improving its efficiency
  • 3rd stage: Activated carbon, which reduces chlorine, unpleasant taste and odor, as well as volatile organic compounds (VOCs)
  • 4th stage: Second PP cotton, which acts as a pre-filter that protects the RO membrane from clogging and prolongs its lifespan
  • 5th stage: RO membrane,  that removes up to 99% of TDS, heavy metals, and other contaminants
  • 6th stage: Post-activated carbon block, further removes any residual chlorine or bad tastes and odors
  • 7th stage:  UV lamp that sterilizes the water to kill any remaining bacteria and viruses

The Waterdrop G3P800 Reverse Osmosis system is equipped with an advanced UV light that uses a high-quality LED chip to reduce up to 99.99% of viruses and bacteria. This is an impressive addition to the system, as it ensures that the water is not only free from contaminants but also safe to drink.

The LED lamp has a lifespan of up to 50 years and can be automatically turned on when water flows through the system. The sterilization rate of the UV light is up to 99.9%, making it an effective way to ensure that your drinking water is safe and healthy for you and your family.

It’s worth noting that the Waterdrop G3P800 does not include a remineralization stage in its filtration process. However, if you desire the benefits of remineralized water, Waterdrop offers an optional MNR35 RO remineralization filter that can be easily added to your G3P800 system. 

The filter adds essential minerals back into the water, such as calcium, magnesium, and potassium, which can improve the taste and promote better hydration. Remineralized water may also provide additional health benefits, such as improving bone density and supporting heart health.


Waterdrop G3P800 Reverse Osmosis Design Features

The Waterdrop G3P800 Reverse Osmosis system is not only powerful in filtration, but also features a number of design elements that make it stand out in the market.

The system has a tankless design which saves 70% of under-sink space and ensures the safety of the water. Its stylish look is attractive and will complement any kitchen decor.

Additionally, the G3P800 is equipped with a smart faucet that allows users to monitor the TDS level and water quality at a glance, providing an added level of convenience. The system also includes a built-in filter life tracker which notifies users when it is time to replace the RO membrane or the other filters, ensuring that the system consistently produces pure water.

Furthermore, the G3P800 is equipped with a long-lasting LED lamp that automatically turns on when water flows by, providing advanced UV sterilization that kills up to 99.9% of bacteria and viruses. The smart faucet also prevents recontamination of water after it has been treated, making it a safer and more hygienic option for drinking water.

The Waterdrop G3P800 Reverse Osmosis System includes an auto-flush function that automatically cleans the RO membrane and removes impurities to extend its lifespan.

The system also has a leak detection function that shuts off the water supply when a leak is detected, preventing potential water damage. These features provide added convenience and peace of mind for users.

Waterdrop G3P800 Reverse Osmosis Performance

The Waterdrop G3P800 reverse osmosis system has an outstanding 3:1 waste water ratio, which means that the system produces just one cup of wastewater for every three cups of filtered water, differentiating this device as one of the most efficient in the market.

Compared to the average waste water ratio of 1:4 in other RO systems, the Waterdrop G3P800 is 12 times more efficient.


With such impressive efficiency, the Waterdrop G3P800 reverse osmosis system is a smart choice for anyone looking to save on water bills while enjoying an unlimited supply of purified water.

Waterdrop G3P800 Reverse Osmosis Capacity

The Waterdrop G3P800 reverse osmosis system boasts impressive performance with its high capacity of 800 gallons per day, making it ideal for larger families or offices with high water demand.

In addition, the advanced water dispensing technology allows for quick and easy access to filtered water, with the ability to fill a glass in just 6 seconds. This means you won’t have to wait around for your water to be filtered, making it more convenient for busy households or workplaces.

Also, due to its tankless design, the system provides immediate access to purified water, as there is no waiting time for the tank to refill.

Waterdrop G3P800 Reverse Osmosis Installation & Maintenance

Installing the Waterdrop G3P800 Reverse Osmosis system is very easy and can be completed in just a few simple steps. The tankless design of the system makes it much easier to install when compared to traditional under-sink RO systems.

The unit comes partially pre-assembled, and you can connect it to your sink with a flexible tube, without the need to plumb it into your water line. While you will need to install the system’s dedicated faucet, this is a straightforward process that can be completed by following the manufacturer’s instructions.

In terms of maintenance, the CF filter needs to be changed every 6 months, while the CB filter lasts for 8-12 months and the RO membrane lasts for two years. The UV lamp has a long lifespan of up to 50 years, with little or no maintenance required. The Waterdrop G3P800’s smart faucet also has a built-in filter change reminder, which will let you know when it’s time to purchase replacements.

After installation, it’s important to flush the system for 30 minutes to remove any remaining impurities. During the flushing process, the blue light on the smart faucet will flash, indicating that the system is in flush mode. Once the process is complete, the blue light will stop flashing, letting you know that it’s safe to use. It’s recommended to collect and use this water to water plants or something similar, as it’s not recommended for drinking.

For more detailed information, you can refer to the Waterdrop G3P800 installation manual available here, or watch their installation video tutorial here:

Waterdrop G3P800 Reverse Osmosis System Reviews

Waterdrop G3P800 Reverse Osmosis system has received great reviews from customers on both Amazon and Waterdrop’s website. On Amazon, it has a rating of 4.3 stars with over 100 reviews, and over 80% of the reviews are 4 or 5 stars. On Waterdrop’s website, the average rating is 4.6 stars, with most reviews being 5 stars.

Many customers have praised the system’s efficiency, speed, and high capacity. They also appreciate its compact design and easy installation. One customer wrote, “This system is so efficient and quick! I love that it doesn’t take up much space under my sink and that it produces so much pure water in a short amount of time. It was easy to install, and I appreciate the reminder feature for changing the filters.”

However, some customers have complained about the noise that the system makes. They note that it can be quite loud when the system is filtering water. Despite this, many customers still recommend the system due to its high performance and efficiency.

In summary, the Waterdrop G3P800 Reverse Osmosis system has received positive reviews for its high capacity, efficiency, and easy installation. While there are some concerns about noise, most customers agree that it is a great investment for providing pure and clean water for their families.

Waterdrop G3P800 Reverse Osmosis Alternatives

While the Waterdrop G3P800 Reverse Osmosis system is a great option for households looking for a high-capacity and efficient RO system, it may not be the ideal solution for everyone. If you’re looking for alternatives, there are other reputable brands and models available on the market that you can consider.

AquaTru Countertop Reverse Osmosis System

If you prefer a countertop Reverse Osmosis system to save you space under the sink, this is the right choice.

The AquaTru Countertop Reverse Osmosis System is a well-designed modern RO system that fits well in every kitchen, does not require installation, has a really low waste water ratio, and removes several contaminants through a 6-stage filtration process.

iSpring RCC7AK-UV Reverse Osmosis System

If you need to deal with well water the iSpring RCC7AK-UV Reverse Osmosis system might be the solution for you.

This NSF-certified RO system removes 99.9% of water contaminants through 7 stages of filtration, which the last one is composed of a UV filter that inactivates viruses and bacteria that are commonly found in well water.

Frizzlife PD600-TAM3 Reverse Osmosis System

Another great alternative is the Frizzlife PD600-TAM3 Reverse Osmosis system.

This Reverse Osmosis can reduce 99.9% of the contaminants in the water, and includes a remineralization filter that adds back beneficial minerals which raise the water pH to more than 7.5 making it more alkaline and improving its taste.

This system has an amazing performance as its waste water ratio is one of the best in the market at 1.5:1.

Our Verdict

If you’re looking for the best Reverse Osmosis system on the market, we strongly endorse the Waterdrop G3P800 as our top pick, and we selected it as the best overall RO system in our article about the best Reverse Osmosis systems.

If you are looking for a high-capacity RO system that can produce clean and pure water at a fast rate, then the Waterdrop G3P800 is the perfect choice. With a capacity of 800 gallons per day and a 3:1 pure-to-drain ratio, this tankless RO system is ideal for large families or households with high water usage.

Additionally, its compact size and easy installation make it a convenient and space-saving option. Its smart filter change reminder and low-maintenance components further enhance its appeal, providing peace of mind and ensuring optimal performance for years to come.

Overall, the Waterdrop G3P800 Reverse Osmosis system is an excellent investment for anyone who values clean, pure, and high-quality drinking water.

Promo: Use our code WFPG3P800 for a $199 discount on the Waterdrop website.