Top 6 Best Waterdrop Reverse Osmosis Systems (2022 Review)

Are you concerned about the quality of your cooking and drinking water? If so, you definitely need to invest in a water filtration system.

And a reverse osmosis system is your best bet.

Reverse osmosis water filtration systems are highly effective as they provide pure water free of almost all types of impurities.

In this post, we provide an in-depth comparison of 6 high-quality RO systems from Waterdrop, one of the top brands in the water purification industry.

Waterdrop has designed more than 200 water purification products. It offers a wide range of water filtration systems, including under sink systems, whole house, and countertops, among others.

We hope you’ll get a system that best suits your needs after going through this review. Keep reading.

Waterdrop Reverse Osmosis Systems

Top Picks

A 7-stage tankless RO system with a daily output of 400 gallons, a low drain ratio of 1:1, comes with a built-in pump, a lead-free faucet, filter life indicator, and a TDS meter, measures 18.12 x 5.67 x 17.72 inches, weighs 31 pounds and is NSF/ANSI 58 and 372 certified.

This system boasts a compact body size at 5.91 x 13.98 inches, weighs 27.15 pounds, produces 600 gallons of water per day, has a filtered to waste water ratio of 2:1, has a filter life indicator, offers superior filtration performance, reduces 94% lead and TDS from the water, runs quietly and is easy to install.

A 5-stage tankless RO system that removes 99% of water impurities, has a fast flow rate of 400 gallons per day, a low drain ratio of 1:1, can connect to a fridge or ice maker, comes with a lead-free nickel faucet, is available in white and black, measures 17.33 x 5.91 x 13.98 inches and weighs 25.8 pounds.

This 6-stage tankless RO system has a fast water flow of 600 GPD, filtration accuracy of 0.0001 microns, drain ratio of 2:1, comes with a smart designer faucet with screen, measures 15.99 x 6.1 x 11.97 inches, weighs 22.6 pounds, features push-in filter cartridge design and operates quietly.

This countertop RO system uses UV light to sterilize the water, has an intelligent control panel, a drain ratio of 3:1, is energy-efficient, features an automatic flushing mode, long-lasting filters, requires zero installation, measures 17.13 x 7.01 x 15.55 inches, weighs 20.6 pounds and is easy to use.

A tankless unit with a daily output of 400 gallons, offers efficient filtration performance, has a low drain ratio of 1:1, comes with a mineral water filter, measures 17.33 x 5.91 x 13.98 inches, weighs 23.4 pounds, is easy to install and use and produces great-tasting water.

Choosing the Best Waterdrop Reverse Osmosis System

1. Waterdrpop WD-G3-W RO System

The Waterdrop WD-G3-W is an award-winning tankless water filter that takes up very little under sink space. It’s an innovative all-in-one system that filters water in 7 stages and gives excellent water purification results.

Using RO filtration technology with a filtration accuracy of 0.0001 microns, the WD-G3-W can effectively eliminate most contaminants in your water, including TDS, fluoride, limescale, and heavy metals.

The system uses advanced composite filter technology for better performance and fast filtration results. It adopts a better composite filter element and gets rid of slow water flow and storage problems.

Thanks to an integrated pump, the G3 boasts a super low drain ratio of 1:1. Compared to other RO systems, this amounts to water saving of up to 300%.

And note, the higher the water pressure, the less the water waste.

The integrated pump also helps increase the flow rate enabling the system to produce up to 400 gallons of water per day. This translates to 1 liter of water per minute.

When it comes to installing the G3, you don’t need to hire a plumber to do the work for you. In fact, all the pipes connect with ease onto the same side of the system.

An LCD on the faucet indicates when the filters require changing, while the LED display displays real-time TDS.

The pre-sediment filter requires replacement every 6 months, the RO membrane after every 2 years, and the activated filter every 12 months.


  • Comes in a tankless design hence space-saving
  • Has a daily output of 400 gallons
  • Highly efficient with a drain ratio of 1:1
  • Easy to install, use and maintain
  • Provides superior filtration performance
  • NSF/ANSI 58 and 372 certified
  • Lead-free smart designer faucet


  • Highly-priced
  • Not recommended for well water
  • No remineralization

2. Waterdrop WD-G2P600-W Reverse Osmosis System

If looking for a system with a higher water flow rate and a super low drain ratio, the WD-G2P600 is your best bet. It’s an upgraded version of the G2 in terms of water efficiency and flow rate.

It has a daily water production rate of 600 gallons and a filtered to waste water ratio of 2:1. For every 2 gallons of pure water, this unit wastes only a gallon of water.

The system takes only 8 seconds to fill a standard glass of water!

And it is more affordable than the WD-G3-W and offers a strong filtration performance to meet your daily clean water demands.

It filters water in 6 stages and can remove more than 99% of 1,000+ water contaminants to produce pure water for your family.

The WD-G2P600-W features a filter life indicator that displays filter status in 3 different colors. You’ll know that it’s time to replace the filter when the light turns red.

The G2 P600 boasts a small body size at 17.33 x 5.91 x 13.98 inches, thus space-saving. It also runs quietly under the kitchen sink with noise of less than 55dB.

And just like the WD-G3-W, this system is tested and certified against NSF/ANSI 58 & 372 and certified to reduce more than 94% lead and TDS.


  • Fills up a glass of water in 8 seconds
  • Produces 600 gallons of water per day
  • Filtered water to waste water ratio of 2:1
  • Removes more than 99% of contaminants in water
  • Tankless with a compact body, thus space-saving
  • Runs quietly


  • No automatic flushing feature
  • Only available in white
  • Requires electricity to run

3. Waterdrop WD-G2-W Reverse Osmosis System

The Waterdrop WD-G2-W is a smaller version of the WD-G2P600. It has 2 filters, a composite filter, and an MRO filter.

The sediment filter includes an activated carbon block and a sediment PP filter. It reduces sediment, large particles, colloids, rust, chlorine, and fluoride.

The MRO filter includes a sediment membrane, a large RO Membrane, and an activated carbon block. It reduces the most stubborn contaminants, including TDS and heavy metals.

Although it filters water in 5 stages only, the G2 still maintains a strong filter performance like the G2 P600 and the G3. Like the 2, it can remove 99% of harmful water contaminants.

It also comes in a tankless design and takes up 70% less space under the countertop and sink area.

The system has a high water output of 400 gallons per day and a super low drain ratio of 1:1. It saves 75% water when compared to traditional RO systems.

Thanks to the high water flow rate, the system can fill a glass of water within 12 seconds.

The system’s integrated design reduces leakage while the airtight housing reduces noise. The process of installing and replacing the filters is fast and more convenient than with other systems due to the twist-and-pull design.

The G2 is also very easy to install, and with basic DIY skills, it should take you less than an hour to set up.


  • Superior filter media ensures effective filtration
  • Connects to a refrigerator or ice maker
  • Comes with a lead-free brushed nickel faucet
  • It is 5.9 inches wide thus takes little under sink space
  • Wastes very little water
  • Has a daily output of 400 gallons
  • Available in 2 color options – white and black


  • No smart faucet
  • No automatic flushing

4. Waterdrop WD-D6-B Reverse Osmosis System

The Waterdrop WD-D6-B is a tankless 6-stage water filtration system that filters water fast and effectively.

It has a filtration accuracy of 0.0001 microns and reduces pollutants like TDS, lead, salt, nitrates, PFAS, benzene, etc., from water.

The system has a fast water flow rate of 600 gallons per day and can fill a cup of water in 8 seconds. It also has a low drain ratio of 2:1 hence highly efficient.

And like most Waterdrop RO systems, the D6 comes with an intelligent designer faucet with a high-end screen. The screen shows the remaining filter life and real-time TDS.

The unit measures 15.99 x 6.1 x 11.97 inches and weighs 22.6 pounds, lighter than most RO systems on the market.

It’s a compact system that saves up to 70% of under sink space. You can complete DIY installation in under an hour. Note that you need an electrical outlet to operate it.

The push-in filter cartridge design enables you to replace filters in seconds.

Noise and leaks? Not when using the D6. The system has passed thousands of tests indicating that it avoids water leakage and reduces noise.

Compared to standard RO systems, this unit has fewer connectors in the water circuit and an excellent sealing effect; hence safe to use.


  • Compact and fits under most sinks
  • A sleek appearance that complements any modern setting
  • Easy to install and 2 seconds filter replacement
  • Tankless thus prevents secondary pollution
  • Quieter than a laptop when in operation
  • Has an automatic flushing system


  • No remineralization
  • Requires electricity to operate

5. Waterdrop WD-N1-W Reverse Osmosis System

If looking for an easy–to–install and use RO system, the Waterdrop WD-N1-W might be your best bet. It’s a plug-and-play unit that will give you accurate real-time TDS readings.

The N1 is a countertop RO system with 2 filter cartridges that eliminate most harmful substances in the water.

When using this system, you also do not have to worry about viruses, bacteria, and other microorganisms. UV light automatically activates every hour and kills them all.

It also features a built-in intelligent control capable of displaying different TDS levels, filter life, auto-flush-mode water shortage alerts, and volume settings.

The system reduces wastage with an impressive 3:1 drain ratio and drains water recycling technology. And guess what…

It enters power-saving mode when not in use, which helps reduce power consumption. The unit is not only economical but also environmentally friendly!

When listing the most convenient RO systems, this model shouldn’t miss in your list. Maintaining it is effortless and has a 135.3 oz tank, which you’d seldom need to refill.

This system enters automatic flushing mode after you power it on for the first time. And since the filter cartridges are activated, they work efficiently for optimal filtration performance.

The N1 has long-lasting filters with a longer lifespan. The CF filter lasts 6 months and the MRO, 18 months. This means that you won’t have to replace them until later.

And the filter replacement process will take you seconds.

The Waterdrop WD-N1-W is installation-free hence, no drilling is required. In fact, it will suit you best if living in a rental home.

All you need is a socket, and you are good to go.


  • Requires zero installation
  • It is easy to maintain and use
  • Easy to set up anywhere
  • Has a filter life indicator and TDS meter
  • Features an auto-flushing system
  • Has an intelligent control panel
  • Portable and fits on most countertop spaces
  • Energy-efficient


  • Not NSF certified
  • No remineralization

6. Waterdrop WD-G2MNR-W Reverse Osmosis System

Last on the list is the WD-G2MNR-W reverse osmosis system, a tankless unit with a daily output of 400 gallons. It offers efficient filtration performance by reducing harmful substances like fluoride, lead, TDS, and heavy metals from the water.

With a fast and stable water flow of 400 gallons per day, you can fill a glass of water within 12 seconds when using the G2MNR. It has a low drain ratio of 1:1 and saves waste water by 300%.

One point in favor of this system is that it comes with a mineral water filter that adds beneficial minerals to the RO water. It adopts natural materials to reintroduce minerals like magnesium and calcium into the water.

The system is designed to be smaller than conventional reverse osmosis systems saving a lot of space under your sink. It is also easy to install, and filter replacements can be done in a few seconds without using tools.

From R &D, the WD-G2MNR-W has been tested countless times in every stage of the process. The integrated waterways and O-ring seals are upgraded to reduce leaks.


  • Comes with a remineralization filter
  • Easy to install with excellent instructions
  • Wastes very little water
  • Compact under sink installation
  • Provides great-tasting water
  • Offers efficient filtration performance


  • A little noisy


All these models from Waterdrop offer clean RO water on demand. They all provide speedy water production rates and super low drain ratios hence highly effective.

The main difference is in the number of water filtration stages, the additional 200 GPD rates from the G2 P600 and the D6 models, the remineralization filter in the WD-G2MNR-W, and of course, the price.

Therefore, the best Waterdrop RO system for your home depends on your needs, preference, and budget since all of them are high-quality and will offer great value to your home.

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