Waterdrop WD-G3-W Tankless Reverse Osmosis System Review

As far as under the sink tankless reverse osmosis systems go, Waterdrop WD-G3-W is a trendsetter. With it, you won’t have to wait around for a tank to fill before you can refill your glass. Actually, it’ll take you only a few minutes to get hydrated.

And did you know that Waterdrop G3 has zero chance of leaks? Yes, it’s one of the essential selling points of this system. Imagine the peace of mind you’ll get knowing that you won’t have to part with hundreds of dollars just to repair a leak!

There’s so much to marvel at about this masterpiece. You’ll find that out after going through the features of this RO system discussed herein.

Waterdrop WD-G3-W RO Reverse Osmosis Drinking Water Filtration System

Waterdrop WD-G3 W RO Reverse Osmosis Drinking Water Filtration System Features

  • Design

Waterdrop WD-G3-W comes in a compact and slim design, a feature that makes it possible for you to fit it under the sink. It’s also one of those systems that you’ll really love having in your kitchen space, thanks to its sleek tankless look that adds aesthetic pleasure to any kitchen.

  • Smart Pressure Pump

To speed up the production of pure water, this system uses a smart pressure pump. The pump detects the incoming water pressure and adjusts appropriately for the fastest RO process.

The built-in pump is also the reason why this unit sports a 1:1 pure to waste water ratio. This is because standard reverse osmosis systems without pumps usually create 5 gallons of wastewater to produce 1 gallon of filtered water.

  • Leakage Protector

The unit boasts a built-in leakage protector that monitors water in real-time. Traditional RO systems usually have tubing, connections and other points in the system that are pretty prone to leaking.

This protector also switches off water and power supply in case of a leak. In addition, it ensures the safety of other electrical appliances in the surrounding area.

  • Lead-Free Faucet

Waterdrop WD-G3-W comes with a lead-free faucet for installation at the sink area. In addition, this faucet features an LED light that turns on when in use.

The faucet is chrome-plated and made from brass, which helps prevent contamination of the clean RO water flowing from the system.

  • Filters

The unit is the 1st smart RO system with composite filters in the U.S market. The filters help to remove more than 1,000 harmful substances from the water effectively.

It comes with 3 filters that provide 7 stages of filtration. The pre sediment and high-granule carbon filter function as one filter.

These filters flush for 20 seconds after every two hours of filtering. This prolongs their life span as it prevents contaminants from building up.

And although they are included in the package, you’ll need to purchase more in the future for replacement purposes.

What are include with Waterdrop WD-G3-W RO Under Counter Reverse Osmosis Water Filtration System:

  • Pre sediment and carbon block filter

The filters offer the same functionality as a pre sediment filter and 2 carbon block filters combined. The 2 remove large particles from the water, including rust and salt, sand, chlorine and other chemicals that might affect the taste and smell of your water.

  • RO membrane filter

This filter is larger and even more efficient in this system than standard reverse osmosis filters in other units. With a height of 15 inches and 4.3” across, this membrane filters water thoroughly with the assistance of the pressure pump that prevents backflow.

  • Activated carbon block filter

Made from natural coconut shell, this filter returns the beneficial minerals into the purified water to minimize acidity remove unpleasant odor and enhance the taste.

  • Performance

By now, you know that this system doesn’t have a water storage tank, right? So, therefore, water is produced and sent straight to your faucet when it’s turned on.

The unit has a built-in pump that provides optimum pressure for speeding the filtration process. It makes it possible for the system to fill a standard-size glass with pure, clean and healthy drinking water in about 12 seconds.

It also offers a faster water flow of 400 gallons per day hence suitable for you if you have a large family.

The system also works at filtered water to wastewater ratio of 1:1 and saves water waste by 300%. With it, expect to pay less for your water bills.

Installation and Maintenance

This unit comes partially assembled and is designed for DIY installation in less than 1 hour. However, you’ll have to connect the unit to the faucet and power supply for the best results. Do this following the instructions included in the user manual.

You can also connect it to a refrigerator or icemaker, but you’ll be required to buy additional tubing for attachment.

After the first installation, you need to flush the system with water for 30 minutes. Note that this water isn’t suitable for drinking. You can, however, use it for other purposes like watering your flower garden.

Another thing to note is that Waterdrop WD-G3-W filters’ require changing every 6 months to 2 years. The good thing is that they are inexpensive and easy to replace.

The system suffers from no secondary pollution as it doesn’t have a storage tank, and thus additional cleaning and sanitization may be unnecessary.


The system is NSF 58 certified for TDS reduction and NSF 372 certified for lead-free material hence safe to use.

Product Summary

Waterdrop WD-G3-W is a tankless under the sink RO filtration system that produces a glass of pure drinking water in about 12 seconds. It has a filtered water to wastewater ratio of 1:1, makes 400 gallons of water per day and saves wastewater by 300%.

It filters water in 7 stages, removes 99.9% of contaminants from water, and improves its taste and smell.

Pros and Cons of Waterdrop WD-G3-W Tankless Reverse Osmosis

  • Compact, slim and space-saving
  • Has a larger RO membrane,3 times larger than standard membranes
  • Filtered water tastes great
  • Excellent water pressure at the faucet
  • Easy to install and maintain
  • Changing filters is a breeze
  • Boasts LED indicators
  • Quiet operation
  • Economical and environmentally friendly
  • Faster and reliable performance


  • Requires electricity to function
  • Higher TDS readings than most standard systems
  • A little expensive than other RO systems in the market
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