Waterdrop Reverse Osmosis Water Filtration System WD-G3-W Review

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waterdrop Reverse Osmosis Water Filtration System WD-G3-W

Our Rating:

Key Features:

Tankless Design

7-Stage Filtration

400GPD fast water flow

Smart faucet and Smart TDS monitoring panel

Drink cleaner water than before with this standout unit!

The Waterdrop G3 reverse osmosis filtration system is truly in a class of its own when it comes to providing your home with the cleanest and most filtered water possible. Remove up to 99% of all harmful substances with this tankless unit that shows you don’t need to break the bank or a wall to get the water you need.

This filter is ideal for those people who want the purest water possible and don’t want to install a large and expensive filtration system.

The sleek design that is also very easy to use means that you can use this system and enjoy looking at it at the same time. It fits right under your sink for easy access and cleaning when necessary.

If you are the person who wants the purest water possible from your tap, the Waterdrop G3 is just what you are looking for.

Review Criteria Ratings

Ease of Use4/5
Ongoing Costs3.5/5


  • Very easy to install and maintain for anyone
  • Smart features keep you informed about the filter status
  • Integrated pump design improves overall effectiveness and efficiency
  • Certified to reduce harmful compounds in the water
  • Tankless design for more practical usage


  • One of the more expensive options in its class
  • Lower water pressure compared to more powerful units
  • Can be slower to pour than other options

Should You Buy It?

This unit provides an array of features that make it stand out in its class. From the lack of a holding tank that would normally collect bacteria to smart features to inform the user, this filter changes the game when it comes to getting the cleanest water possible in your home.

Despite the premium price tag of the unit compared to other options, you are absolutely getting your money’s worth from your first to last glass of water with this unit.

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Waterdrop G3 Overview

The Waterdrop G3 is a unique offering in the water filtration market as it uses the reverse osmosis process to ensure your water is as clear as the mountain springs. We have all had those times when we get a glass of water just to be disappointed by the murky water that looks far from thirst quenching.

The seven stage filtration on this unit ensures every glass is crystal clear and the water is free from any bacteria or unwanted particles.

waterdrop filter under the sink

What makes this unit special is its tankless design that prevents bacteria and residue from building up beneath your sink and causing issues. The internal filtration within this machine is the gold standard for water filtration as it has been certified to fulfill the NSF 58 and 372 standards of water filtration. Its unique 7-step filtration design that uses three individual filters makes sure every particle that comes from your water supply doesn’t even come close to your final glass of water.

Despite being founded just in 2015, Waterdrop has proven themselves as a premium and trusted option in the filtration industry. They have a wide array of certifications to their name that they stand behind with every product. When you buy from Waterdrop, you’re buying from the best.

Features and Benefits

Tankless Design

The standout feature of this water filtration system has to be its tankless design. This makes the unit unique from the competition in many ways that are advantageous to the user. Starting with the overall footprint of the unit, not needing to have a tank means less space is taken up under your sink so you can still use that area for storage and have easy maintenance access.

waterdrop WD-G3-W under sink

Additionally, the tankless design has been proven to reduce the presence of bacterial and unwanted particles that can accumulate in the holding area. By getting rid of the need for a tank, Waterdrop can ensure that you are not drinking water that has been sitting and potentially getting exposed to harmful chemicals as it sits motionless. The tankless design goes a long way to ensure your water is always fresh and crystal clear.

An added benefit of a tankless design is also that you are not limited by output as you can drink as much water as you want. With a tank filter, you can only drink as much water as the tank can hold and has filtered. The tankless G3 allows you to keep on drinking and enjoying clean water for the whole day.

7-stage Filtration

A multi-stage filtration system is essential to ensuring every last particle is removed from your water so you can enjoy it in peace. The first few filters use their specially designed membranes to filter out larger compounds as the last few filters work together to make sure even the smallest of particles are kept out of your water.

From sand to tiny chlorine particles, this filtration system makes sure none of it gets to your drink.

waterdrop 7 stage filter

The composite filtration system even has the ability to keep out bacteria and viruses from the water that are often found in standard tap water. You can also get additional taste in the water as the naturally derived filter uses coconut shell to make sure the water tastes as natural as possible.

Another benefit of the composite filters is the fact they are much more compact than the traditional models, as evident in the Waterdrop units size, and changing a filter is also a very quick process.

Waterdrop tell us that the G3 uses a DOW reverse osmosis membrane, which is top of the range and explains why it comes with a premium price tag – one that I would be happy to pay for a water filter of this quality.

The only way you could get water this clean and healthy anywhere else is with an advanced chemistry degree and lots of patience.

400GPD fast water flow

Getting clean water is one thing, but getting your clean water fast is a whole other ball game. Traditional water tank filtration systems are very slow to pour and will have you waiting up to a minute to simply get a glass of water. With the 400 GPD (gallons per day) flow rate of this unit, you can be enjoying a refreshing and healthy glass of water in a matter of seconds.

waterdrop filter GPD comparison

The immediate filtration of the water means the water is ready only when you need it and comes through the filters into your cup in record time. The competition doesn’t even stand a chance when it comes to matching the raw speed of water flow that the G3 offers.

Smart faucet

waterdrop smart faucet

Knowing when to replace a filter on these types of filters used to be something that requires you to monitor every glass and drop poured from the sink. With the smart faucet of the G3, you get a very clear indication of when you need to start changing filters.

The three colors allow you to know when your water filtration is good, when it needs to be changed, and when it is close to needing a change.

Smart TDS monitoring panel

The filtration unit itself also has somewhat of a smart feature itself in that there is an easy to read display that provides you with some useful information. You will be able to glance at the body of the unit and get a clear indication of how clean your water is with a simple look. No longer do you have to guess how clear your water is as the G# makes your life as easy as possible.


iSpring RCC7AK 6-Stage Reverse Osmosis Drinking Water Filter System

iSpring RCC7AK 6-Stage filter

If you would rather have a tank designed system for your water, the iSpring RCC7AK may be a good alternative for you. The 6-stage filter works in a similar fashion to the G3 in that it uses a series of different filters to run the water through a number of membranes for cleaner water. The 6th stage of this product is unique in that it actually puts minerals into the water to give it a healthy alkalinity for enhanced water.

The lower price of the unit makes it a very convincing buy compared to the G3.

If you want to install it yourself, the easy component installation and smaller size makes installing this unit and its included faucet a breeze. Overall, this is a solid tank option that will offer you enhanced filtration for many years.

Boann BNRO6SYS Reverse Osmosis Filtration System

boann bnro6sys

The Boann BNRO6SYS is very similar to the iSpring offering in that it is a 6-stage tank filter that eliminates unwanted compounds from your water. The three individual filters work together to provide a 6-step filtration process that is designed to eliminate most unwanted compounds. If you are on a budget and just need a filtration device that works, this could be the filter for you.

A nice feature that is unique to this unit is an auto leak detector that will shut off the system if there is a potential leakage to prevent any damage within the system. The hose management of this unit is also nice as it will keep the area under your sink looking clean and organized. If you can get past the slower flow rate, this filter could be a great option with a tank.

Things To Consider Before Buying


The efficiency at which a filter works is essential to getting one that works with your needs. Sure, some filters may be able to produce a large amount of clean water, but how efficiently can they do it? Efficiency of a filter determines how much water you can get at a given moment and how fast the water will flow.

If you need water any time you pull the faucet, the G3 will serve you well as it uses a tankless design that filters the water as you need it. This makes the unit much more efficient than other options that take time to filter the water and can only provide what is prepared in the tank already. As far as filtration efficiency goes, the G3 is one of the best out there.

This filter also has a much higher flow rate that helps it efficiently get you the water you need on command.

Ongoing Costs

As is the case with any filtration device, there are going to be ongoing costs. These costs are most often associated with the need to replace the filters within the unit that actually make sure your water is getting properly cleaned. If you neglect to replace these filters as needed, your water will not be properly filtered and could even become harmful.

Replacing the three filters will likely need to be done at the same time and you will need to buy specific models from the manufacturer. These filters are somewhat expensive and the ongoing operating costs should be considered before you actually go ahead and get one of these units. Thankfully, the G3 tells you when you actually need to go ahead and replace your filters.


The installation of a filtration unit can either be a total breeze or a complete nightmare. In most cases, the hardest units to uninstall have large tanks and many tubes that are a struggle to deal with. The G3 has neither of these issues as it has a tankless design and very little tubing to worry about.

The faucet the unit comes with is also a breeze to install and will have you getting filtered water in no time. One thing to keep in mind about this particular model is that it will require power to run and you will need to find a way to get power to the filter itself.


When you and your family need clean water, the G3 is here to show that you can get it with ease. From its tankless design to its smart features that make it incredibly easy to use, the G3 makes getting clean water as easy as possible. The way this filter combines advanced filtration methods and modern technology makes it a great addition to any modern home.

If you can justify the somewhat expensive upfront costs, this filter will make sure that you get the cleanest water possible with any turning of the faucet.

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Aaron is the founder of and Essential Home and Garden. With over 15 years of hands-on experience in home ownership, lawn care, and gardening, Aaron is a seasoned expert in areas like lawn care, DIY, HVAC, and pest control.

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