Your Shopping Cart

It appears that your cart is currently empty!

Reverse Osmosis System for Home
Reverse Osmosis System for Home
Reverse Osmosis System for Home

Reverse Osmosis System for Home

Model: WD-G2-W

218 reviews
*Get 20% off with code: BF20
Valid: 11.23-11.29 PST
In Stock
Guaranteed safe checkout


  • Waterdrop G2 Under-Sink Reverse Osmosis Water Filtration System is best suited to small homes.
  • The composite integrated filters result in more effective filtration.
  • The tankless design ensures the safety of your drinking water and saves over 70% under-sink storage space.
  • The fast water flow rate of 400 GPD, saving over 300% of water and resulting in a 1:1 drain ratio.
  • The advanced integrated design of the electrical and water circuits reduces leakage.
Model number
Item weight
 20.94 pounds
System cover: BPA-free plastic
Faucet: metal
MRO filter: reverse osmosis membrane & activated carbon block
CF filter: sediment PP membrane & activated carbon block
Product dimensions
17.3×5.9×13.9 inches
Item Model Number
White & Black
Components Included
 System cover, faucet, feed water adapter, MRO filter, CF filter, PE tubing*3, drain saddle, lock clip, Teflon tape 
Flow rate
400 gallons per day (GPD)
Indoor or outdoor use
Indoor use only
Wall plug
Usage conditions
Ice machines, Faucets, Aquariums, RVs, Well water
*If you use well water as the source, please ensure that the feed water is pre-filtered.
An electrical outlet is required to operate the RO system.
Removable contaminants:
TDS, chlorine, taste and odor, chloramine, scale, turbidity.
Carcinogens: chromium (hexavalent), chromium (trivalent), cadmium and cadmium compounds, ferric oxide.
Heavy metals: lead, mercury, barium, copper, radium 226/228, aluminum.
Microorganic contaminants: cysts.
Inorganic pollutants: arsenic and inorganic arsenic compounds, fluoride.
Organic pollutants: asbestos, benzene, formaldehyde, trichloromethane, chlordane, PFOA & PFOS, etc.
Waterdrop G2 Reverse Osmosis Water Filtration System, one of the latest products launched last year, is a water filter system dedicated to meet your urgent need for the highest contamination removal rate with a fast water flow. RO, the abbreviation of reverse osmosis, is a “superstar” technology employed in water purification systems, where partially permeable membrane is used. And we are striving for excellence to deliver the right water purifier for you. We have a series of drinking water filtration system. Let me tell you why choosing Waterdrop reverse osmosis drinking water filter system is one of the best decisions you will make!
For decades, we drink water directly from the faucet with no awareness of the fact that some substances in taping water are harmful to our health. Lead, for a start, is a toxic metal that comes from the pipe lines in almost every American household. Drinking lead-tainted water can lead to many problems. Once absorbed, lead will be stored in our bones as a continual internal exposure, waiting to be released as our bones demineralize. This may result in people getting possible health risks like high blood pressure, cardiovascular diseases. Children under age 3 is extremely vulnerable to it. Luckily, our ro water purifier is NSF 372 certified for lead-free material, effectively cutting off lead exposure from root. The system also got NSF 58 claim to reduce 94% of TDS, another main impurity we aim to conquer. TDS, standing for total dissolved solid, effects taste and odor of water if its level is exceedingly high. Removing TDS can give you a pure water free from unpleasant taste and odor. This is the reverse osmosis system you can ever have!
Besides all the certifications, Waterdrop reverse osmosis filter system uses composite ro water filter. This original move brings about excellent performance in filtration. The five-stage filtration of the home reverse osmosis water filtration system is achieved by combining multiple under sink water filter materials into the whole undersink water filter.
Water first goes through a pre-sediment PP membrane and a carbon block filter. The high-precision activated carbon block is made from natural coconut shell, the pore of the activated carbon block in which is much higher than that in other forms. This will not only remove sands, rusts, chlorine, etc., but it can also return some beneficial minerals back to water. After running through another sediment membrane for additional impurities rejection, water will face a reverse osmosis membrane, to remove 99% of TDS and heavy metals like arsenic and mercury. The efficiency equals more than three stages of filtration. Using ro membrane will give you an extra benefit—you don’t have to replace filters that frequently! The reverse osmosis filter can bring you so much convenience! With the last step of filtration through a secondary activated carbon block finished—mission accomplished! Any particles larger than 0.0001 μm will be filtered out. More than 1000 contaminants are blocked outside. There, a cup of water that is pure, healthy, absent of taste, odor and color is right in front of you.
This is what we give you—the reverse osmosis water. Bon appetit! Get you a water filtration system for home because this is the right home water filter using the ro filter!

How to remineralize water after reverse osmosis filtration?

You can add a mineral filter to you RO system.

How long do reverse osmosis filters last?

CF filter: 12 months or 1,100 gallons, whichever comes first. This may vary depending on filtered water consumption. MRO filter: 24 months or 2,200 gallons, whichever comes first. This may vary depending on filtered water consumption.

How do you know when to change reverse osmosis filters?

The filter life indicator light will change into red color to notice you to replace the filter cartridge.

What is the best reverse osmosis system for home?

Smart filter life reminder, Easy to install and Innovative tankless design.

Should we drink RO water?

The process of reverse osmosis does not make water unhealthy in any way. Rather, the purification benefits may protect you from many water-borne contaminants.

Is reverse osmosis water filter necessary?

Yes. Reverse osmosis water filter reduces many contaminants from your drinking water.

Is reverse osmosis water healthy for the human body?

Yes. Reverse osmosis water filter reduces many contaminants from your drinking water.

Is RO purified water good for health?

The benefits of drinking RO water are more than the drawbacks. RO water removes negligible amounts of calcium from the water but also removes harmful nitrates along with it.

Can bacteria grow inreverse osmosis system?

Waterdrop tankless RO filter doesn’t have a water tank. So it will prevent bacteria growing.

Does reverse osmosis system remove cadmium?

Reverse Osmosis will remove 95 - 98% of the cadmium in the water.

How to use waste water generated by a reverse osmosis system?

Wash your car. Watering your plants or home garden. Wash your utensils. Floor mopping.

Does RO water purifier soften water?

Yes. Reverse osmosis removes the sodium ions that cause hard water problems.

Is this reverse osmosis system remove fluoride from the water?

Our RO system uses reverse osmosis filtration technology with 8 layers of MRO membranes with a pore size of 0.0001um, the system can remove most contaminants including up to 90% of fluoride in water.

Does this reverse osmosis system for home require electricity to run?

Yes. it does.

Is this RO unit suitable for well water?

We do not recommend using well water as a source for the RO system.
If you want to filter well water, we suggest you install a Spin Down Sediment Water Filter.

Can the RO system be installed directly onto the main kitchen sink faucet?

You could use your own RO faucet with our product, but not normal faucet for tap water.

What is the size of the in-cabinet filter unit?

Our RO machine has a tankless design and its size is 17.32"*5.91* 13.98, which takes up very little space.

Does this system come with the tubing and fittings needed for install?

Yes, it comes with all the tubing and fittings needed.

Is this reverse osmosis system for the whole house?

This model cannot be used for the whole house. It is designed as an RO water filtration system with a dedicated faucet, placed under the sink.
more water filter models
more water filter models

Composite filter technology

  • The new composite filter technology employs an excellent filter combination to achieve more efficient filtration.
  • The composite water filters can effectively remove more than 1,000 contaminants.
Composite filter technology
CF Filter and MRO Filter

Composite integrated filters

  • CF filter removes rust, sediment, large particles, chlorine, taste and odor.
  • MRO filter effectively removes more than 1,000 contaminants, such as antibiotics, organic matter, heavy metals, nitrite, bacteria, and limescale. This reverse osmosis water filter improves the taste of water and provides purified water that is as fresh as spring water.

Reverse osmosis membrane

  • The reverse osmosis membrane has a pore size of 0.0001 μm, which is one-millionth of a strand of hair. Bacteria and viruses are 5,000 times larger than its pore size.
  • Therefore, only water molecules and some beneficial mineral ions can pass through the RO membrane. Heavy metals and other impurities are discharged from the waste water tubing.
  • The G2 RO membrane can remove 99% of harmful substances in water.
Reverse osmosis membrane
No-tank design

Innovative tankless design

  • The tankless reverse osmosis system ensures the safety of your family’s drinking water.
  • This compact RO system also saves over 70% more under-sink storage space as compared to traditional reverse osmosis water filter systems.
  • The tankless design avoids recontamination, such as bacterial growth.

Fills a cup of water in 12 seconds

  • This G2 Reverse Osmosis Water Filtration System offers a fast water flow rate of up to 400 GPD. Get a cup of filtered water in 12 seconds, satisfying your needs while saving time.
  • Compared to the traditional RO water filter system, which only has continuous water flow during the first two minutes, Waterdrop reverse osmosis system always has a stable water flow.
No waiting for pure water
Smart Filtration system

Smart filter life reminder

  • 3 colors of lights show the status of water filters.
  • Blue means your water filters are functioning well.
  • Purple means you need to replace the water filter soon. You still have 15 days to replace it.
  • Red means you have to replace the water filter immediately.

Easy to install

  • Installing the Waterdrop G2 under sink water filtration system takes less than 30 minutes.
  • Due to the twist-and-pull design, you can replace the water filter in 3 seconds.
Easy to install
Less consumption and more energy conservation

1:1 low drain ratio

  • All reverse osmosis water purification systems will produce concentrated water to discharge impurities.
  • Compared to traditional RO water purifiers, the G2 RO system produces less concentrated water and saves 300% more water.
  • You can collect concentrated water to mop the floor, wash your car, do laundry, etc.
Customer Reviews
4.9 Based on 218 Reviews
Write a Review

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
All end up well

Initially had some tds issues with the system. Thanks to the tech support these problems solved and the water quality now is very good.

Great System!! Easy Installation!!

So far so good!! Install was simple and the water quality is fantastic.

changyuan l.
Great product!

Great product, the water taste great, no more plastic bottle and save the money. Love It !

David B.
Really cleans my water

Very easy to install ,It does the job

tight w.
easy install easy to use and change filters

no quite the clarity of the tank style RO I had previously, but size and ease of use make up for that. tested water it was pure last RO made a hellish mess when changing filters, not this one...super easy and clean