Waterdrop G3 Remineralization RO Water Filter System

  • Model:WD-G3-W-MZ

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Key Feature

  • Prevents Contaminant Buildup - The cross filtration method used in the RO System prevents bacteria and virus buildup.
  • Natural minerals - added calcium, magnesium, sodium, potassium, etc.
  • Space Saver - This Tankless design is only 5.68 inches wide, which helps saves space on the counter or under the sink.
  • Smart faucet - Blue light on the faucet means the filter condition is 'Perfect'. Yellow means 'Replace Soon'. Red means 'Replace Now'. The top quality faucet is made of food grade copper-zinc alloy with a brushed nickel plating.
  • Smart TDS Monitoring Panel - TDS means Total Dissolved Solids. The filter will show the quantity of TDS filtered out of your water.
  • NSF 58 & 372 certified - The RO System is tested and certified by NSF International against NSF/ANSI standard. (For details, please refer to the performance data sheet in the instruction manual.)

Waterdrop G3 Remineralization RO Water Filter System

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Waterdrop G3 Remineralization RO Water Filter System

Model number
NSF 58 & 372
System cover: BPA-free plastic
Faucet: metal + LED indicator light
RO filter: reverse osmosis membrane
CB filter: carbon block
CF filter: PP cotton & carbon block
Power cord length
90 inches
Product dimensions
18.25 x 5.7 x 17.8 inches
Item weight
15.44 pounds
Included components
System cover, brushed nickel faucet/chrome faucet, RO filter, CF filter, CB filter, PE pipes *3 ( 60" ), T-fitting, drain saddle, lock clips, power adapter (Main power cable 90", faucet's power cable 59")
Flow rate
0.28 gallon per minute (GPM), 400 gallons per day (GPD)
Indoor or outdoor use
Indoor use only
Wall plug
Usage conditions
 Ice machines, Faucets, Aquariums, RVs
                        An electrical outlet is required to operate the RO system.

What is the difference between Waterdrop and traditional RO systems?

Waterdrop RO system Traditional RO system
Tankless design
Flow rate 400GPD 50GPD
Smart leakage protector
3s filter change time
Drain ratio 1 : 1 1 : 3
Real-time Water Quality Display

What is reverse osmosis water systems?

Reverse osmosis (RO) is a water purification process that uses a partially permeable membrane to filter out impurities from drinking water. In reverse osmosis, an applied pressure is used to overcome osmotic pressure, a colligative property that is driven by chemical potential differences of the solvent, a thermodynamic parameter. The result is that the solute is retained on the pressurized side of the membrane and the pure water is allowed to pass to the other side. To be "selective", this membrane should not allow large molecules or ions through the pores, but should allow filtered clean water to pass freely.

How does a reverse osmosis system work?

A reverse osmosis system reduces sediment and chlorine from water with a prefilter before it forces water through a semipermeable membrane to reduce dissolved solids. After water exits the RO membrane, it passes through a postfilter to filter the drinking water before it enters a faucet.

Does the reverse osmosis water filtration system produce wastewater?

All RO systems will produce concentrated water to discharge impurities. Compared to traditional RO water purifiers, Waterdrop 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.

What contaminants can Waterdrop reverse osmosis water filter system remove?

Waterdrop reverse osmosis water filter system adopts advanced composite filter technology. Uses the characteristics of various filter materials skillfully and combines them to achieve better filtration. The composite filter can intercept most harmful contaminant.
  • 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.

Does Waterdrop reverse osmosis water filter system need power?

The RO system has a pump that will need power to maintain a fast water flow rate.

Do I need plumbing services to install the reverse osmosis system?

No. Waterdrop RO systems are designed for DIY installation. You can install the system in 30 minutes. Simply refer to the instruction manual and instructional videos, or contact us by email, phone, or live chat.
This video explains how to install Waterdrop RO system.

How often do I need to change the RO filter?

G3: The CF filter has a 6-month lifetime; the CB filter has a 1-year lifetime; the RO filter has a 2-year lifetime. Waterdrop G3 Reverse Osmosis System has a smart faucet and filter life indicators that will remind you to replace the filter.

Does the reverse osmosis system make a loud sound?

The sound will not exceed 65 dB, which is a comfortable level for everyday life (65 dB is tested under standard laboratory conditions, where the feed water pressure is between 14.5 psi and 87 psi). A loud sound may be caused by the following:
a. The system is not positioned in a flat area. Make sure the system is placed smoothly without shaking.
b. The system is placed against the cabinet. Do not place the system against the cabinet. The system may vibrate when it works.
c. The water pressure is unstable. Check and confirm the water pressure is between 14.5 psi and 87 psi. The sound will decrease when the water pressure becomes stable.

When you change filters, do you need to turn the water off?

The water source and power supply are not required to be cut off when the filters need to be replaced. The replacements can be directly screwed and reinstalled. RO system can be normally used after resetting and the flushing process are finished.

Does the RO system remove coliform and other parasites?

Our RO system uses reverse osmosis filtration technology with a filtration accuracy of 0.0001um, and the system can effectively reduce most contaminants, including coliform and other parasites.

Does this system eliminate or remove Atrazine?

As a benefit of the RO membrane (filtration accuracy: 0.0001μm), this system is able to reduce the atrazine from the source water. In addition, the composite filters of G3 can also reduce chlorine, fluoride, heavy metals and provide you with fresh and tasty water.

Does this RO water system remove arsenic?

As a benefit of the RO membrane (filtration accuracy: 0.0001μm), this product is able to reduce the arsenic efficiently from the source water. The membrane has microscopic pores that are specially sized to allow water molecules through, while trapping larger inorganic molecules like lead, iron, chromium and arsenic.

Is this reverse osmosis water filter system unit suitable for well water?

We do not recommend using well water as source for our RO systems.
The reasons are as follows:
1. Large particles.
Compared to municipal tap water, the well water is rich of large particles, which will clog the filters easily, and shorten their lifetime significantly.Please note that the filters will still need to be replaced more frequently, even if you have added a pre-filtration system.
2. Composition
The well water has very complicated compostion, and some of them (apart from the large particles) can cause the filter or internal valve to be clogged and prevent the RO system from normal performance.
3. Water pressure
The well water may not provide the feed water pressure that the RO system requires (14.5 psi min.). Furthermore, the water pressure will be even lower after passing through pre-filtration systems.

Do you need to have an electrical outlet under your sink for this work?

As a standard appliance, this product will need to be plugged into one electrical outlet to function normally.

Does this RO system need a drain piping nearby for discharge?

Yes, this model does need a drainpipe nearby, for discharging the waste water. For that, we provide an adjustable drain saddle to connect the RO's waste water tubing to your drainpipe.

What is the amount of space required between the RO unit and the cabinet?

In order to avoid the vibration which can affect the use experience, please ensure that there is an about 1-inch gap between the RO system and the cabinet. The size of the RO Filtration system is 18.06 "* 5.6" * 17.76 ", without a storage tank. It's very thin and takes up very little space.

Has this RO water system been NSF certified yet?

Yes, our RO system has been tested and certified by NSF International. Here is the link for your reference.

Is the water line hose 1/4" or 3/8"?

Inlet tubing: 3/8", Outlet tubing (connect with RO faucet): 1/4", Feed water adapter: compatible with 3/8" and 1/2" water line.

Can I buy the accessory kit so that I can hook up my fridge all at once?

Yes, the instruction manual explains how to connect the Waterdrop to your fridge using parts purchased from a hardware store. The output from the Waterdrop to the faucet is 1/4” tubing. If your fridge has a 1/4” input, all you need is a 1/4” quick-connect T-adapter and the tubing that you’ll run to your refrigerator - you can find these online or at your local hardware store. If your refrigerator is like mine, the input is 3/8”, so I had to add an additional 1/4” to 3/8” adapter to the line leading from the T-adapter to the fridge. It doesn’t affect the performance of the Waterdrop at all.

Is this reverse osmosis water system BPA free?

Please note that our RO system is BPA free.

What does Pure to Drain Rate mean?

The reverse osmosis water filter relies on a semi-permeable membrane to filter out impurities from drinking water. When the tap water is compressed through the RO membrane, it produced pure water and waste water. The ratio of pure water to waste water is called wastewater ratio. 1:1 wastewater ratio means 1 gallon water is wasted per 1 gallon purified, and 2:1 wastewater ratio means 1 gallon water is wasted per 2 gallon purified. The higher the wastewater ratio is, the less waster water produced during the filtration process. During the use of RO water filter, the actual ratio might be lower than the labeled, depending on many factors such as water quality, pH, pressure and temperature.
NSF 58 & 372 Certified
  • Waterdrop reverse osmosis water filter system is tested and certified against NSF/ANSI standard 58, so over 90% of TDS can be reduced after complete flushing.
  • Tested and certified against NSF/ANSI standard 372, Waterdrop RO system employs lead-free materials, giving you a safe product.
  • G3 RO system passed 400+ chemical lab tests, which proves that this system does not contain most chemical substances.
  • System is tested and certified by NSF International against NSF/ANSI Standard 58 for the reduction of TDS, and against NSF/ANSI 372 (≤0.25% lead).
7-stage Deep Filtration
  • Reduces chlorine, taste and odor, sand, rust, solids, and other impurities. Reduces TDS, limescale, heavy metals, bacteria, viruses, and other most harmful contaminants.
  • Improves the taste of water. Carbon block is made from supreme coconut shell, ensuring that you enjoy ultra-fresh, healthy, great-tasting drinking water.
Huge DOW® RO Membrane
DOW® RO membrane is better at removing contaminants due to its longer life and higher quality.
A Sip Of Nature Doesn’t Cost Much
  • This reverse osmosis system comes with an external RO remineralization filter to add beneficial minerals.
  • 18 natural materials are adopted to restore minerals. You will benefit from RO mineral water in the long run.
Selected Natural Minerals
This system adds beneficial essential minerals to you water by using selected natural mineral stones rather than artificial chemical materials which could release harmful chemicals.
RO Mineral Water’s Benefits
  • Enhance bones: Improve bone health and help prevent diseases such as reducing post-menopausal bone density.
  • Lower bad cholesterol: Lower harmful cholesterol with magnesium and potassium content.
  • Promote digestion: Help digestion by increasing the amylase secretion from the pancreas with its sulfate content.
  • Improve skin: Rich mineral content moisturizes the skin and delays wrinkles.
*Contents mentioned above are benefits of mineral water, not Reverse Osmosis System with remineralization.
400 GPD Fast Water Flow
  • Get 1 cup of water in 12s.
  • Water flows faster than in ordinary RO systems.
  • No more waiting for crisp water. Immediate filtration, water is always fresh!
Smart Designer Faucet
Displays water quality in real time, understands every drop of water.
Smart TDS Monitoring Panel
Water quality is clear at a glance.
Tankless Design
  • Prevents bacteria from forming, thereby ensuring the freshness of your water.
  • Saves 50% in under-sink space, leaving your kitchen clean and organized.
Easy To Install & Replace
  • Waterdrop G3 RO system can be installed in 30 minutes, and the filter can be changed in just 3 seconds.
  • There’s no need to move the system, nor is there a need for tools.
  • It's highly recommended to install our RO system with components provided by Waterdrop. Installing the system with any parts or accessories that are not provided by Waterdrop may cause the system to malfunction or shorten the lifetime of the system/filters.
1:1 Low Drain Ratio
Waterdrop Reverse Osmosis Water Filtration System saves water waste by 300% compared to conventional RO systems.
Automatic Flushing
  • To maintain and extend the life expectancy of filters, the G3 Reverse Osmosis System can automatically initiate flushing when it accumulatively works for up to 2 hours.
  • This not only eliminates clogs but also maintains the filter and extends its life.
Holiday Mode
To ensure fresh and healthy filtered drinking water, the G3 Reverse Osmosis System is automatically flushed when no water is dispensed for 24 hours.
Overworked Reminder
  • When the system continuously produces water for 30 minutes, the buzzer will beep for 3 minutes.
  • The system will stop producing water, and the filtering indicator and power indicator will turn off.
Starting And Stopping Frequently Reminder
  • When the booster pump is frequently started and stopped for 20 minutes, the buzzer will beep 5 times.
  • The system will stop producing water, while the filtering indicator and power indicator will turn off.
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Beneficial Minerals × ×
Flow Rate 400 GPD 400 GPD 600 GPD 600 GPD 800 GPD 400 GPD
Pure to Drain Rate
Drain ratio stands for the ratio of wastewater and purified water dispensed by a RO system. For example, the 3:1 drain ratio means it uses up a gallon of wastewater for every 3 gallons of pure water you get.
Pure to Drain Rate Pure to Drain Rate Pure to Drain Rate Pure to Drain Rate Pure to Drain Rate Pure to Drain Rate
Faucet Smart faucet Ordinary faucet Smart faucet Ordinary faucet Smart faucet Smart faucet
Display Filter lifespan & TDS Filter lifespan Filter lifespan & TDS Filter lifespan Filter lifespan & TDS Filter lifespan & TDS
Self-clean × ×
Holiday mode × ×
Electricity Required
Filter Cartridges WD-MNR35












Noise(≤) 65dB 55dB 55dB 55dB 65dB 65dB
Filter Lifespan CF-6 Mths
CB-12 Mths
RO-24 Mths
MNR-12 Mths
CF-12 Mths
MRO-24 Mths
12 Mths CF-12 Mths
P6MRO-24 Mths
CF-6 Mths
CB-12 Mths
RO-24 Mths
CF-6 Mths
CB-12 Mths
RO-24 Mths
Dimensions(inch) 18.06*5.68*17.76 17.32*5.91*13.9 15.98*5.98*11.97 17.32*5.91*13.9 18.11*5.67*17.72 18.11*5.67*17.72
*Some of the reviews are synchronized from Amazon.com/ WaterdropDirect Store
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