600GPD Reverse Osmosis Water Filter System

  • Waterdrop
47 reviews
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Key Feature

  • Advanced composite reverse osmosis filter, 5 filters into 1 filter. Enjoy great filtration with a large filter surface.
  • Provides over 600 gallons per day of cleaner, safer drinking water.
  • 1.5:1 low drain ratio. More pure water but less waste water.
  • The D6 RO water filter system comes with a smart designer faucet which is made of lead-free, brushed nickel that has a high-end screen. The screen shows the real-time TDS level and the remaining life of the filter.
  • The tankless design prevents bacteria and viruses from building up.

600GPD Reverse Osmosis Water Filter System

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600GPD Reverse Osmosis Water Filter System

Model number
Total Filtration Capacity
1000 gallons
System cover: BPA-free plastic
Faucet: metal
Filter model: WD-D6RF
Filter materials: First PP cotton layer, activated carbon block layer, second PP cotton layer, RO membrane layer and post-activated carbon block layer.
Power cord length
73 inches
Product dimensions
15.98 x 5.98 x 11.97 inches
Flow rate
Componets Included
System cover, smart digital faucet, feed water adapter, PE tubing*3(79”), drain saddle, lock clip, power adapter(main power cable 73”, faucet’s power cable 59”)

What is new about the Waterdrop D6 RO water filter system?

The five-in-one composite filters in the Waterdrop D6 Water Filtration System combines multiple filtration technologies into one.
The first PP cotton layer filters out sediment, rust, and other large particles.
The activated carbon block layer reduces organic matter and chlorine.
The second PP cotton layer further reduces suspended matter and other impurities.
The reverse osmosis membrane layer has a filtration accuracy of 0.0001μm, which intercepts TDS, salt, nitrates, PFAS, lead, sodium, chromium, benzene, etc.
The post-activated carbon block layer reduces taste and odor to improve the taste of water.

What impurities can D6 RO water system remove?

The FIST composite filter, specially adopting DOW RO membrane can conveniently reduce most of pollutants including TDS, lead, chlorine, salt, nitrates, PFAS, lead, sodium, chromium, benzene, etc. The filtration process also eliminates bad taste and odor, leaving you with clean and great-tasting drinking water.

How to read the TDS? And why are there two numbers?

The faucet offers a real-time TDS display of your water quality at any point in time. The in-built LED and TDS sensors become active when the faucet is on. D6 reverse osmosis filter system has two TDS detectors, detecting TDS level before and after filtration respectively. It shows TDS level before filtration at first and then indicates TDS level after filtration two seconds later.

Does this home reverse osmosis system fit in my under sink?

It’s of 15.98 x 5.98 x 11.97 inches size and is the smallest 600GPD RO system in the market. The D6 adopts a simple tankless design. It requires little space in your kitchen and can conveniently sit under your sink without obstructing your perfect kitchen interior.

How do I install Waterdrop RO water filter system?

Along with a well-organized instruction manual, you can find a step-by-step RO water filter system installation video on the Waterdrop YouTube channel.

How often do I need to change the filter?

Filter use: 12 months or 1,000 gallons, whichever comes first.

What is RO water filter system?

Reverse osmosis (RO) is a water purification process that uses a partially permeable membrane to reduce ions, unwanted molecules and larger particles from drinking water. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side.

Does this reverse osmosis water system reduce chromium?

All of our reverse osmosis water filtration system are designed to reduce 94-99% of Chromium-6 in your water.

How well does this RO water filter system reduce nitrates?

All of our reverse osmosis water filter systems are designed to reduce 85-90% of Nitrates in your water.

Does this RO water system remove chemicals used to soften water?

This system will reduce chemicals in the water as well as sodium from a salt-based water softener.

Can this filter be used as a reverse osmosis water system for home?

No. This RO water system is just a point-of-use water treatment system.

Will this reverse osmosis filter system completely reduce fluoride?

All of our reverse osmosis water filtration systems are designed to reduce 94-99% of fluoride in your water.

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.

Does this home reverse osmosis system require an under-sink electrical outlet?

Since the system has the booster pump it will require an electrical outlet for the system to work.

Does this RO water filter system remove salt from my water softener?

Yes, the whole house reverse osmosis will reduce dissolved solids such as sodium or salt from your home's source water.

Does this reverse osmosis water filter system lower the pH of the water?

Yes, this reverse osmosis filter system should or could reduce pH but it depends on the source water and the mineral content of the source water.
Reduce Harmful Contaminants
Reduce Harmful Contaminants
Reduces most of contaminants
  • Waterdrop D6 RO water filter system adopts a 5-in-1 composite reverse osmosis filter with the DOW reverse osmosis membrane that has a pore size of 0.0001μm. This reverse osmosis filter is capable of reducing most of harmful contaminants from water, including TDS, lead, chlorine, salt, nitrates, PFAS, lead, sodium, chromium, benzene, etc. Now you can enjoy high-efficiency filtration with just one filter!
Composite filter technology
600 GPD Fast Water Flow
Faster water flow and lower waterwaste
  • Waterdrop D6 reverse osmosis water system is upgraded to have a flow rate of 600 GPD and a drain ratio of 1.5:1.
  • With an innovative internal pump and a larger filter surface, you can fill a cup of water in 8 seconds so that you can get water immediately without waiting for a long time, which is ideal for cooking and drinking.
  • The improved drain ratio means that dispensing 1.5 cups of pure water produces only 1 cup of wastewater, saving 450% of water compared to a conventional water filtration system for home.
Smart and stylish faucet
  • The RO water system comes with a smart and stylish faucet that has a high-end screen. The screen shows the real-time TDS level and the remaining life of the filter. It is waterproof, so you do not have to worry about electrical leakage. D6 reverse osmosis filter system saves you time and effort by monitoring filter’s life for you with the help of an indicator on the control panel.
Less Waste Water
Smart Designer Faucet
Easy installation
  • D6 home reverse osmosis system is designed for DIY installation within 30 minutes.
  • The push-in replacement design allows you to replace the reverse osmosis filter in 3 seconds without moving the system or using any tools.
  • The system needs electricity.
  • The system can not be connected to the refrigerator.
  • We do not recommend using well water as source for our RO systems.
Effective DOW® RO Membrane
  • With a pore size of 0.0001 µm, this reverse osmosis filter stands out among others for its better filtration and longer service life. It reduces most of viruses, harmful chemicals, heavy metals, pesticides, etc.
Huge DOW® RO Membrane
Tankless Design Saves Under-sink Space
Elegant tankless design
  • D6 RO water filter system employs tankless design and integral composite filter. Compared to traditional reverse osmosis water systems, the compact size of the D6 saves 70% of your under-sink space.
  • The tankless design also prevents recontamination in the water tank.
  • The D6 home reverse osmosis system has passed thousands of tests to lower the noise and avoid water leakage. You can barely hear anything after closing the cabinet.
  • The sound is quieter than a running laptop.
Advanced integrated circuit
  • The D6 reverse osmosis filter system has a composite water circuit, which greatly reduced water leakage compared with traditional whole house reverse osmosis. We improve seals and reduce connectors that exposed to the water circuit as well to achieve a better sealing effect.
Easy Set-up
Integrated Design
Work smarter, drink better
  • D6 RO water system has an advanced automatic flushing function and a water leakage protection system. Automatic self-flushing ensures the system always operates in a clean condition. Water leakage protection notifies you water of leakage in time, which avoids further risks and loss.
Kind notice:
  • Please refer to this diagram and be informed that you need to drill a hole on your countertop to place the smart faucet (No need for this step if your countertop already has a hole). Besides, an adapter will be installed on your household water tubing to connect to RO system’s wastewater tubing and input water tubing. Electricity is required to run the RO system.
  • We do not recommend using well water as source for our RO systems. We do not recommend connecting tankless RO to a refrigerator or ice maker.
Your Purchase, your Love
RO system protects each baby's health
Protects each baby's health
  • Newborns are very delicate. Compared to tap water, RO water is purer, cleaner and more suitable for babies. Milk powder made by RO water is easier to be absorbed.
A sip of nature doesn’t cost much
  • The remineralization filter can connect to all types of under sink water filter systems. By adding one filter, you can enjoy remineralized water with a refreshing taste. Please click here to purchase this add-on filter.
Composite filter technology

G3 RO Filtration System

G2 RO Filtration System

G2P600 RO Filtration System

G2MNR RO Filtration System

D6 RO Filtration System

M5 RO Filtration System

Beneficial Minerals × × × × ×
Flow Rate 400 GDP 400 GDP 600 GDP 400 GDP 600 GDP 50 GDP
Pure to Drain Rate 1:1 1:1 2:1 1:1 1.5:1 1:1.5
Faucet Smart faucet Ordinary faucet Ordinary faucet Ordinary faucet Smart faucet /
Display Filter lifespan & TDS Filter lifespan Filter lifespan Filter lifespan Filter lifespan & TDS /
Self-clean × × × ×
Holiday mode × × × ×
Electricity Required ×
Filter Cartridges WD-G3-N1CF






Noise 65db 55db 55db 55db 55db ×
Filter Lifespan CF-6 Mths
CB-12 Mths
RO-24 Mths
CF-12 Mths
MRO-24 Mths
CF-12 Mths
P6MRO-24 Mths
MNR-12 Mths
CF-12 Mths
MRO-24 Mths
12 Mths 12 Mths
Dimensions(inch) 18.06*5.68*17.76 17.32*5.91*13.9 17.32*5.91*13.9 17.32*5.91*13.9 15.98*5.98*11.97 14.76*8.35*13.9
[1] Information is based on Radionuclides in Drinking Water by EPA.
*Some of the reviews are synchronized from Amazon.com/ WaterdropDirect Store
Customer Reviews
4.4 Based on 47 Reviews
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Filter Reviews:
Water tastes so much better from this!

Okay so this unit was a bit of a pain to put in due to my piping, not the fault of the unit, but I just had to make a few plumbing changes to be able to install this. Placing in the included spout was easy as I followed the directions. The directions included are thorough and pretty detailed. I did have to drill a hole in my sink for this and it comes with a sizer that makes it easy to do so. Also make sure you have an outlet under your sink to plug this in. My sink is a little older so my cabinets did not have outlets inside.

After all of my plumbing issues to accommodate this, I am really happy with it. It is quiet, takes up little room under my cabinet due to its thin design, and my water tastes so much better. It is a little slower than I expected coming out of the included faucet but it doesn’t bother me as I strictly use it for drinking water and not for cooking but I can see how it may frustrate others who use it for boiling water, etc.

I like the simplicity of this in that it is small and only has one filter. The filter is also said to last longer than traditional units and should only need to be replaced once yearly. Of course that is dependent on how often you use the water from the filter. It is also nice to look at. The faucet matches my stainless appliances and has a digital display that show error messages and also the TDS reading. I am not the most savvy with water systems but I set it up without the use of a plumber and I can definitely tell a different in the taste of the water. It no longer tastes like I am drinking chlorine.

Sandra B.
Love this RO System!

The Waterdrop unit isn't a big bulky tank taking up all of the space under the sink like many are. Although tankless, the unit has great filtering producing great-tasting water quickly while wasting less water. It has a huge (600 gallon per day) capacity although with a little less pressure than a tank. Its smart LED faucet shows me how pure the water is that is coming out. It takes a moment to get used to there being a couple of seconds of delay between turning it on and the water starting to flow (unlike the instant response from a tank RO) but it is no big deal and totally worth it if you want to avoid a bulky, wasteful tank RO.

Great water

Great system much better and cooler water without the tank, more space in the cabinet. Quite a buy

Joan W.
Easy install. Works as described.

Easy install. Works as described.

Great water. Love it.

Great company and great clean water

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