Remineralization 600GPD Reverse Osmosis Water Filter System

  • Waterdrop
4 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.
  • Natural minerals - added calcium, magnesium, sodium, potassium, etc.
  • 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.

Remineralization 600GPD Reverse Osmosis Water Filter System

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Remineralization 600GPD Reverse Osmosis Water Filter System

Model number
Total Filtration Capacity
1000 gallons
Materials: System cover
BPA-free plastic
Filter model
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
Components 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 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!
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.
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.
Faster Water Flow And Less 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.
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.
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.
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.
  • 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.
*Some of the reviews are synchronized from WaterdropDirect Store
Customer Reviews
4.5 Based on 4 Reviews
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Buy a Pitcher Also!

In the product description it says it may take the water 2-3 minutes before it comes out of the faucet, this is incorrect, it only take about 5 seconds. However, the water has to run for about 2-3 minutes before the TDS levels are optimal. It's kind of annoying to waste 3 minutes of water every time you want to fill up a glass but the solution is to buy a big pitcher and fill it up once per-day. This filter drops our TDS from 200-250 to 20-25, so I am happy with the outcome.

Filter replacements every ~300 gallons not 1000 = $267-356 to replace filters annually.

Love the taste, so many advantages as others have said. The life of the filter, not so much though so far. Live in Manhattan (NYC) where TDS in around 225, TDS out after 30 seconds anywhere between 4-7 which is remarkable. Purchased the Waterdrop Tankless 600GPD on Jan 27, 2021 and having used it daily for 90 days, making about 2-3 gallons per day for two people, plants and humidifiers. The "life of the filter" indicator light has 6 levels, and now it's down to level 1, indicating the life of the filter is almost over? Not sure if there is an error or problem, but I don't think TDS 225 or NYC water is that dirty. Will contact Waterdrop to confirm. But their estimates were 1 year or 1000 gallons which ever comes first. I'm estimating that we've made 250 gallons so far. While the product's water taste is phenomenal, the annual cost, plus as the filter becomes less efficient more quickly over time producing more waste water and the annual 'filter goes into landfill' waste becomes concerning O_o. Will contact Waterdrop and see what they have to say, will update this review.

R. Hernandez
install went easy

install went easy n the water is awesome

Tom S.
Easiest to install. No mounting filters.

I'm a plumbing contractor so obviously I looked around at RO systems. I really like the constant good pressure from it. None of the other ones have even close to the daily amount as this. 1 filter assembly is so much easier than 3-5 different filters. Pretty cool having the tds ppm display on the faucet! I'll definitely recommend this to my customers! Thanks waterdrop!

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