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Waterdrop RO Reverse Osmosis Water Filtration System, 600 GPD Fast Flow, Tankless, 1.5:1 Drain Ratio, Smart LED Faucet, Reduce TDS, USA Tech Support, WD-D6-B

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Waterdrop D6 reverse osmosis system adopts a 5-in-1 composite filter with a DOW reverse osmosis membrane that has a pore size of 0.0001 μm. The 5-stage filtration removes over 1,000 harmful contaminants from water, including TDS, lead, chlorine, salt, atrazine, nitrates, PFAS, lead, sodium, chromium, benzene, etc. Now you can enjoy high-efficiency filtration with just one filter! 

Waterdrop RO 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, 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 conventional RO. 

Innovative Technology

99.99% harmful contaminant removal rate

The composite 5-stage filtration intercepts 99.99% of harmful contaminants such as salt, nitrates, PFAS, lead, sodium, chromium, benzene, etc. You need to replace the filter only once a year.

1.5:1 low drain ratio

Dispensing 1.5 cups of pure water will produce only 1 cup of wastewater. Compared to traditional RO systems with a water tank, the D6 RO system saves 450% of water.

600 GPD fast water flow

You will get a cup of water in 8 seconds owing to a water flow rate of 600 GPD, which is 12x more efficient than traditional reverse osmosis systems. A booster pump with a huge capacity and an advanced filter membrane creates more effective filtration.

Designer smart faucet

The designer smart faucet comes with a screen, which can display the real-time TDS value and remind you to replace the filter.

Refreshing and Tasty water

After removing most of the limescale from your water, you can enjoy coffee with a luxurious aroma.

With the FIST filter, the filtered water contains no harmful chemicals. Now you can enjoy better-tasting meals.

RO water is especially good for making baby formula because it is purified.

Tasty water is also preferred by your pets, as RO water helps them stay hydrated and, therefore, energetic.



  • Shipping Time: 5-7 days
  • We process orders between Monday and Friday. Orders will be processed within 1-3 business days of ordering and shipped out the next day after the processing day. We don't ship on weekends.

Our Guarantee:

We truly believe we have some of the best products in the world and we want to make sure we back that up with a risk-free ironclad 30-day guarantee.

If you don't have a positive experience for ANY reason, we will do WHATEVER it takes to make sure you are 100% satisfied with your purchase.

Buying items online can be a daunting task, so we want you to realize that there is absolute zero risks in buying something and trying it out. If you don't like it, no hard feelings we'll make it right.

We have a business phone number 587.316.3487 you can text for the quick response and a 24/7/365 Ticket and Email Support. Please contact us if you need assistance.


Questions: Does this system fit in my under the sink?

Answer: It’s of 15.98 x 5.98 x 11.97 inches size and is the smallest 600DPD 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.

Question: How do I install the filter?

Answer: Along with a well-organized instruction manual, you can find a step-by-step installation video on the Waterdrop YouTube channel. Also, our team is always willing to help during your installation process.

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

Answer: 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 system has two TDS detectors, detecting the TDS level before and after filtration respectively. It shows the TDS level before filtration at first and then indicates the TDS level after filtration two seconds later.

Questions: Returns and warranty?

Answer: if for any reason our product doesn’t live up to your expectations, contact us for a replacement or a full refund. We have a business phone number 587.316.3487 you can text for a quick response and a 24/7/365 Ticket and Email support