Waterdrop G3P600 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter, NSF/ANSI 42 & 53 & 58 & 372 Certified, Under Sink RO System, 2:1 Pure to Drain, Smart LED Faucet
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Dec 21 – Dec 22
Features
- Trusted certifications: Waterdrop G3P600 reverse osmosis system is certified against NSF/ANSI 58 for TDS reduction and NSF/ANSI 372 certified for lead-free material. Also it has been tested and certified against NSF 42 to reduce chlorine, bad taste and odor. The tankless reverse osmosis system is also certified by the Federal Communications Commission. Besides, it meets the EU Standards and UKCA Standards for safety.
- 8-stage filtration: Tested by official third-party laboratory (SGS), the reverse osmosis system can effectively reduce TDS, chromium, PFAS, radium, fluoride, arsenic salt, iron, calcium, particles, chloride, chlorine and radioactive substances in your tap water. And our RO water filter system can reduce chemicals such as vinyl chloride, ethylhexyl acrylate, isobutylene, ethylene glycol, according to the reverse osmosis membrane technical manual.
- Smart display faucet: The tankless reverse osmosis system is built with a smart display faucet. For instance, the TDS monitor tells you the quality of your filtered water, while the filter life tracker shows how soon you need to replace your filter.
- High capacity, 2:1 low drain ratio: As an upgraded reverse osmosis system, this reverse osmosis water system produces 600 gallons of filtered water per day. By its low drain ratio, this system can produce only one cup of waste water for every two cups of pure water produced. Furthermore, with a fast and stable water flow rate, this RO system fills a 8 oz cup of water in 8 seconds, which is ideal for drinking and washing vegetables.
- Tankless design: Waterdrop G3P600 reverse osmosis system has a stylish look. This tankless design saves 70% under sink space. You can change a filter in 3 seconds without moving the system or using any tools. Note: This reverse osmosis system requires under-sink electricity.
- Please measure your cabinet dimensions to ensure that the cabinet size is larger than the product size. The product size is 18.12"L x 5.67"W x 17.72"H.
Brand: Waterdrop
Special Feature: 8-stage Filtration, 600GPD high capacity, 21 low drain ratio, Smart display faucet
Product Dimensions: 18.12"L x 5.67"W x 17.72"H
Package Information: Cartridge
Installation Type: Under Sink
Power Source: Corded Electric
Item Weight: 32 Pounds
Model Name: WD-G3P600
Lower Temperature Rating: 41 Degrees Fahrenheit
Maximum Flow Rate: 0.42 Gallons Per Minute
Brand: Waterdrop
Special Feature: 8-stage Filtration, 600GPD high capacity, 21 low drain ratio, Smart display faucet
Product Dimensions: 18.12"L x 5.67"W x 17.72"H
Package Information: Cartridge
Installation Type: Under Sink
Power Source: Corded Electric
Item Weight: 32 Pounds
Model Name: WD-G3P600
Lower Temperature Rating: 41 Degrees Fahrenheit
Maximum Flow Rate: 0.42 Gallons Per Minute
Operating Pressure Range: 87 PSI
Upper Temperature Rating: 100 Degrees Fahrenheit
Supported Water TDS Level Maximum (PPM): 1500
UPC: 840814158555 840814161715 840814187616
Global Trade Identification Number: 55, 15
Manufacturer: Waterdrop
Part Number: WD-G3P600
Item Weight: 32 pounds
Item model number: WD-G3
Size: 600 GPD
Color: White
Style: White
Voltage: 110 Volts
Item Package Quantity: 1
Certification: Iapmo Nsf/Ansi Standard 58 & 372 Certified
Special Features: 8-stage Filtration, 600GPD high capacity, 21 low drain ratio, Smart display faucet
Batteries Included?: No
Batteries Required?: No
Warranty Description: 1 Year Manufacturer and Seller Combination
Date First Available: February 20, 2019
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Dec 21 – Dec 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
The cleanest H2O you can get is by distilling water, but this is pricey in the long run, so we had to look at the other options. With our utility rates running a distiller for about 8 hours in 24 hour period would cost us over $100 per month plus it is noisy and makes kitchen hotter. TDS of our tap water would run between 138 and 148 depending on season and we knew that even filtered water using a 0.5 micron filter would leave sludge at the bottom of distiller, so our water had a lot of dissolved solids in it after filtering. All this prompted us to look at the RO system and I'm glad we did. Top of the counter RO didn't make much sense as we would need to deal with all the tank filling and emptying. Tank based under sink system also wouldn't work too well because of volume limitations and space requirements, so we had to look at the tankless RO and G3P600 by Waterdrop seems to offer best performance for the money ratio, suitable for most households. In order to get the system installed I had to install electric outlet under sink and drill a hole in my stone countertop, but these issues aside, installation was easy and went without any snags. This system is fairly compact and we were able to keep most of the kitchen supplies that we normally kept under sink. After initial flushing the TDS shown on the tap screen was ranging from. 4 to 6, but when measured using a separate meter it was showing 25 ppb. Still very respectable. For comparison, TDS reading of our tap water was 140 and distilled water was 4. Water produced by Waterdrop RO tastes more like spring water, definitely harder than distilled and pH value confirms that too. For the RO system stable pH value after 3 minutes was 7.4 and for the distilled water it was 6.9. Distilled water is slightly more acidic, this is a known fact, because of no dissolved minerals in it. I expect annual costs of RO system to run between $120 and $150 which is a significant improvement over $1200 doing daily water distilling. Hope it is going to serve me at least 5 years of service time! Update: After two months of steady use, about 5 gallons a day, our TDS reading on RO system display and testing using a third party tester matches and is about 4 to 6 PPM that is excellent! Our Zojirushi "samovar" (hot water tank) didn't require cleaning so far indicating a really clean water. But the main benefit is convenience. Having clean water on tap as needed not having to wait for distillation cycle to complete is really an improvement in quality of life!
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Reviewed in the United States on August 23, 2025 by KC
I purchased the Waterdrop G3P600 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter in July 2025. I didn't get around to installing it until November. The install went easily, I only needed one water line adapter part from the hardware store to adapt to my particular system. There are great install videos on YouTube. The water taste is excellent and it is safe from contaminants. Problem: It had an internal leak and the catch tray filled up and I got an error code. I contacted WaterDrop, went through their diagnosis,. and provided photos. Krystal, the Customer Service Rep was exceedingly positive and helpful through the whole process. The unit was promptly and appropriately replaced and the new unit was switched out in 5 minutes using the parts already in place. Krystal provided detailed instruction throughout and made what could have been a problem, a simple fixe. So thank you Krystal, 5-Stars!
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Reviewed in the United States on December 12, 2025 by Douglas Douglas
I installed it almost a month ago and it is working great. Initially had a defective piece of faucet, but Weterdrop has an excellent customer service team who shipped an replacement immidiately which worked fine. It was a fast replacement and I did not have to wait more than 2-3 days. They are very communicative as well as prompt on reponse (both email and phone). The product itself is good. It displays TDS level each time you pour water. No leakage so far. If any one is facing issue it could be due to wrong installation. Installation is not difficult. If you are comfortable with little bit of plumbing DIY, you can install easily. No special tool or knowledge required. Instruction manual is good enough to install. There are YouTube videos as well. Overall I would recommend for sure.
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Reviewed in the United States on October 7, 2025 by Achir
30JUL25 This review is for the Waterdrop G3P600 filter. I am a service plumber and I have installed hundreds of under cabinet filters over the years. I typically tell my customers to find and provide the one that best suits their needs because I do not have any overall experience with how the work out after installation. I will be highly recommending this filter to any customer seeking recommendations. This filter is super easy to install, it has a clean, sleek, space saving design that does not take up your entire cabinet. Any moderately mechanical inclined person should have no trouble installing this unit, just read the directions, make certain that you have all of the required tools, and about an hour to spare; It will take maybe 30 minutes to install and another 30 minutes to purge the filters once installed. YOU WILL NEED AN ELECTRICAL OUTLET!!!! This model requires a 110v electrical outlet which will need to be within 5' of the top rear of unit! We typically buy Walmart brand bottled water in the 24 pack, once per week. Based on that usage we will save approximately $63 per year on filtered water; And, that is just for the first 600 gallons, after that the cost drops even more significantly because the unit will have paid for itself and all we will be buying a re the replacement cartridges( which at todays price on Amazon is approximately $170. All of the above are really good reasons to purchase this system, however the most important is taste! This is water that is treated with the Reverse Osmosis process, which when utilized correctly it will produce pure H2O. Pure water has no taste, and the water from this filter has no taste; which ironically, tastes great! I have always loved the Walmart brand water and when I tasted this and loved it more, I was super impressed! I have had this installed and have been using it four days now so I do not have the test of time to let you know how it will hold up, but based on my past experience with filters I do not expect any issues with this. You can save money buying a less expensive filtration system, but you get what you pay for, and for my money I think I will be better off with this one.
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Reviewed in the United States on July 30, 2025 by Scott F.