Search  for anything...
Waterdrop

Waterdrop G3P600 Reverse Osmosis System, 8 Stage Tankless Reverse Osmosis Water Filter, NSF/ANSI 42 & 58 & 372 Certified, Under Sink RO System, 2:1 Pure to Drain, Smart LED Faucet

  • Based on 3,449 reviews
Condition: New
Checking for the best price...
$429.00 Why this price?
Save $110.00 was $539.00

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Oct 4
Order within 18 hours and 46 minutes
Available payment plans shown during checkout

Recently Viewed

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: ‎Please note Most RO systems do NOT recommend using well water as a source. Large particles in well water will clog the filters easily and shorten filter life.


Date First Available: February 20, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 4

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great filtered water and very easy to install.
This fits under a small sink perfectly. I installed it myself in less than 30 minutes with no issues at all. The water is clean and tasty. I was able to install a T fitting and run the filtered water to my GE ice machine for filtered ice and no refilling of the reservoir, which is a game changer. I am considering getting another one for a different sink in the house. Highly recommend this filter. ... show more
Reviewed in the United States on July 30, 2025 by Rahm
    • Compact, easy to install and efficient
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! ... show more
Reviewed in the United States on August 23, 2025 by KC
    • Customer Service is awesome!
I have read some of the reviews here and they describe my feelings exactly so I will be brief. The Waterdrop is a wonderful filter, it is easy to install, it works great and the water is clear and clean and great tasting. I have one at my home and ordered another for my condo down south. My friend ordered one on my recommendation and loves it. The product is great! However, things can happen and mine was leaking. I emailed the customer support and got a very fast reply with a suggestion of how to resolve the problem. I did what they said to do but it didn’t work. They immediately said they would replace it and a new showed up a few days later. It was an amazing experience since we have come to accept that there is rarely customer support anymore. This was amazing and their representative Krystal was the person you always pray for but never get. She’s amazing and the company is great. It was so wonderful to have had an experience like this in today’s world! Thanks again Krystal. I guess I wasn’t as brief as I thought I’d be. ... show more
Reviewed in the United States on May 27, 2025 by Erica A.
    • You get what you pay for!
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. ... show more
Reviewed in the United States on July 30, 2025 by Scott F.

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...