--- product_id: 539302699 title: "Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6" brand: "waterdrop" price: "€ 1768.61" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.hr/products/539302699-waterdrop-reverse-osmosis-instant-hot-water-ro-filter-system-600 store_origin: HR region: Croatia --- # 5-Stage Deep Filtration Smart LED Faucet Display 600 GPD Instant Hot Water Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6 **Brand:** waterdrop **Price:** € 1768.61 **Availability:** ✅ In Stock ## Summary > 💧 Hot, Pure, and Smart — Elevate Your Hydration Game Instantly! ## Quick Answers - **What is this?** Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6 by waterdrop - **How much does it cost?** € 1768.61 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/539302699-waterdrop-reverse-osmosis-instant-hot-water-ro-filter-system-600) ## Best For - waterdrop enthusiasts ## Why This Product - Trusted waterdrop brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable, Premium Materials:** Stainless steel faucet and heat-resistant Teflon tubing ensure longevity, corrosion resistance, and allergy safety. - • **Advanced 5-Stage Filtration:** Deeply purifies water by reducing TDS, heavy metals, PFAS, fluoride, and more for crystal-clear, healthy hydration. - • **Instant Hot Water On Demand:** Dispense perfectly heated water (40-95°C) in seconds—ideal for coffee, tea, and cooking without waiting. - • **Smart LED Faucet with Safety Lock:** Real-time TDS and filter status at a glance plus child lock and temperature indicators for worry-free use. - • **Tankless Design with Efficient Flow:** 600 gallons per day capacity with a low 2:1 pure-to-drain ratio saves water and space under your sink. ## Overview The Waterdrop WD-KJ600/WD-K6 is a first-to-market tankless reverse osmosis system that combines instant hot water dispensing (40-95°C) with advanced 5-stage filtration, reducing harmful contaminants like TDS, PFAS, and heavy metals. With a high flow rate of 600 GPD and a smart LED faucet displaying real-time water quality and filter status, it offers a sleek, space-saving solution for under-sink installation. Built with premium materials and safety features, it delivers clean, hot water efficiently while minimizing water waste with a 2:1 pure-to-drain ratio. ## Description First-to-market RO system with heating. Dispense hot water 40-95°C, 5-stage filtration to reduce TDS, chromium, PFAS. Tankless, smart LED faucet for clean water on demand. Review: Overall happy, Vender support is responsive, water quality is good, Instant Hot water is useful. - All in all happy. Instant Filtered hot water is very useful TDS started ~20 & went up to ~50 after ~6 months. A replacement filter returned it to ~15 & rose to ~38 after 11 months. Another issue was E06/E05 errors ~ 20 months in. I contacted Water drop & they agreed to ship a replacement if I paid £90. The replacement came with a new filter so was les than a filter for a new machine. whilst I was miffed at paying £90 the prospect of paying less than a new filter around the time it was due to replaced & getting a new machine made sense. Didn't take long to swap the old for the new. Review: Great product. - Easy setup, works great. Filter clean from 240 tap water to 15, but screen on tap show 7. And also before was worse tap water around 340 and result was the same ## Features - [First-to-market RO system with heating function] The KJ600/K6 instant hot water dispenser reverse osmosis system can dispense hot water to meet your different demands. Adjust the temperature as you wish in the range of 40-95°C. 5-stage deep filtration, can effectively reduce TDS, chromium, PFAS, fluoride, arsenic, salt, heavy metals, nitrate, particles, chloride and other harmful substances. - [First-to-market RO system with heating function] The KJ600/K6 reverse osmosis system integrates water purification and heating, and breaks through a conventional under sink RO water purification mode. - [Hot water at desired temperature in seconds] The tankless reverse osmosis system KJ600/K6 allows you to adjust the temperature as you wish in the range of 40-95°C, which is an ideal choice for cooking soup, making instant coffee, tea and oatmeal or other household tasks. However, please note that external factors like weather and temperature of your cup may ultimately affect the temperature of water. - [5-stage deep filtration] The 5-in-1 filter of the reverse osmosis water filtration system is built with an RO membrane, a carbon block, PP cotton and other filtration substances and can effectively reduce TDS, chromium, PFAS, fluoride, arsenic, salt, heavy metals, nitrate, particles, chloride and other harmful substances through fine filtration layer by layer to achieve deep purification. Besides, this system can reduce calcium and magnesium, and reduce the hardness of water. - [High-end smart display faucet] By means of a smart display faucet of the ro system, the TDS level and the filter condition are available at a glance. The smart display faucet also has functions of child lock and water dispensing temperature indication to avoid scalding risks and ensure safety during use. The reverse osmosis water filtration system allows temperature adjustment, bringing smart and convenient life experience. - [Outstanding safety performance] The instant hot water dispenser KJ600/K6 can automatically monitor the water purification process. The hot water dispenser is built with a flow meter, NTC and a heating overtime protection function to prevent dry burning of water. - [2:1 pure to drain] The tankless RO water filtration system has a fast& stable water flow of 600 GPD/2,271 L and high hot water flow rate of 0.4 gal/min, and you can fill a cup of water within seconds. This RO water filter system has low drain ratio of 2:1, which saves water efficiently. - [Safe and Reliable Materials] The smart faucet of the water filter system KJ600/K6 is made with a stainless steel bright nickel plating process and has the properties of color change resistance, oxidation resistance and low allergy. The upgraded Teflon tube is resistant to high temperatures up to 500℉/260°C, and has the advantages of corrosion resistance, pressure and wear resistance, aging resistance, low permeability, etc. - After the system is installed for the first time and is flushed, please manually turn on the heating module for temperature setting. In a flushing status, the heating indicator is not available. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BLRHSRR8 | | Benefits | Reduces TDS | | Best Sellers Rank | 271,463 in DIY & Tools ( See Top 100 in DIY & Tools ) 177 in Under-Sink Filters | | Brand Name | Waterdrop | | Customer Reviews | 4.6 4.6 out of 5 stars (192) | | Included Components | RO system, All-in-one filter, Smart faucet | | Item Weight | 15.65 Kilograms | | Manufacturer | Waterdrop | | Manufacturer Part Number | WD-KJ600 | | Material Type | KJF Filter: Reverse Osmosis Membrane & Carbon Block & PP Cotton | | Model Number | WD-K6 | | Number of Items | 1 | | Set Name | wd-k6 | | Unit Count | 1.0 count | ## Product Details - **Brand:** Waterdrop - **Item weight:** 15.65 Kilograms - **Material:** KJF Filter: Reverse Osmosis Membrane & Carbon Block & PP Cotton - **Product benefits:** Reduces TDS - **Set Name:** wd-k6 ## Images ![Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6 - Image 1](https://m.media-amazon.com/images/I/61SsswDJiNL.jpg) ![Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6 - Image 2](https://m.media-amazon.com/images/I/71To3LN8+wL.jpg) ![Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6 - Image 3](https://m.media-amazon.com/images/I/71OLj-awX6L.jpg) ![Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6 - Image 4](https://m.media-amazon.com/images/I/81IZwD4GoUL.jpg) ![Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6 - Image 5](https://m.media-amazon.com/images/I/81874O19cSL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: can someone provide a list of all filters that this uses along with re-mineralization filter and the frequency of replacement required** A: Hi, Thank you for contacting us. 　 This product is only compatible with the composite filter element that comes with it, and it is recommended that you replace it every 12 months. If you have any other questions, please feel free to contact us. Enjoy the rest of your day! Kind Regards Mia Lauren　 Customer Service Rep **Q: What size hole do you need to drill on your worktop counter for the tap to fit correctly ?** A: Hi, Good day, Thanks for your interest in our product. You may need to drill a 1'' hole for the faucet. By means of a smart display faucet of the ro system, the TDS level and the filter condition are available at a glance. The smart display faucet also has functions of child lock and water dispensing temperature indication to avoid scalding risks and ensure safety during use. The reverse osmosis water filtration system allows temperature adjustment, bringing smart and convenient life experience. Please feel free to contact us if you need further assistance. Kind Regards Mia Lauren　 Customer Service Rep **Q: Hello - seeing a few posts about the noise of this product. Can you please confirm when the noise occurs. Is it just when using hot water or constant?** A: Hi, Thank you for contacting us and for your interest in our RO system. Please rest assured that we have improved the design of this RO system and the noise problem has been solved. If you have any questions about using this system, please don't hesitate to contact us. Our support team will give you a satisfactory solution. Enjoy the rest of your day! Kind Regards Mia Lauren　 Customer Service Rep **Q: Does this come with the filter? And what is the energy usage per year please?** A: Hi, Thank you for contacting us. 　 Yes, a new filter will come with the new unit. The rated voltage/current is 110-120V/7A. The rated frequency is 60HZ. If you have any other questions, please feel free to contact us. Enjoy the rest of your day! Kind Regards Mia Lauren　 Customer Service Rep ## Customer Reviews ### ⭐⭐⭐⭐⭐ Overall happy, Vender support is responsive, water quality is good, Instant Hot water is useful. *by C***H on 29 December 2025* All in all happy. Instant Filtered hot water is very useful TDS started ~20 & went up to ~50 after ~6 months. A replacement filter returned it to ~15 & rose to ~38 after 11 months. Another issue was E06/E05 errors ~ 20 months in. I contacted Water drop & they agreed to ship a replacement if I paid £90. The replacement came with a new filter so was les than a filter for a new machine. whilst I was miffed at paying £90 the prospect of paying less than a new filter around the time it was due to replaced & getting a new machine made sense. Didn't take long to swap the old for the new. ### ⭐⭐⭐⭐⭐ Great product. *by B***N on 8 December 2025* Easy setup, works great. Filter clean from 240 tap water to 15, but screen on tap show 7. And also before was worse tap water around 340 and result was the same ### ⭐⭐⭐⭐⭐ Amazing product. Outstanding customer service. *by L***N on 29 August 2025* This is the best thing I've ever bought. I know of no other with hot water and reverse osmosis. It looks very slick too. I'll be buying one for xmas for my son who buys bottled water non stop. I did purchase the separate filter to add back essential minerals which the filter may have removed along with the nasties. I had an issue at one point and Doreen in customer services gave excellent service. Thank you. ## Frequently Bought Together - Waterdrop Reverse Osmosis Instant Hot Water RO Filter System, 600 GPD, 2271L, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, WD-KJ600/WD-K6 - iSpring FD15 DI DeIonization Filter RO/Aquarium 10" x 2.5", 1 Count (Pack of 1), White - Waterdrop WD-KJF Filter, Replacement for WD-KJ600/WD-K6 Reverse Osmosis Instant Hot Water Dispenser System --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/539302699-waterdrop-reverse-osmosis-instant-hot-water-ro-filter-system-600](https://www.desertcart.hr/products/539302699-waterdrop-reverse-osmosis-instant-hot-water-ro-filter-system-600) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-27*