---
product_id: 533090580
title: "KJ600 Instant Hot Reverse Osmosis System, 600 GPD, Tankless RO"
brand: "waterdrop"
price: "5012.90 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Waterdrop"
url: https://www.desertcart.tn/products/533090580-kj600-instant-hot-reverse-osmosis-system-600-gpd-tankless-ro
store_origin: TN
region: Tunisia
---

# 600 GPD fast & stable flow Instant hot water up to 203℉ 5-stage deep filtration KJ600 Instant Hot Reverse Osmosis System, 600 GPD, Tankless RO

**Brand:** waterdrop
**Price:** 5012.90 DT
**Availability:** ✅ In Stock

## Summary

> 💧 Hot, cold, pure—water that works as hard as you do.

## Quick Answers

- **What is this?** KJ600 Instant Hot Reverse Osmosis System, 600 GPD, Tankless RO by waterdrop
- **How much does it cost?** 5012.90 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/533090580-kj600-instant-hot-reverse-osmosis-system-600-gpd-tankless-ro)

## 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 with nickel plating and heat-resistant Teflon tubing ensure longevity and safety in your kitchen.
- • **Advanced 5-Stage Purification:** Eliminate TDS, PFAS, fluoride, heavy metals, and more for crystal-clear, healthy water every time.
- • **Instant Hot & Cold Water On Demand:** Customize your hydration with water from 104℉ to 203℉ in seconds—perfect for coffee, tea, and cooking.
- • **Smart LED Faucet with Safety Features:** Monitor TDS levels and filter status at a glance, plus child lock and scald protection for peace of mind.
- • **Tankless Design with 600 GPD Capacity:** Enjoy a continuous, space-saving water supply with a rapid 0.4 gallons per minute flow rate and efficient 2:1 pure-to-drain ratio.

## Overview

The Waterdrop KJ600 is a cutting-edge tankless reverse osmosis system delivering up to 600 gallons per day of purified water with instant temperature control from 104℉ to 203℉. Featuring a 5-stage filtration process that removes contaminants like PFAS, heavy metals, and fluoride, it combines smart LED faucet technology with safety features such as child lock and scald protection. Its efficient 2:1 pure-to-drain ratio and premium materials make it a sleek, reliable upgrade for any modern kitchen.

## Description

Waterdrop KJ600 Instant Hot Reverse Osmosis System, 600 GPD, Tankless RO | NSF/ANSI 372 Certified, 5-Stage Filtration, PFAS & TDS Reduction, 2:1 Pure to Drain, LED Faucet, Hot and Cold Water Dispenser - desertcart.com

Review: Great RO System with Outstanding After-Sales Support - I've owned the Waterdrop K6/KJ600 under sink reverse osmosis system with instant hot water for about two years, and it has been one of the best upgrades I've made to my kitchen. The water tastes exceptionally clean, having instant hot water for tea, coffee, oatmeal, and cooking is incredibly convenient. The system has been reliable, and the filter replacement process is quick and straightforward. After nearly two years of ownership, I experienced an issue and contacted Waterdrop Customer Service. That's where Becky C made all the difference. Becky was responsive, professional, and genuinely committed to helping me. She communicated clearly throughout the entire process, kept me updated, and worked quickly to resolve my issue. It's rare to find customer service that is this attentive and easy to work with, and I truly appreciated her dedication. Any product can experience an issue over time. What really matters is how a company stands behind its products, and my experience with Waterdrop gave me confidence that they do. Thank you, Becky, for providing outstanding customer service and making what could have been a frustrating situation into a positive experience. Between the quality of the K6 system and the excellent support I received, I would confidently recommend Waterdrop to anyone looking for a premium under sink reverse osmosis system with instant hot water.
Review: Wonderful - Ease of installation, everything is labeled, colored and easy to do. The only down side was that it is large, and in order for me to fit it under the sink, I had to remove the garbage disposal first. Not difficult, just one additional step. One item that is a little confusing is the initial turn on step and like most filters, you have to let it run for a certain amount of time, or certain amount of water. The directions made it seem that it would do this on its own, once the startup was initiated. In order to fill the filter though, you still have to turn on the cold water and let it run for a while in order to flush and fill the filter. Then it will allow you to set the hot water temperature. It works great, water is hot as you need it, and it tastes great, or should I say, it doesn’t taste like anything.

## Features

- [First-to-market RO system with heating function] The KJ600 instant hot water dispenser reverse osmosis system can dispense both cold water and hot water to meet your different demands. Adjust the temperature as you wish in the range of 104℉-203℉. 5-stage deep filtration, can effectively reduce TDS, PFOA, PFOS, fluoride, arsenic, nitrate, lead and mercury
- [First-to-market RO system with heating function] The KJ600 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 allows you to adjust the temperature as you wish in the range of 104℉-203℉, 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, PFOA, PFOS, fluoride, arsenic, nitrate, lead and mercury through fine filtration layer by layer to achieve deep purification, ensuring every drop is purified 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 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 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 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.
- [MNR Filter Compatibility] The system can be connected with an MNR remineralization filter for use, but the MNR filter can only be connected to a cold water pipe. The system cannot be connected with a refrigerator or an ice maker
- [Preset Heating and Scald Protection] Please set desired temperature in advance. When the dispenser starts heating, you can get hot water directly without waiting. There can be external factors that will ultimately affect the temperature of water, including weather, temperature of cup. Hot steam of the tank is drained from the drain pipe, and the system is designed with anti-scalding cotton to avoid scalding

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BKPMMW1H |
| Best Sellers Rank | #31,866 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #59 in Under-Sink & Countertop Filtration |
| Brand | Waterdrop |
| Brand Name | Waterdrop |
| Capacity | 1600 gallons |
| Container Type | Dispenser |
| Customer Reviews | 4.3 out of 5 stars 712 Reviews |
| Included Components | KJ600 RO System, Replacement Filters, Smart Faucet, User Manual |
| Installation Type | Under Sink |
| Item Dimensions L x W x H | 17.5"L x 6.7"W x 16.6"H |
| Item Type Name | hot-water-only-dispensers |
| LowerTemperature Range | 104 °F |
| Manufacturer | Waterdrop |
| Material | Reverse Osmosis Membrane & Carbon Block & PP Cotton |
| Material Type | Reverse Osmosis Membrane & Carbon Block & PP Cotton |
| Maximum Flow Rate | 0.4 gpm |
| Model Name | WD-KJ600 |
| Model Number | WD-KJ600 |
| Number of Items | 1 |
| Operating Pressure Range | 14.5-87 psi |
| Other Special Features of the Product | 5-stage deep filtration, Dispense both cold water and hot water to meet your different demands, Fast& stable water flow of 600 GPD and 2:1 pure to drain, It takes some time to heat water in the tank to the preset temperature, and it takes about 15 minutes to heat water from the room temperature to 203℉. |
| Part Number | WD-KJ600 |
| Power Source | Corded Electric |
| Product Dimensions | 17.5"L x 6.7"W x 16.6"H |
| Purification Method | Reverse Osmosis |
| Special Feature | 5-stage deep filtration, Dispense both cold water and hot water to meet your different demands, Fast& stable water flow of 600 GPD and 2:1 pure to drain, It takes some time to heat water in the tank to the preset temperature, and it takes about 15 minutes to heat water from the room temperature to 203℉. Special Feature 5-stage deep filtration, Dispense both cold water and hot water to meet your different demands, Fast& stable water flow of 600 GPD and 2:1 pure to drain, It takes some time to heat water in the tank to the preset temperature, and it takes about 15 minutes to heat water from the room temperature to 203℉. See more |
| Supported Water TDS Level Maximum (PPM) | 2000 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 203 °F |
| Warranty Description | 1 year manufacturer and Seller Combination |

## Product Details

- **Brand:** Waterdrop
- **Capacity:** 1600 gallons
- **Included Components:** KJ600 RO System, Replacement Filters, Smart Faucet, User Manual
- **Installation Type:** Under Sink
- **Material:** Reverse Osmosis Membrane & Carbon Block & PP Cotton
- **Package Information:** Dispenser
- **Power Source:** Corded Electric
- **Product Dimensions:** 17.5"L x 6.7"W x 16.6"H
- **Purification Method:** Reverse Osmosis

## Images

![KJ600 Instant Hot Reverse Osmosis System, 600 GPD, Tankless RO - Image 1](https://m.media-amazon.com/images/I/61TounyUzaL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: If the reverse osmosis system is not heating up?**
A: Please check if the heating button on ro system is lit. If not, press and hold the heating button for 3 seconds to activate the heating mode. Tips: If the RO has not been used for 48h, the heating mode may sleep for safety and power saving reasons.

**Q: If the reverse osmosis system is heating up but cannot reach the preset temperature?**
A: When drawing water multiple times, it takes some time to heat water. Heating button will turn white once the set temperature is reached. (Maximum waiting time is 15 min) Tips: You can set temperature in advance to obtain hot water without waiting.

**Q: Can the WD-KJ600 reverse osmosis system be connected to the MNR35 remineralization filter?**
A: Yes, the ro system can be connected to the MNR filter, but the MNR filter can only be connected to cold water pipe. Tips: The WD-KJ600 ro system cannot be connected to refrigerator or ice maker.

**Q: Will there be hot steam under the sink when the machine starts heating?**
A: The hot steam from the water tank will be directly discharged from the drain pipe, and the system is designed with a thermal insulation cotton to prevent scalding.

**Q: The current of the WD-KJ600 reverse osmosis system?**
A: The current of our ro system is 7A. For safety reasons, it is recommended to provide a separate socket for the instant hot water dispenser.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great RO System with Outstanding After-Sales Support
*by K***C on July 6, 2026*

I've owned the Waterdrop K6/KJ600 under sink reverse osmosis system with instant hot water for about two years, and it has been one of the best upgrades I've made to my kitchen. The water tastes exceptionally clean, having instant hot water for tea, coffee, oatmeal, and cooking is incredibly convenient. The system has been reliable, and the filter replacement process is quick and straightforward. After nearly two years of ownership, I experienced an issue and contacted Waterdrop Customer Service. That's where Becky C made all the difference. Becky was responsive, professional, and genuinely committed to helping me. She communicated clearly throughout the entire process, kept me updated, and worked quickly to resolve my issue. It's rare to find customer service that is this attentive and easy to work with, and I truly appreciated her dedication. Any product can experience an issue over time. What really matters is how a company stands behind its products, and my experience with Waterdrop gave me confidence that they do. Thank you, Becky, for providing outstanding customer service and making what could have been a frustrating situation into a positive experience. Between the quality of the K6 system and the excellent support I received, I would confidently recommend Waterdrop to anyone looking for a premium under sink reverse osmosis system with instant hot water.

### ⭐⭐⭐⭐⭐ Wonderful
*by D***E on July 27, 2026*

Ease of installation, everything is labeled, colored and easy to do. The only down side was that it is large, and in order for me to fit it under the sink, I had to remove the garbage disposal first. Not difficult, just one additional step. One item that is a little confusing is the initial turn on step and like most filters, you have to let it run for a certain amount of time, or certain amount of water. The directions made it seem that it would do this on its own, once the startup was initiated. In order to fill the filter though, you still have to turn on the cold water and let it run for a while in order to flush and fill the filter. Then it will allow you to set the hot water temperature. It works great, water is hot as you need it, and it tastes great, or should I say, it doesn’t taste like anything.

### ⭐⭐⭐⭐⭐ Replaced the kettle with no regrets after 2 months of use
*by G***E on February 16, 2023*

I've been seeing articles about microplastics in our drinking water supply for several years, and then I saw a paper about them being able to cross the blood brain barrier. No idea if that passed peer review, but if it was correct it seemed unlikely that micro-plastics in the brain would give me super powers, and a more likely speculation that longitudinal studies will show something like a dementia risk. So... RO filter. I've no affiliation with the company beyond appreciating their product enough to write a very rare Amazon review. There is very limited counter space available, so I was looking for an under-counter unit. The kettle was also starting to fail so I went looking to see if there was a filter that integrated a hot water option to reclaim additional counter space. This was the only unit on the market at the time. Did a bunch of additional background reading around standards specifications and came away content that it'd be fit for purpose. Although if you want to hook it up in-front of a fridge icemaker or similar this isn't the unit for you. This unit isn't cheap and I did look at a water fountain with subscription as an alternative. The subscription looked very slightly more expensive yearly than filter replacement, but without the substantial up front cost. However storage space is a premium for me and I cannot afford the space for the cache of water a fountain requires, nor the footprint of the fountain. I called around looking for plumber quotes for just the install if I supplied the unit, and they came back in the $1k+ range. Okay, how hard can this be for self-install? (FYI I did look at drilling a new hole into the stainless steel sink, but luckily could avoid it through purchase of a different faucet. If you go down the drilling path, look at tips to avoid "work hardening". Plumbers can be worth the cost because they know this stuff without expensive and difficult to correct "learning experiences".) Ordered it, it arrived, seems I needed to order more stuff. This was entirely on me, but as a service to amateur self-installers there could be a "things to look for " section in the product doc. I'll put links to the additional purchases. To avoid having to cut and weld copper, I replaced the existing faucet with one that had flexible braided hose instead of rigid metal. To avoid back siphoning and comply with local code I switched the existing air gap for the dishwasher with a dual intake one. This sits between the dishwasher/ROfilter and the waste line. Because I was moving from a faucet with a wide base to a small base, exposing one of the sink's pre-cut holes, I filled that with an under sink dish soap dispenser. Final enhancement was a remineralization filter on the cold output as, if this is a primary source of hydration, you don't want your drinking water causing necessary dissolved minerals to osmose out of your cells. The unit was easy to install... although I had to return the first one due to it failing to complete initial self-checks. The swap was incredibly smooth - their support had a replacement unit on the way the same evening after I described symptoms, the checks I'd done for free-flow of water, and sent photo/video. IIRC the replacement unit arrived a day later, I slapped a return label on the original and was done. I'm noting this because good support of products is a massive positive differentiator for me when they're sealed systems. Install: The install was simple. The hoses are all push fit and, so long as you apply the little retainer clips, no leaking at all after installation. I did diverge from their install instructions regarding the waste water line - that was a push fit into the air gap instead of drilling a small hole into the sink waste line. Use: The water comes out _almost_ boiling. You do have to run it for a second or two to flush the cool water in the pipes if you want it for tea, but if you do it is definitely sufficiently hot for tea and coffee. The temperature read-out on the faucet tells you when you're good to go. In terms of volume, I've not run out when pulling 3-4 cups at a time for cooking rice/pasta/etc. In fact I've not run out of hot water when I've needed it, but your usage patterns will dictate whether this is a viable total kettle replacement for you. When first using it I did wish for more tactile feedback on the top of the filter faucet - I'm watching a stream of boiling water near my fingers like a hawk, so looking away to find the "off" button on a completely smooth touch surface was... uncomfortable. After a short adjustment I'm now able to turn it off without looking away from the water so it's not a lasting issue, just a learning curve. There is noise when it's in operation, but it's pretty muted just by thin, un-insulated wood panel cupboard doors. My sleeping area is a loft above the kitchen space, and I'm a light sleeper, but this is not enough to disturb me. I was adjusting the temperature of the hot water down before bed, then up again before morning routine to reduce energy expenditure, but have given up on that. This shares a power meter with the dishwasher so I don't have isolated reading. Looking at it, it's currently drawing 2.2w. It's 06:18, I've had 1 coffee, and it's drawn 0.14kWh total since midnight. I've never bothered to adjust the temperature from maximum after initial experimentation. This isn't a kettle, and if you adjust the setting it does take time for the temperature to ramp up, which is not suited to my primary use of hot drinks. I want waster very hot and without delay. I've no idea how long it takes the temp to drop, but given power draw I have to assume decent insulation and therefore quite some time. I do wish I could set the temperature display to Celsius, but it's sold in the US so that's a very minor critique. I would have liked some average power consumption figures in their product docs for X liters of cold, Y of hot per day but after observation power consumption is low enough for me to ignore. The only reason I've put this as room for improvement is that for the very energy conscious this would benefit from a small zigbee controller between faucet and filter that allowed adjustment of temperature on a schedule. I agree with their design choice _not_ to clutter the filter faucet with controls for such a setting. I've not had this for long enough yet to be able to comment on filter life/replacement. Not affiliated with any of these sellers either. airgap: https://www.amazon.com/gp/product/B092RFBTXK/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&th=1 faucet: https://www.amazon.com/gp/product/B092VQTNW1/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 soap: https://www.amazon.com/gp/product/B018WUPCRA/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 additional push-fit host: https://www.amazon.com/gp/product/B08619RF3G/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 remineralization: https://www.amazon.com/gp/product/B08DXYL81C/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

## Frequently Bought Together

- Waterdrop Reverse Osmosis System, Instant Hot Water Dispenser, 600 GPD, Reduce PFAS, Tankless, 2:1 Pure to Drain, Under Sink, TDS Reduction, Smart LED Faucet, Hot and Cold Water Dispenser Faucet
- Waterdrop Remineralization Under Sink Water Filtration, 1/4” Quick Connect Post Filter for RO Reverse Osmosis Filter System, Restore Essential Minerals
- Waterdrop WD-KJF Filter, Replacement for WD-KJ600 Reverse Osmosis Instant Hot Water Dispenser System, 12-month Lifetime

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-09*