---
product_id: 533090580
title: "Waterdrop KJ600 Instant Hot Reverse Osmosis System, 600 GPD, Tankless RO"
brand: "waterdrop"
price: "₨29527"
currency: SCR
in_stock: true
reviews_count: 13
category: "Waterdrop"
url: https://www.desertcart.sc/products/533090580-waterdrop-kj600-instant-hot-reverse-osmosis-system-600-gpd-tankless
store_origin: SC
region: Seychelles
---

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

**Brand:** waterdrop
**Price:** ₨29527
**Availability:** ✅ In Stock

## Summary

> 💧 Hot, Cold & Pure — The Future of Instant Water is Here!

## Quick Answers

- **What is this?** Waterdrop KJ600 Instant Hot Reverse Osmosis System, 600 GPD, Tankless RO by waterdrop
- **How much does it cost?** ₨29527 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/533090580-waterdrop-kj600-instant-hot-reverse-osmosis-system-600-gpd-tankless)

## 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 built to last and resist corrosion.
- • **Advanced 5-Stage Filtration:** Deeply removes TDS, PFAS, fluoride, heavy metals, and more for crystal-clear, healthy hydration.
- • **Ultra-Efficient 600 GPD Flow:** Tankless design delivers a rapid 0.4 gallons per minute with a water-saving 2:1 pure-to-drain ratio.
- • **Smart LED Faucet with Safety Lock:** Real-time TDS & filter status display plus child lock and scald protection for peace of mind.
- • **Instant Hot & Cold Water On Demand:** Adjust temperature from 104℉ to 203℉ for perfect coffee, tea, or cooking—no waiting, no hassle.

## 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 durable materials make it a premium choice for modern kitchens seeking convenience, health, and sustainability.

## 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: Awesome RO Hot/Cold Water That Works on Highly Mineralized Well Water - I am on well water, and I have a very expensive whole house filter, scale remover, and silver bio filter. The well water at the sink still tastes bad, so I added a large flow water filter under the sink. This feeds both an instant hot water system and the sink faucet. Even with this double filter system, both the hot water and sink water tasted bad. The refrigerator ice maker on the other side of the kitchen was also having issues with its built-in filter because as the ice sublimated, it would leave a white powder residue behind, and the ice/water tasted bad as well. As the ice melted in your drink, one could see little white particulates at the bottom of the glass. So, all drinking water was bad, and I resorted to using 5-gallon filtered water on a cooler. There had to be a better solution. I am a hot tea drinker, and I wanted clean good tasting water from my well and stop having to buy the expensive 5-gallon water jugs at the store. So, I bought the Waterdrop 600GPD hot/cold water RO filter dispenser to go under the sink. I installed the Waterdrop and left the large flow filter that I installed earlier to filter the large sink faucet water. I was a little worried about the water pressure now having three filters in series and had a concern whether the 600GPD Waterdrop filter had a sufficient flow rate. My well runs at 75psi, but it has a large 3hp 3-phase AC pump that has at least a 29 GPM flow rate. I followed the Waterdrop filter install instructions and let it do its 15-minute flush. Then I tasted both the room temp and the hot water from the Waterdrop RO system. The glass surprisingly filled quickly. It only took a few seconds to fill the glass. Even with two filters in front of this third RO filter. What a success! Finally, I have pure water with no after taste and no particulates! When I opened the under-sink fill valve for the first time and sent water to this filter, the hot water took a few moments to preheat, but after this pre-heat, the hot water was instant. I have my temp set to 203 degrees F. I also disable the hot water child safety feature on the faucet head by touching the safety control and holding for about 6 seconds. You will hear a beep at about 2 seconds telling you that you can now touch the hot dispenser control and if you keep holding for about 3-4 seconds longer, the safety control will turn off and you can now get instant hot water by just touching only the hot dispenser control. I did have an issue with the Waterdrop faucet display being very hard to see. The display on the main under sink unit was fine, but the faucet display had an issue. Instead of sending the unit back through desertcart, I elected to contact the manufacturer directly by email. Their customer service responded the very next day. They asked for a few photos, and I asked them via email, could I just get a new faucet head only since I did not want to uninstall the whole system and ship back with water in it. One day later they responded that they would ship at their cost a new faucet head with a good display. Each day they checked in on me via email to see if I was having any issues installing the new faucet. They were very nice the whole time. I got the new faucet unit and all is awesome now. Their customer service by email was fantastic. They checked in on me almost every day and were patient with me and gave me time to install the new unit without closing the service ticket. They never abandoned me. They even checked in on me for over two weeks after I had told them I was successful with the replacement faucet install just to make sure I had time to use the unit and see if any issues surfaced. The unit is working very well. The email service people are just fantastic! So, all is well and both hot and cold water is fantastic. Crystal clear and no foul after-taste. I most certainly could remove the second under sink filter I have in front of this unit, and I may do that, but my water flow is fast, and everything is awesome and working well. Great clear water. Finally!!! Another few topics for DIY people... If you do not use the dispenser for 48 hours, the Waterdrop hot water filter will go into standby mode to save power. I use it every day, so I have no problem with a delay. There have been a few times I did not use the unit for a few days, and I had to wait for it to come up to temp, but it was a short couple of minutes. No big deal at all. The faucet display will inform you if it is pre-heating, so you don't panic about what is going wrong. The faucet display shows everything you need...temp, TDS, what is running (cold or hot) and it also has the up/down temp settings where you can easily adjust the temp. You do NOT have to keep touching the contact for hot or cold-water flow. Just touch until you hear a beep and let go. The water will keep running and when you want it to stop, simply touch the contact again. This is a great feature if you are filling large containers with either hot or cold water. Just sit the container in the sink and fill completely hands off. The following is a tip on how to better install the faucet water lines to the under-sink base unit. I have a very deep sink and only have a few inches clearance between the top of this unit and the sink bottom. This unit has a supply, hot and cold faucet lines, and a wastewater line attaching to the “top” of the under-sink system instead of the back or sides. That really is a tight fit and requires the water lines to bend 90 degrees within a few inches. The following is a must do to prevent damage or leaks…I bought what they call “90-degree bend guides” for ¼-inch and 3/8-inch push-in tubing to prevent the lines from kinking. (Waterdrop, you might want to include three ¼-inch and one 3/8-inch bend guides in your install kit.) I will include the pictures below. One can buy the bend guides on desertcart for a few bucks, and you just snap in the tubing at one end and walk up the tubing with your fingers and push the tubing into the bend guide as you go. Now you have a 90-degree bend in your three ¼-tubing (wastewater, hot water, cold water) and you will also need one 90-degree bend guide for the 3/8-inch supply tube. Now your under-sink unit will fit nicely under your sink and never kink the tubing especially if you need to pull the base unit out from under the sink or rearrange its position. Now a quick story about how I used a Waterdrop filter on my refrigerator… I loved the hot/cold Waterdrop unit on my kitchen island sink so well, I have bought another Waterdrop basic 600GPD (without electronic controls on the faucet…this is extremely important to make this work with your refrigerator ice-maker/water dispenser) and hooked it up directly to my refrigerator which is against a wall with a bathroom sink on the other side to provide service for the waste water. Now I have crystal clear ice and cold drinking water. I had wrongly bought a refrigerator filter bypass/plug since this new Waterdrop RO filter is all I needed but learned that most new refrigerators have a built-in bypass and do not require a plug. You simply unscrew the filter from the refrigerator and just close the housing cover. Now I do not need to keep replacing my refrigerator filter. Those are expensive and are not required when you directly hook these Waterdrop filters in-line with the fridge. The refrigerator filter will also drop your water pressure too low to reasonably fill the ice maker or dispense water. I will say this important fact again…I bought a basic 600GPD Waterdrop filter with a simple “non-electronic” faucet because when you directly hook up the filter to the fridge, the electronic faucet with dispensing controls is not compatible! The simple non electronic Waterdrop faucet design allows the fridge icemaker and water dispenser to automatically work because the base unit will automatically work on just a pressure drop, not an electronic control. For those who want the Waterdrop filter to service the refrigerator and a basic non-electronic faucet to fill up large 5-gal jugs for a water cooler…You could tee off the Waterdrop filter output, one line to the fridge and one line to the basic non-electronic faucet. On my setup, I do not use a faucet but instead use a tube with a valve at the end and make it with the tube sticking through a cap that fits over a 5-gallon jug top. That way I do not have to hold the tube and I can more easily turn the valve off when the jug is full. After installing and flushing your Waterdrop RO filter, I would recommend throwing away all the old refrigerator ice and the first few new ice drops as well. Overall, I would rate the Waterdrop filters a 5-star, and I will gladly give the Waterdrop email customer service a 5-star as well. As of writing this review, the email service department periodically still checks in with me to see if all is well. That deserves an extra star, and I wrote back to the service department thanking them several times.
Review: No Hot Water after Filter Change - I was and still am a most satisfied customer. The system worked beautifully for a year when it indicated that it needed to change the filter. I changed the filter, and flushing and priming happened automatically all on its own. This was wonderful. Automated after-filter change routine that worked!! The system worked for a few days, then something happened: The system all of a sudden behaved as if it were unplugged; there are no indicator lights on the faucet or the main unit. While it still dispenses water, it only dispenses cold water regardless of whether the cold or hot water button is pressed. During dispensing, the cold water button on the faucet blinks, and the blue KJF filter light on the main unit illuminates momentarily. So naturally, I emailed the customer support. They were very polite, however, likely because they were trained that way. Their instructions and diagnosis of the technical problem were the worst I have ever experienced. After a long email thread, they started repeating the instructions and diagnosis. Other ather words, they did not review previous communication. Utterly frustrating, meaningless, and a waste of time. If the support team had bothered to ask technicians, the support would have been quick and meaningful. I started giving them a summary of past communications to break the endless cycle of the same opinion and diagnosis. Finally, they decided to turn this over to a technician after over a week-long exchange and over 10 emails later. A day later, they emailed me that the technician said the system was going through a "rinsing cycle", based on the video I sent them at the beginning of all this. And instructed me to let the cold water run, and after the cycle is complete, the heater would turn on. They did not say how long it would take to complete the cycle or whether it would stop dispensing water automatically. I had to ask Gemini AI, and it said the cycle would be 5 to 10 minutes and it would stop automatically. So, with the customer's/technician's support and AI help, I was able to complete the "rinsing cycle," and the heater came back online. I did not expect it needed a "rinsing cycle", which is essentially flushing and priming, after successful flushing and resetting. I do love this product and what it does for me. I love the automatic routines after a filter change. This is a well-designed and extremely convenient product for me. But contacting customer support is not something I wish to repeat. I do not know how many stars to give to this product: 5 stars for the system performance and less than 1 star for their customer support. I would ask AI first next time the system fails instead of contacting the support team.

## 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 | #21,896 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #43 in Under-Sink & Countertop Filtration |
| Brand | Waterdrop |
| Brand Name | Waterdrop |
| Capacity | 600 gallons |
| Container Type | Dispenser |
| Customer Reviews | 4.4 out of 5 stars 726 Reviews |
| Filter Life Cycle | 12 months |
| Included Components | KJ600 RO System (with 1 Pre-installed Filter), Smart Display 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 Highlight | NSF/ANSI 372 Certified, 5-Stage Filtration, PFAS & TDS Reduction, 2:1 Pure to Drain, LED Faucet, Hot and Cold Water Dispenser |
| 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:** 600 gallons
- **Included Components:** KJ600 RO System (with 1 Pre-installed Filter), Smart Display 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

![Waterdrop 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** 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

### ⭐⭐⭐⭐⭐ Awesome RO Hot/Cold Water That Works on Highly Mineralized Well Water
*by T***M on July 25, 2025*

I am on well water, and I have a very expensive whole house filter, scale remover, and silver bio filter. The well water at the sink still tastes bad, so I added a large flow water filter under the sink. This feeds both an instant hot water system and the sink faucet. Even with this double filter system, both the hot water and sink water tasted bad. The refrigerator ice maker on the other side of the kitchen was also having issues with its built-in filter because as the ice sublimated, it would leave a white powder residue behind, and the ice/water tasted bad as well. As the ice melted in your drink, one could see little white particulates at the bottom of the glass. So, all drinking water was bad, and I resorted to using 5-gallon filtered water on a cooler. There had to be a better solution. I am a hot tea drinker, and I wanted clean good tasting water from my well and stop having to buy the expensive 5-gallon water jugs at the store. So, I bought the Waterdrop 600GPD hot/cold water RO filter dispenser to go under the sink. I installed the Waterdrop and left the large flow filter that I installed earlier to filter the large sink faucet water. I was a little worried about the water pressure now having three filters in series and had a concern whether the 600GPD Waterdrop filter had a sufficient flow rate. My well runs at 75psi, but it has a large 3hp 3-phase AC pump that has at least a 29 GPM flow rate. I followed the Waterdrop filter install instructions and let it do its 15-minute flush. Then I tasted both the room temp and the hot water from the Waterdrop RO system. The glass surprisingly filled quickly. It only took a few seconds to fill the glass. Even with two filters in front of this third RO filter. What a success! Finally, I have pure water with no after taste and no particulates! When I opened the under-sink fill valve for the first time and sent water to this filter, the hot water took a few moments to preheat, but after this pre-heat, the hot water was instant. I have my temp set to 203 degrees F. I also disable the hot water child safety feature on the faucet head by touching the safety control and holding for about 6 seconds. You will hear a beep at about 2 seconds telling you that you can now touch the hot dispenser control and if you keep holding for about 3-4 seconds longer, the safety control will turn off and you can now get instant hot water by just touching only the hot dispenser control. I did have an issue with the Waterdrop faucet display being very hard to see. The display on the main under sink unit was fine, but the faucet display had an issue. Instead of sending the unit back through Amazon, I elected to contact the manufacturer directly by email. Their customer service responded the very next day. They asked for a few photos, and I asked them via email, could I just get a new faucet head only since I did not want to uninstall the whole system and ship back with water in it. One day later they responded that they would ship at their cost a new faucet head with a good display. Each day they checked in on me via email to see if I was having any issues installing the new faucet. They were very nice the whole time. I got the new faucet unit and all is awesome now. Their customer service by email was fantastic. They checked in on me almost every day and were patient with me and gave me time to install the new unit without closing the service ticket. They never abandoned me. They even checked in on me for over two weeks after I had told them I was successful with the replacement faucet install just to make sure I had time to use the unit and see if any issues surfaced. The unit is working very well. The email service people are just fantastic! So, all is well and both hot and cold water is fantastic. Crystal clear and no foul after-taste. I most certainly could remove the second under sink filter I have in front of this unit, and I may do that, but my water flow is fast, and everything is awesome and working well. Great clear water. Finally!!! Another few topics for DIY people... If you do not use the dispenser for 48 hours, the Waterdrop hot water filter will go into standby mode to save power. I use it every day, so I have no problem with a delay. There have been a few times I did not use the unit for a few days, and I had to wait for it to come up to temp, but it was a short couple of minutes. No big deal at all. The faucet display will inform you if it is pre-heating, so you don't panic about what is going wrong. The faucet display shows everything you need...temp, TDS, what is running (cold or hot) and it also has the up/down temp settings where you can easily adjust the temp. You do NOT have to keep touching the contact for hot or cold-water flow. Just touch until you hear a beep and let go. The water will keep running and when you want it to stop, simply touch the contact again. This is a great feature if you are filling large containers with either hot or cold water. Just sit the container in the sink and fill completely hands off. The following is a tip on how to better install the faucet water lines to the under-sink base unit. I have a very deep sink and only have a few inches clearance between the top of this unit and the sink bottom. This unit has a supply, hot and cold faucet lines, and a wastewater line attaching to the “top” of the under-sink system instead of the back or sides. That really is a tight fit and requires the water lines to bend 90 degrees within a few inches. The following is a must do to prevent damage or leaks…I bought what they call “90-degree bend guides” for ¼-inch and 3/8-inch push-in tubing to prevent the lines from kinking. (Waterdrop, you might want to include three ¼-inch and one 3/8-inch bend guides in your install kit.) I will include the pictures below. One can buy the bend guides on amazon for a few bucks, and you just snap in the tubing at one end and walk up the tubing with your fingers and push the tubing into the bend guide as you go. Now you have a 90-degree bend in your three ¼-tubing (wastewater, hot water, cold water) and you will also need one 90-degree bend guide for the 3/8-inch supply tube. Now your under-sink unit will fit nicely under your sink and never kink the tubing especially if you need to pull the base unit out from under the sink or rearrange its position. Now a quick story about how I used a Waterdrop filter on my refrigerator… I loved the hot/cold Waterdrop unit on my kitchen island sink so well, I have bought another Waterdrop basic 600GPD (without electronic controls on the faucet…this is extremely important to make this work with your refrigerator ice-maker/water dispenser) and hooked it up directly to my refrigerator which is against a wall with a bathroom sink on the other side to provide service for the waste water. Now I have crystal clear ice and cold drinking water. I had wrongly bought a refrigerator filter bypass/plug since this new Waterdrop RO filter is all I needed but learned that most new refrigerators have a built-in bypass and do not require a plug. You simply unscrew the filter from the refrigerator and just close the housing cover. Now I do not need to keep replacing my refrigerator filter. Those are expensive and are not required when you directly hook these Waterdrop filters in-line with the fridge. The refrigerator filter will also drop your water pressure too low to reasonably fill the ice maker or dispense water. I will say this important fact again…I bought a basic 600GPD Waterdrop filter with a simple “non-electronic” faucet because when you directly hook up the filter to the fridge, the electronic faucet with dispensing controls is not compatible! The simple non electronic Waterdrop faucet design allows the fridge icemaker and water dispenser to automatically work because the base unit will automatically work on just a pressure drop, not an electronic control. For those who want the Waterdrop filter to service the refrigerator and a basic non-electronic faucet to fill up large 5-gal jugs for a water cooler…You could tee off the Waterdrop filter output, one line to the fridge and one line to the basic non-electronic faucet. On my setup, I do not use a faucet but instead use a tube with a valve at the end and make it with the tube sticking through a cap that fits over a 5-gallon jug top. That way I do not have to hold the tube and I can more easily turn the valve off when the jug is full. After installing and flushing your Waterdrop RO filter, I would recommend throwing away all the old refrigerator ice and the first few new ice drops as well. Overall, I would rate the Waterdrop filters a 5-star, and I will gladly give the Waterdrop email customer service a 5-star as well. As of writing this review, the email service department periodically still checks in with me to see if all is well. That deserves an extra star, and I wrote back to the service department thanking them several times.

### ⭐⭐⭐⭐⭐ No Hot Water after Filter Change
*by J***K on July 15, 2026*

I was and still am a most satisfied customer. The system worked beautifully for a year when it indicated that it needed to change the filter. I changed the filter, and flushing and priming happened automatically all on its own. This was wonderful. Automated after-filter change routine that worked!! The system worked for a few days, then something happened: The system all of a sudden behaved as if it were unplugged; there are no indicator lights on the faucet or the main unit. While it still dispenses water, it only dispenses cold water regardless of whether the cold or hot water button is pressed. During dispensing, the cold water button on the faucet blinks, and the blue KJF filter light on the main unit illuminates momentarily. So naturally, I emailed the customer support. They were very polite, however, likely because they were trained that way. Their instructions and diagnosis of the technical problem were the worst I have ever experienced. After a long email thread, they started repeating the instructions and diagnosis. Other ather words, they did not review previous communication. Utterly frustrating, meaningless, and a waste of time. If the support team had bothered to ask technicians, the support would have been quick and meaningful. I started giving them a summary of past communications to break the endless cycle of the same opinion and diagnosis. Finally, they decided to turn this over to a technician after over a week-long exchange and over 10 emails later. A day later, they emailed me that the technician said the system was going through a "rinsing cycle", based on the video I sent them at the beginning of all this. And instructed me to let the cold water run, and after the cycle is complete, the heater would turn on. They did not say how long it would take to complete the cycle or whether it would stop dispensing water automatically. I had to ask Gemini AI, and it said the cycle would be 5 to 10 minutes and it would stop automatically. So, with the customer's/technician's support and AI help, I was able to complete the "rinsing cycle," and the heater came back online. I did not expect it needed a "rinsing cycle", which is essentially flushing and priming, after successful flushing and resetting. I do love this product and what it does for me. I love the automatic routines after a filter change. This is a well-designed and extremely convenient product for me. But contacting customer support is not something I wish to repeat. I do not know how many stars to give to this product: 5 stars for the system performance and less than 1 star for their customer support. I would ask AI first next time the system fails instead of contacting the support team.

### ⭐⭐⭐⭐⭐ Excellent RO System with Instant Hot Water
*by L***A on October 1, 2026*

The water tastes clean and fresh, and the instant hot water feature is extremely convenient. Water flow is strong, the system runs quietly, and the tankless design saves a lot of space under the sink. Expensive, but the quality and features are worth it.

## 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 Seychelles*
*Store origin: SC*
*Last updated: 2026-10-12*