- [Innovative Purified & Hot Water] Waterdrop K6 is the 1st RO system with heating function, delivering both purified & hot water in one unit.
- [High Capacity & Flow Rate] With 600 GPD capacity hot water flow rate, K6 exceeds traditional under-sink RO water purifiers, meeting your needs for water purification & hot water.
- [Instant Hot Water On-Demand] Get instant hot water (104℉-203℉) with Waterdrop K6! Perfect for cooking soup, making coffee/tea/oatmeal, and more.
- [Deep Filtration for Pure Water] The 5-in-1 filter is built with an RO membrane, a carbon block, PP cotton and other filtration substances and can effectively filter out 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, ensuring every drop is purified water.See WD-K6 RO system test results for more.
- [Smart Display Faucet] The high-end faucet displays TDS level & filter condition, with temperature adjustment at your fingertips for a smart & convenient life experience.
- [Safety First] K6 automatically monitors water purification & includes child lock & water dispensing temperature indication features to avoid scalding risks. Built-in flowmeter, NTC & heating overtime protection function prevent dry burning.
- [Maintenance-Free Operation] K6 prevents limescale formation inside, reducing the hassle of liner cleaning for long-lasting operation.
Reverse Osmosis Instant Hot Water Dispenser System - Waterdrop K6
Model number
WD-K6-W(Also named as WD-KJ-600)
Product dimensions
18 x 17 x 7 inches
Item weight
33.06 pounds
Maximum daily capacity
600 GPD
Feed water pressure
14.5-87 psi/0.1-0.6MPa
Feed water temperature
41-100°F/5-38°C
Hot water temperature
104-203°F/40-95°C
Faucet
Smart LED faucet
Feed Water Requirement
Municipal tap water
Faucet appearance
Brushed nickel
In the box
System*1, Feed water adapter 3/8”-1/2”*1 and Inlet water tubing*60”, Pure water tubing*60”, Hot water tubing*60”, Smart faucet*1, Drain water tubing*60”, Lock clip*6, Drain saddle*1, Teflon tape*1
Can the system be connected with an MNR remineralization filter for use?
Can the system be connected with a UV water sterilizer?
Can the K6 system be connected to a refrigerator or an ice maker?
Does Waterdrop K6 instant hot Reverse osmosis system waste a lot of water?
How often should I change reverse osmosis instant hot water filters?
Is it convenient to replace the filter of Waterdrop K6 instant hot Reverse osmosis system?
Can this system use my own faucet?
What size hole would I need to drill to install the faucet in my sink?
Is Waterdrop K6 instant hot Reverse osmosis system noisy?
Can I immediately get hot water after setting the temperature?
How do I start the heating function to get hot water after installing the system?
Can I turn off the heating module when heating is not required?
How many modes of heating temperatures can I set?
Is Waterdrop K6 instant hot Reverse osmosis system safe?















- Adaptive to Waterdrop K6-W&KJ-600 Instant Hot RO System
- provides up to 12 months or 1,600 gallons of healthy water for you and your family.

- An excellent add-on Remineralization filter adopts 18 natural materials to restore minerals.
- Saves 8300 single-used bottles and $12600 spent on bottled mineral water.
- Compatible with RO water system, undersink filtration systems and refrigerator.
![]() K6 Instant Hot RO System |
![]() X12 RO System |
![]() X16 RO System |
![]() G3P800 RO Filtration System |
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![]() K19 Countertop RO System |
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Need Installation | √ | √ | √ | √ | √ | × |
---|---|---|---|---|---|---|
Flow Rate | 600 GPD | 1200 GPD | 1600 GPD | 800 GPD | 600 GPD | 75 GPD |
Pure to Drain Rate
![]() Drain ratio stands for the ratio of wastewater and
purified water dispensed by a RO system. For example, the 3:1 drain ratio means it uses
up a gallon of wastewater for every 3 gallons of pure water you get.
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Faucet | Smart faucet | Smart faucet | Smart faucet | Smart faucet | Smart faucet | / |
Display | Filter lifespan & TDS & Temperature adjustment | Filter lifespan & TDS | Filter lifespan & TDS | Filter lifespan & TDS | Filter lifespan & TDS | Filter lifespan & TDS |
Self-clean | √ | √ | √ | √ | √ | √ |
Holiday mode | √ | √ | √ | √ | √ | √ |
Electricity Required | √ | √ | √ | √ | √ | √ |
Filter Cartridges |
WD-KJF |
WD-F1A WD-F2 WD-X12-F3 |
WD-F1A WD-F2 WD-X16-F3 |
WD-G3-N1CF WD-G3P800-N2RO WD-G3-N3CB |
WD-G3-N1CF WD-G3P600-RO WD-G3-N3CB |
WD-K19RF |
Filter Lifespan | 12 Mths | F1A-12 Mths F2-6Mths F3-24 Mths |
F1A-12 Mths F2-6Mths F3-24 Mths |
CF-6 Mths CB-12 Mths RO-24 Mths |
CF-6 Mths CB-12 Mths RO-24 Mths |
12 Mths |
Dimensions (inch) | 6.7*17.5*16.6 | 18.2*6.25*16.72 | 18.2*6.25*16.72 | 18.06*5.65*17.75 | 18.11*5.67*17.73 | 13.8*7.9*16.3 |