- [First-to-market Instant Hot RO System] This RO water filter system K6 integrates water purification and heating, breaking the mold of conventional under-sink RO systems.
- [Instant Heating in Seconds] This RO water filter system K6 allows temperature adjustment in the range of 40-95℃ and is an ideal choice for making tea, baby formula or coffee, or cooking.
- Please note that the temperature of water you get may vary because of external factors like weather, cup temperature, etc.
- [5-stage Deep Purification] Its 5-in-1 filter includes an RO membrane, carbon blocks, PP cotton and other filtration substances, effectively reducing TDS, chromium, PFAS, fluoride, arsenic, salt, heavy metals, nitrates, particles, chlorine and other harmful substances through fine filtration.
- [Smart Design] Its smart display faucet allows you to get the TDS level and filtration conditions of water clearly. Besides, this system also has functions of a child lock and dispensed water temperature indication to avoid the scalding risk, bringing a smart and convenient life experience.
- [Safety Guaranteed] This RO water filter system K6 can automatically monitor the water purification process, and it also comes with a built-in flowmeter, NTC and a heating overheating protection function to prevent dry burn and guarantees the safety while achieving energy conservation.
- [2:1 pure to drain] With its high capacity of 600 GPD/2,271 L and high hot water flow rate of 0.4 gal/min, it can fill a cup with water within seconds. This RO water filter system has a high pure to drain ratio of 2:1, which saves water efficiently.
- [Quality Structure] Its shiny stainless steel nickel-plated faucet is oxidation-resistant and low in allergy while its upgraded Teflon tube is heat-resistant up to 500℉ (260℃), durable, and reliable.
- Please note that after initial installation and flushing, please manually activate the heating module for temperature setting. The heating indicator will not be available during the flushing state.
- [Effective elimination of hardness ions]: Reverse Osmosis system uses physical isolation and filtration processes to efficiently remove calcium and magnesium ions from water, thus reducing water hardness. It also eliminates a range of impurities, soluble salts, and organic substances, resulting in drinking water that boasts excellent taste and texture.
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
31.9 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?














![]() G3P600 RO System |
![]() K6 Instant Hot RO System |
![]() G2P600 RO Filtration System |
![]() K19 Countertop RO System |
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Need Installation | √ | √ | √ | × | |
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Flow Rate | 600 GPD | 600 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 | Ordinary faucet | / | |
Display | Filter lifespan & TDS | Filter lifespan & TDS & Temperature adjustment | Filter lifespan | Filter lifespan & TDS | |
Self-clean | √ | √ | × | √ | |
Holiday mode | √ | √ | √ | × | √ |
Electricity Required | √ | √ | √ | √ | |
Filter Cartridges |
WD-G3-N1CF WD-G3P600-RO WD-G3-N3CB |
WD-KJF |
WD-G2CF WD-G2P6MRO |
WD-K19RF |
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Filter Lifespan | CF-6 Mths CB-12 Mths RO-24 Mths |
12 Mths | CF-12 Mths P6MRO-24 Mths |
12 Mths | |
Dimensions (inch) | 18.11*5.67*17.73 | 6.7*17.5*16.6 | 17.32*5.91*13.9 | 13.8*7.9*16.3 |