Waterdrop - 800 GPD Tankless RO System with UV Sterilizing Light - Waterdrop G3P800

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Waterdrop G3P800 Tankless Reverse Osmosis System (800 GPD, UV Sterilization)

The Waterdrop G3P800 is an advanced reverse osmosis water filtration system designed for families who demand fast flow, superior purification, and space-saving convenience. With a tankless design and an impressive 800 gallons per day (GPD) capacity, it provides fresh, clean water instantly — no waiting, no bulky storage tanks.

Key Benefits

High Flow Rate – 800 GPD
Rapid and abundant purified water flow. Fill a glass in seconds.
10-Stage Precision Filtration
Effectively reduces PFAS, fluoride, heavy metals, chlorine, sediments, and more.
UV Sterilization
Built-in UV light removes 99.9% of bacteria, ensuring safe drinking water.
Protects Against Lead
Tested for >99% lead reduction — ideal for homes with older plumbing.
Smart & Certified
Certified by NSF/ANSI 42, 53, 58 & 372 standards for safer, better-tasting water.
Eco-Friendly Efficiency
3:1 pure-to-drain water ratio — saves water compared to traditional RO systems.
Space-Saving Tankless Design
Fits neatly under the sink, reducing risk of secondary contamination.

Why Choose the G3P800?

Trusted by 40M+ families in the USA
Certified by 7 international organizations
Passed 205 material safety tests
Proven to reduce 114 harmful substances

Bring peace of mind to your home with the Waterdrop G3P800 — delivering healthy, great-tasting water with cutting-edge RO technology.

Model number

WD-G3P600

Certification

 NSF/ANSI 58 & 372

Pure to drain

2:1

Materials

System cover: BPA-free plastic
Faucet: smart display faucet
RO filter: reverse osmosis membrane
CB filter: carbon block
CF filter: PP cotton & carbon block

Power cord length

90 inches

Product dimensions

18.11 x 5.67 x 17.73 inches

Item weight

32.4 pounds

Included components

System cover, Smart screen faucet, RO filter, CF filter, CB filter, PE pipes *3 ( 60" ), T-fitting, drain saddle, lock clips, power adapter (Main power cable 90", faucet's power cable 59")

Faucet

Smart Screen Faucet

Flow rate

0.42 gallon per minute (GPM), 600 gallons per day (GPD)

Indoor or outdoor use

Indoor use only

Wall plug

Yes

Usage conditions

Ice machines, Faucets, Aquariums, RVs

                            An electrical outlet is required to operate the RO system.

Reduction substances

TDS, chlorine, taste and odor, chloramine, scale, turbidity

                            Carcinogens: chromium (hexavalent), chromium (trivalent), cadmium and cadmium compounds, ferric oxide

                            Heavy metals: lead, mercury, barium, copper, radium 226/228, aluminum

                            Microorganic contaminant: cyst

                            Inorganic pollutants: arsenic and inorganic arsenic compounds, fluoride

                            Organic pollutants: asbestos, benzene, formaldehyde, nitrite bisphenol A, trichloromethane, chlordane, PFOA & PFOS, and more

What is the difference between Waterdrop and traditional RO systems?

	Waterdrop G3P600 RO system	Waterdrop G3 RO system	Traditional RO system
Tankless design	✔	✔	✖
Flow rate	600GPD	400GPD	50-100GPD
Smart leakage protector	✔	✔	✖
3s filter change time	✔	✔	✖
Pure to drain	2 : 1	1 : 1	1 : 3
Real-time Water Quality Display	✔	✔	✖

What is the pure to drain ratio?

The pure to drain ratio is 2:1, therefore, for every 2 cups of pure water you get, only 1 cup of wastewater is produced, which is much higher than the traditional RO systems.

What is new about the Waterdrop G3P600 Ro water filter system?

The RO system offers faster water flow (600 gallons per day) and can filter a cup of water in about 8 seconds. Compared to traditional RO systems, the Waterdrop RO System has a low drain ratio of 2:1. Save more money on your water bills!

What is reverse osmosis water systems?

Reverse osmosis (RO) is a water purification process that uses a partially permeable membrane to filter out impurities from drinking water. In reverse osmosis, an applied pressure is used to overcome osmotic pressure, a colligative property that is driven by chemical potential differences of the solvent, a thermodynamic parameter. The result is that the solute is retained on the pressurized side of the membrane and the pure water is allowed to pass to the other side. To be "selective", this membrane should not allow large molecules or ions through the pores, but should allow filtered clean water to pass freely.

How does a reverse osmosis system work?

A reverse osmosis system reduces sediment and chlorine from water with a prefilter before it forces water through a semipermeable membrane to reduce dissolved solids. After water exits the RO membrane, it passes through a postfilter to filter the drinking water before it enters a faucet.

Does the reverse osmosis water filtration system produce wastewater?

All RO systems will produce concentrated water to discharge impurities. Compared to traditional RO water purifiers, Waterdrop RO system produces less concentrated water and saves 300% more water. You can collect concentrated water to mop the floor, wash your car, do laundry, etc.

What contaminants can Waterdrop reverse osmosis water filter system remove?

Waterdrop reverse osmosis water filter system adopts advanced composite filter technology. Uses the characteristics of various filter materials skillfully and combines them to achieve better filtration. The composite filter can intercept most harmful contaminant.

• TDS, chlorine, taste and odor, chloramine, scale, turbidity.

• Carcinogens: chromium (hexavalent), chromium (trivalent), cadmium and cadmium compounds, ferric oxide.

• Heavy metals: lead, mercury, barium, copper, radium 226/228, aluminum.

• Microorganic contaminants: cysts.

• Inorganic pollutants: arsenic and inorganic arsenic compounds, fluoride.

• Organic pollutants: asbestos, benzene, formaldehyde, trichloromethane, chlordane, PFOA & PFOS, etc.

Does Waterdrop reverse osmosis water filter system need power?

The RO system has a pump that will need power to maintain a fast water flow rate.

How to install reverse osmosis system?

Waterdrop RO systems are designed for DIY installation. You can install the system in 30 minutes. Simply refer to the instruction manual and instructional videos, or contact us by email, phone, or live chat.

This video explains how to install Waterdrop RO system.

How often do I need to change the RO filter?

G3: The CF filter has a 6-month lifetime; the CB filter has a 1-year lifetime; the RO filter has a 2-year lifetime. Waterdrop G3 Reverse Osmosis System has a smart faucet and filter life indicators that will remind you to replace the filter.

Does the reverse osmosis system make a loud sound?

The sound will not exceed 65 dB, which is a comfortable level for everyday life (65 dB is tested under standard laboratory conditions, where the feed water pressure is between 14.5 psi and 87 psi). A loud sound may be caused by the following:

a. The system is not positioned in a flat area. Make sure the system is placed smoothly without shaking.

b. The system is placed against the cabinet. Do not place the system against the cabinet. The system may vibrate when it works.

c. The water pressure is unstable. Check and confirm the water pressure is between 14.5 psi and 87 psi. The sound will decrease when the water pressure becomes stable.

When you change filters, do you need to turn the water off?

The water source and power supply are not required to be cut off when the filters need to be replaced. The replacements can be directly screwed and reinstalled. RO system can be normally used after resetting and the flushing process are finished.

Does the RO system remove coliform and other parasites?

Our RO system uses reverse osmosis filtration technology with a filtration accuracy of 0.0001um, and the system can effectively reduce most contaminants, including coliform and other parasites.

Does this system eliminate or remove Atrazine?

As a benefit of the RO membrane (filtration accuracy: 0.0001μm), this system is able to reduce the atrazine from the source water. In addition, the composite filters of G3 can also reduce chlorine, fluoride, heavy metals and provide you with fresh and tasty water.

Does this RO water system remove arsenic?

As a benefit of the RO membrane (filtration accuracy: 0.0001μm), this product is able to reduce the arsenic efficiently from the source water. The membrane has microscopic pores that are specially sized to allow water molecules through, while trapping larger inorganic molecules like lead, iron, chromium and arsenic.

Is this reverse osmosis water filter system unit suitable for well water?

We do not recommend using well water as source for our RO systems.
The reasons are as follows:
1. Large particles.
Compared to municipal tap water, the well water is rich of large particles, which will clog the filters easily, and shorten their lifetime significantly.Please note that the filters will still need to be replaced more frequently, even if you have added a pre-filtration system.
2. Composition
The well water has very complicated compostion, and some of them (apart from the large particles) can cause the filter or internal valve to be clogged and prevent the RO system from normal performance.
3. Water pressure
The well water may not provide the feed water pressure that the RO system requires (14.5 psi min.). Furthermore, the water pressure will be even lower after passing through pre-filtration systems.

Do you need to have an electrical outlet under your sink for this work?

As a standard appliance, this product will need to be plugged into one electrical outlet to function normally.

Does this RO system need a drain piping nearby for discharge?

Yes, this model does need a drainpipe nearby, for discharging the waste water. For that, we provide an adjustable drain saddle to connect the RO's waste water tubing to your drainpipe.

What is the amount of space required between the RO unit and the cabinet?

In order to avoid the vibration which can affect the use experience, please ensure that there is an about 1-inch gap between the RO system and the cabinet. The size of the RO Filtration system is 18.11 "* 5.67" * 17.72 ", without a storage tank. It's very thin and takes up very little space.

Has this RO water system been NSF certified yet?

Waterdrop G3P600 reverse osmosis system is certified against NSF/ANSI 58 for TDS reduction and NSF/ANSI 372 certified for lead-free material. See WD-G3P600 RO system test results for more.

Is the water line hose 1/4" or 3/8"?

Inlet tubing: 3/8", Outlet tubing (connect with RO faucet): 1/4", Feed water adapter: compatible with 3/8" and 1/2" water line.

Can I buy the accessory kit so that I can hook up my fridge all at once?

Yes, the instruction manual explains how to connect the Waterdrop to your fridge using parts purchased from a hardware store. The output from the Waterdrop to the faucet is 1/4” tubing. If your fridge has a 1/4” input, all you need is a 1/4” quick-connect T-adapter and the tubing that you’ll run to your refrigerator - you can find these online or at your local hardware store. If your refrigerator is like mine, the input is 3/8”, so I had to add an additional 1/4” to 3/8” adapter to the line leading from the T-adapter to the fridge. It doesn’t affect the performance of the Waterdrop at all.

Is this reverse osmosis water system BPA free?

Please note that our RO system is BPA free.

Does this reduce or remove the salt in the water from my water softener?

Although with filtration accuracy of 0.0001 μm, this model can reduce Calcium ion 90% of the salt from the water, the remaining salt added by the water softener may still affect the water taste. Therefore, we don't recommend placing the RO system after a salt-based water softener, since the taste will be affected.

What is the minimum water pressure to operate this unit?

The rated water inlet pressure of the machine is 14.5-87psi. It can work properly within this range.

What size hole would I need to drill to install the faucet in my sink?

It's recommended to drill a hole of 1". If there's a reserved hole for the soap dispenser on your countertop, you could use that to install the RO faucet directly. In addition, we have included a sticker in the package, which could be used as a reference while drilling the hole.

How often do you need to replace the reverse osmosis filters?

The life of the filter element of our machine depends on the two indexes of service time and pure water after filtration. As long as one of them reaches the upper limit, it needs to be replaced. The first stage front compound filter element is recommended to last for 6 months or to filter 550 gallons of pure water. The second stage RO element is recommended to last 24 months or to filter 2200 gallons of pure water. The third stage rear carbon rod filter is recommended to last 12 months or to filter 1,100 gallons of pure water. Due to the different water quality and water consumption of each house, the actual replacement time of the filter element is not consistent. The actual use situation shall prevail. When the filter element needs to be replaced, the prompt light on the machine and the lamp ring of the faucet will prompt through the color change. You can replace it according to the prompt, which is very convenient.

Can the system be connected with a UV water sterilizer?

Yes, it can be connected with a UV water sterilizer, and it requires an extra power plug (the UV water sterilizer requires extra power).

How often do you have to change the membrane?

The RO membrane filter needs to be changed every 24 months or 2200 gallons.

Can the system be connected to the refrigerator so the ice is filter as well?

Generally speaking, the RO system can be connected to your refrigerator. After completing the registration online, you could choose the accessory kit, which will help you connect the RO to your refrigerator/ice maker. Since different refrigerator/ice maker has various requirement of water pressure, it's not possible for our RO system to provide them all. Connection under mismatched circumstance may result in many problems, including but not limited to: slow ice making, frequent start-stop issue, etc. Therefore, it's NOT recommended to connect the RO system to your refrigerator/ice maker.

Does this reverse osmosis water system prevent bacteria from growing in the filter?

Please rest assured that the RO membrane (filtration accuracy 0.0001 μm) can effectively reduce bacteria and virus whose diameter are greater than 0.0001 μm from the source water.

What is the waste water to filtered water ratio?

The waste to filtered water ratio is 1:1, which is much higher than the traditional RO systems.

Can I use our own faucet？

Truly sorry, the brushed nickel faucet is the only option available now.
You could use your own RO faucet with our product, but not normal faucet for tap water.
There are a few things you may need to know before purchasing one:
Firstly, our faucet is equipped with a filter life indicator, which allows you to monitor the filters' life easily. If you decide not to use our original faucet, this function will not be in effect.
Secondly, your RO faucet should be able to connect with the outlet tubing of the system, which has a diameter of 1/4".
In addition, it should have a "Quick-Connect Fitting", please click here.
OR, it should come with a set of accessory parts, which allows you to connect the faucet with the bare end of our outlet tubing. Please click here to see the example for your reference.
If the faucet does not meet one of these requirements, you will need to acquire a corresponding adapter, in order to complete the connection with the machine.

What does Pure to Drain Rate mean?

The reverse osmosis water filter relies on a semi-permeable membrane to filter out impurities from drinking water. When the tap water is compressed through the RO membrane, it produced pure water and waste water. The ratio of pure water to waste water is called wastewater ratio. 1:1 wastewater ratio means 1 gallon water is wasted per 1 gallon purified, and 2:1 wastewater ratio means 1 gallon water is wasted per 2 gallon purified. The higher the wastewater ratio is, the less waster water produced during the filtration process. During the use of RO water filter, the actual ratio might be lower than the labeled, depending on many factors such as water quality, pH, pressure and temperature.

Is the G3P600 RO replacement filter suitable for the G3 RO system?

We do not recommend using the G3P600 RO replacement filter for the G3 RO system. Using an impropriate filter will affect the performance of the machine itself.

Could my old G3 be upgraded to the new model G3P600 for free?

We do not support exchanging old machines for new ones now. You can contact us to get more help.
+1-888-352-3558
service@waterdropfilter.com

NSF/ANSI 58 & 372 Certified

Waterdrop reverse osmosis system is certified against NSF/ANSI 58 for TDS reduction and NSF/ANSI 372 certified for lead-free material.
Based on testing performed under NSF/ANSI standards 53 & 58, the benzene, methoxychlor and lindane reduction rate is up to 99%. See WD-G3P600 RO system test results for more.

System is tested and certified by IAPMO R&T against NSF/ANSI Standard 58 for the reduction of TDS, and against NSF/ANSI 372 (≤0.25% lead).

600 GPD Fast Flow

600 GPD large capacity ensures a faster flow, which is also more stable and durable. It only takes 8s to fill up a glass of water.

8-stage Deep Filtration

Through 8-stage deep filtration, it can reduce chlorine, taste and odor, chloramine, scale, turbidity, cysts, and many heavy metals, such as hexavalent chromium while improving the taste of water.

Less Expenditure, Better Choice

Because of its 2:1 pure to drain ratio, this tankless reverse osmosis system can produce two cups of purified water while producing only one cup of wastewater. This helps you save money on your water bills in some way.

Smart Display Faucet

The reverse osmosis water system is built with a smart display faucet with TDS monitoring and filter life detecting functions, which helps you to get the water quality and filter life at a glance.
*Please note that the TDS level may vary based on your local water quality.

Tankless Design

With the tankless design, it can effectively avoid secondary contamination of bacteria while freeing up 70% of under sink space.

Easy to Install & Replace

Waterdrop G3P600 RO system can be installed in 30 minutes, and the filter can be changed in just 2 seconds.
There’s no need to move the system, nor is there a need for tools.

Kind notice

Please refer to this diagram and be informed that you need to drill a hole on your countertop to place the smart faucet (No need for this step if your countertop already has a hole). Besides, an adapter will be installed on your household water tubing to connect to RO system’s wastewater tubing and input water tubing.
Electricity is required to run the RO system.
We do not recommend using well water as source for our RO systems. But this tankless RO can connect to a refrigerator or ice maker through our PMT water pressure tank.
It's highly recommended to install our RO system with components provided by Waterdrop. Installing the system with any parts or accessories that are not provided by Waterdrop may cause the system to malfunction or shorten the lifetime of the system/filters.

A sip of nature doesn’t cost much

The remineralization filter can connect to all types of under sink water filter systems. By adding one filter, you can enjoy remineralization water with a refreshing taste. Please click here to purchase this add-on filter.

	G3P600 RO System	G3P800 RO Filtration System	K6 Instant Hot RO System	D6 RO Filtration System	G2P600 RO Filtration System	K19 Countertop RO System
Need Installation	√	√	√	√	√	×
Flow Rate	600 GPD	800 GPD	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.
Faucet	Smart faucet	Smart faucet	Smart faucet	Smart faucet	Ordinary faucet	/
Display	Filter lifespan & TDS	Filter lifespan & TDS	Filter lifespan & TDS & Temperature adjustment	Filter lifespan & TDS	Filter lifespan	Filter lifespan & TDS
Self-clean	√	√	√	√	×	√
Holiday mode	√	√	√	√	×	√
Electricity Required	√	√	√	√	√	√
Filter Cartridges	WD-G3-N1CF WD-G3P600-RO WD-G3-N3CB	WD-G3-N1CF WD-G3P800-N2RO WD-G3-N3CB	WD-KJF	WD-D6RF	WD-G2CF WD-G2P6MRO	WD-K19RF
Filter Lifespan	CF-6 Mths CB-12 Mths RO-24 Mths	CF-6 Mths CB-12 Mths RO-24 Mths	12 Mths	12 Mths	CF-12 Mths P6MRO-24 Mths	12 Mths
Dimensions (inch)	18.115.6717.73	18.065.6517.75	6.717.516.6	15.985.9811.97	17.325.9113.9	13.87.916.3

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Product FAQs

Name: Waterdrop - 800 GPD Tankless RO System with UV Sterilizing Light - Waterdrop G3P800
Brand: Waterdrop
SKU: WD-G3P800-W-FC
Price: 999.0 USD
Availability: InStock

What is the daily water production capacity of the Waterdrop G3P800?

The Waterdrop G3P800 has a capacity of 800 gallons per day (GPD).

How does the Waterdrop G3P800 sterilize water?

It uses a built-in UV light to remove 99.9% of bacteria.

What contaminants does the 10-stage filtration system reduce?

The 10-stage filtration effectively reduces PFAS, fluoride, heavy metals, chlorine, sediments, and more.

What is the pure-to-drain water ratio for the Waterdrop G3P800?

The system has an Eco-Friendly Efficiency of 3:1 pure-to-drain water ratio.

Is the Waterdrop G3P800 certified for water safety standards?

Yes, it is certified by NSF/ANSI 42, 53, 58 & 372 standards.

Waterdrop - 800 GPD Tankless RO System with UV Sterilizing Light - Waterdrop G3P800

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