Golden Standard RO:
Perfection You Trust
Waterdrop G3P800 Tankless RO System
800GPD
Fills a 6oz cup in 5s
10 Stages
Precise filtration
3:1
Pure to drain Ratio
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Waterdrop G3P800 Undersink Reverse Osmosis System
$300 Off
Best seller
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System
Waterdrop G3P800 Undersink Reverse Osmosis System

Waterdrop G3P800 Undersink Reverse Osmosis System

Remove 99% of lead - cleaner, safer, better
$699.00
$999.00
$300 Off
$999.00
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G3P800
 
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Design for
G3P800 Is Designed For Pure Drinking. Enjoy fresh, clean, great-tasting water instantly. The 800GPD RO system effectively reduces impurities for pure hydration every day.
Key Features
  • [800GPD High Capacity]: The Waterdrop G3P800 RO system filters 800 gallons of water per day with a fast flow, producing one 6oz cup of water in just 5 seconds.
  • [3:1 Pure to Drain Ratio]: This tankless RO system uses only one cup of wastewater to produce three cups of filtered water, thanks to advanced water dispensing technology.
  • [UV Sterilizing Light]: Equipped with a long-lasting LED lamp that automatically activates during water flow, achieving up to 99.9% sterilization.
  • [NSF/ANSI 42, 53, 58 & 372 Certified]: Certified by IAPMO R&T against NSF/ANSI 58 for TDS reduction, NSF 42 & 53 for chlorine, taste and odor reduction, and NSF/ANSI 372 for lead-free materials. See WD-G3P800 test results for details.
  • [Smart & Space-Saving Design]: Waterdrop G3P800 features a smart faucet that displays real-time TDS levels and water quality, while its sleek, tankless design saves 70% under-sink space.
Warranty
[1-Year Warranty, Guaranteed Reliability]: We’ve got you covered with a full year of protection, so you can enjoy clean water worry-free.
Replacement Filter
Replace filter for continued contaminants removal and system performance.
CF Filter
Provides up to 6 months or 550 gallons of clean water.
$29.99
Add To Cart
CB Filter
Provides up to 12 months or 1,100 gallons of clean water.
$29.99
Add To Cart
RO Filter
Provides up to 24 months or 2,200 gallons of clean water.
$139.99
Add To Cart
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Overview
Specs
Compares
Reviews
FAQs
Replacements

Waterdrop G3P800 Undersink Reverse Osmosis System

Overview
Specs
Compares
Reviews
FAQs
Replacements
Waterdrop G3P800 Undersink Reverse Osmosis System
Add - $699.00
Overview
Specs
Compares
Reviews
FAQs
Replacements
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Smart touch screen

10-Stage Filtration

0.0001μm RO membrane
2:1
3:1

Pure to drain ratio

Saves 1200% water
Composite filter

800GPD

High flow rate
30-min Easy Installation

Authorized Certification

Smart Display Faucet

UV Sterilization

G3P800
is
Designed
For

Pure Drinking
Suggested Family Size:
Water Tastes & Smells Unpleasant?
Reduces impurities for fresher taste and smell




Upgrade Your Drinking Experience
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800GPD High Flow Rate

Fills a 6oz cup in 5s.
Cool Now, Hot Instant

Discover Advanced Filtration Capacity

Enjoy pure and healthy water from now!

More Features
Enjoy Red Dot Award-Winning Tankless Ease
Quick & Easy: 30-min DIY installation; Compact & Stylish: Saves 70% undersink space
800GPD Fast Filtration
Get pure water instantly — no long waits.
Smart Display Faucet
Visible water status for worry-free drinking
3s Filter Replacement
Easily replace with a simple twist, no tools required.
VIS product (Copy)
Guards for Your Safe & Healthy Drinking
Reduces PFOA & PFOS by 99%
For your healthier life
0.0001μm RO Filtration
Reduces 1000+ impurities for pure drinking
Automatic Flushing Design
Ensures no wastewater residue
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Installation
Easy Installation in 30 Minutes
The Waterdrop G3P800 allows for easy 30-minute DIY installation with its all-in-one kit — no plumbing skills required.
Sustainability
Saves 1200% Water
Waterdrop G3P800 provides a sustainable and eco-wise water solution.
Sustainability
Certification
NSF/ANSI 42, 53, 58 & 372 Certified
Reduced substances
Fluoride, PFOA & PFOS, TDS, Chlomium, Chlorine, Lead*, Taste & Odor*, Large Particles*, Heavy Metals*, Rust*, Sand*, Salt*, Nematodes*, Sediments*, VOCs*, and More Impurities*
*Tested by a third-party laboratory.
System Certified by IAPMO R&T to NSF/ANSI 42, 53 and 58 for the reduction of the claims specified on the Performance Data Sheet, and to NSF/ANSI 372 for low lead.
View the Report
Sustainability
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Media Attention

Offers everything they expect from a reliable and efficient household filtration system. It has all they need to safeguard the cleanliness and health of the drinking water.
Reverse-osmosis systems have membranes that remove all your standard contaminants, plus extras like viruses, bacteria and parasites. Waterdrop G3, for example, carries an NSF 58 certification, which is one of the highest filtrations possible.
Waterdrop (G3P800) is NSF 58 certified, one of the highest standards, so it can stand up to everything from heavy metals to pharmaceuticals to PFAS.
Waterdrop RO System is one of the most popular options for homeowners who are interested in saving space and conserving water.
Ranked as one of the best reverse osmosis systems, the Waterdrop tankless model has high output for large households.
The Waterdrop G3P800 is a multi-certified cutting-edge tankless reverse osmosis water filtration system that packs a lot of modern, advanced features, including a space-saving design, a large filtration capacity, a smart LED reminder, and upgraded filtration capabilities.
The G3P800 reverse osmosis system a total of 800 gallons per day, making it one of the fastest water filtration systems on the market. Furthermore, it maintains a 3:1 pure-to-drain ratio.
Best Tankless System. Save space under your sink with this tankless reverse osmosis system.
Waterdrop is known for its large variety of water filters, with its under-sink filters range topping the list among them.
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Customer Review
G3P600 G3P600
Excellent product and service! With Safety and Quality as their standard, Waterdrop knocks it out of the ballpark for pure, unadulterated water!! Many thanks!!
Gail Warren
G3P600 G3P600
We love our new RO system. It's already saved us $$ since we are no longer buying bottled water, and I am so glad to reduce our use of single-use plastics as well. The water tastes great and the system works like a dream
VANESSA
G3P600 G3P600
Been through many different systems from Lowes (AO Smith) and Home Depot. Waterdrop filters are my favorite in design. It obviously works like it's supposed to. But the ease of changing filters is awesome. It's a breeze now. Love the design.
Kenny Roberts
G3P600 G3P600
Great system. Was buying bottled water before but even some bottled water tasted off. I don't have that issue with the waterdrop RO. Water tastes great.
Shellene TURNIPSEED
G3P600 G3P600
After many years of unsuccessfully trying water pitchers and refrigerator filters the Waterdrop 800 with UV sterilizer has finally cut off my dependence on bottled water.
Joseph
G3P600 G3P600
Excellent product and service! With Safety and Quality as their standard, Waterdrop knocks it out of the ballpark for pure, unadulterated water!! Many thanks!!
Gail Warren
G3P600 G3P600
We love our new RO system. It's already saved us $$ since we are no longer buying bottled water, and I am so glad to reduce our use of single-use plastics as well. The water tastes great and the system works like a dream
VANESSA
Review
Hear From Our Pros
Discover why experts trust the Waterdrop Undersink RO System! Enjoy purified water instantly, with space-saving convenience perfect for your kitchen.
G3P800
Specification
Model
G3P800
Pure to Drain
3:1
Product Dimensions (In)
18.11*5.67*17.73
Product Weight (Ib)
32.4 pounds
Filtration
10-stage Filtration
Capacity
800GPD
Certification
NS/ANSI 42 & 53 & 58 & 372
Faucet
Smart Faucet
Usage
Indoor use only
Electricity Required
Yes
In The Box(17)
User Manual
x1
System
x3
Replacement filters
x1
RO faucet
x1
Power adapter
x1
UV Sterilizer
x1
white 3/8” PE tubing
x1
Feed water adapter 3/8”-1/2”
x5
lock clip
x1
Teflon tape
x1
Drain saddle 1/4”
x1
Red 1/4” PE Tubing
Compare
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G3P800

G3P800

$699.00

$999.0 $300 Off
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G3P600

G3P600

$399.00

$539.0 $140 Off
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X8

X8

$499.00

$799.0 $300 Off
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Flow Rate
Flow Rate 800 GPD 600 GPD 800 GPD
Alkaline Mineralization
Alkaline Mineralization × × ×
Pure to Drain Rate
Pure to Drain Rate 3:1 2:1 2:1
Filtration Stages
Filtration Stages 10 Stages 8 Stages 9 Stages
Faucet
Faucet Smart Display Faucet
TDS & filter life monitor		 Smart Display Faucet
TDS & filter life monitor		 "Smart Display Faucet
TDS & filter life monitor
Filter lifespan
Filter lifespan CF 6 Mths
CB 12 Mths
G3P800-RO 24 Mths 		CF 6 Mths
CB 12 Mths
G3P600-RO 24 Mths 		F1G 12 Mths
F2 6Mths
X8-F3 24 Mths
Average annual cost
Average annual cost $159.97 $144.97 $162.97
Warranty
Warranty 1 Years 1 Years 2 Years
Certification
Certification NSF/ANSI 42 & 58 & 372 NSF/ANSI 42 & 58 & 372 NSF/ANSI 42 & 58 & 372
Dimensions (inch)
Dimensions (inch) 18.11*5.67*17.72 18.11*5.67*17.72 18.11 * 5.51* 17.72
Item Weight
Item Weight 36 pounds 32.4 pounds 36.45 pounds
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Waterdrop users rave about the clean, crisp taste and health benefits of filtered water. Read their stories and see why they choose us.
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FAQ
Curious about how the RO filter works? Our FAQ section covers everything from filter lifespan to installation tips for clean, pure water every day.
Contact Us
What contaminants does the G3P800 RO system reduce?
Tested by a third party lab, Waterdrop G3P800 utilizes a 10-stage filtration process, effectively reducing impurities such as PFOA, PFOS, fluoride, heavy metals (e.g., lead, chromium, arsenic), salts (e.g., nitrate, chloride), and large particles.
How often should I replace the filters?
CF Filter: Every 6 months or after filtering 550 gallons, whichever comes first.
CB Filter: Annually or after filtering 1,100 gallons, whichever comes first.
RO Filter: Every 2 years or after filtering 2,900 gallons, whichever comes first.
Is the UV sterilizer necessary, and does it require regular replacement?
Yes, the UV sterilizer enhances water purity by reducing up to 99.9% bacteria. It features an advanced LED part with a long lifespan, requiring little to no maintenance over the years.
How easy is it to install the G3P800?
Waterdrop G3P800 under sink RO system enables easy DIY installation with clear step-by-step instructions and an instructional video for installation.
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