facebook-pixel
Free residential delivery on every order 30-day returns and a 3-year warranty
Tankless RO · 600 GPD In stock · ships from Dallas

Waterdrop G3P600 Electric Tankless Under-Sink Reverse Osmosis Water Filtration System (600 GPD)

NSF 58 & 372 certified 600 GPD smart electric tankless reverse osmosis system with real-time digital TDS display faucet and 2:1 low waste ratio.
5.0 (3 reviews)
Canceled Commercial Freight Surplus Factory Sealed · Brand New

Why is this discounted 61%? Commercial freight surplus inventory liquidated from unclaimed regional carrier warehouse allocations in Dallas. Brand-new in original factory packaging.

Factory Sealed Packaging Zero Runtime Hours Full Manufacturer Warranty
$139.00 $360.00 SAVE $221.00 (61% OFF)
In stock · ready to ship Ships tomorrow Order today and it leaves our Dallas, TX warehouse tomorrow.
Tracking number sent by email as soon as the freight carrier picks up your order.
Secure, encrypted checkout
  • Apple Pay
  • Google Pay
  • 1-year commercial warranty
  • 30-day returns
  • Free delivery
Questions Before Ordering? Talk to Customer Care 24/7
Dallas Team On Duty
  • ✓
    Hydraulic Liftgate Delivery: Carrier calls 24h ahead to schedule residential driveway or jobsite unloading.
  • ✓
    Official Crate Paperwork: Ships with EPA Tier 4 Final certificate & Manufacturer Certificate of Origin (MCO).
  • ✓
    Direct Specialist Support: Confirm pin dimensions, trailer weight, or live freight PRO tracking anytime.
Daily Flow
600 GPD
Fills 8oz glass in 8 sec
Purification
99% TDS
PFAS, lead, fluoride & TDS
Smart Faucet
TDS + Life
Real-time digital LED screen
Drain Ratio
2:1
High efficiency pure-to-drain
Overview

Waterdrop G3P600 Electric Tankless Under-Sink Reverse Osmosis System (600 GPD)

The Waterdrop G3P600 represents the cutting edge of domestic drinking water purification, replacing bulky multi-tank setups with an ultra-compact, tankless integrated manifold that frees up over 70% of your under-sink cabinet storage space. Certified against NSF/ANSI Standard 58 for TDS reduction and NSF/ANSI Standard 372 for lead-free materials, its 8-stage precision core filtration matrix eliminates up to 99% of over 1,000 harmful tap water contaminants—including PFAS, heavy metals, chlorine, chloramines, arsenic, fluoride, nitrates, and microplastics. Delivering a fast 600 Gallons Per Day flow rate, the G3P600 fills an 8-ounce glass of water in just 8 seconds without the stagnant water taste associated with rubber bladder storage tanks. Equipped with an intelligent smart designer LED faucet featuring real-time water quality monitoring (displays exact outgoing TDS and individual filter remaining lifespan directly on the faucet collar), auto-flushing cycles, and a class-leading 2:1 pure-to-drain low wastewater ratio, the G3P600 provides modern luxury, convenience, and pure water peace of mind.

  • Compact Tankless Space Saver Sleek 5.7-inch slimline chassis saves up to 70% under-sink storage space and prevents secondary tank contamination.
  • Smart Digital TDS Faucet High-end smart faucet displays real-time filtered water TDS levels and filter replacement countdown alerts at a glance.
  • Fast 600 GPD High-Speed Flow High-pressure internal booster pump dispenses fresh, pure water instantly at 0.42 GPM (fills a glass in 8 seconds).
  • 8-Stage Deep Core Purification Combines composite sediment, activated carbon block, 0.0001-micron RO membrane, and post-filtration protection.
  • 2:1 High Efficiency Low Drain Ratio Advanced water-saving design saves up to 600% more water compared to traditional 1:3 or 1:4 legacy RO systems.
Waterdrop G3P600 Electric Tankless Under-Sink Reverse Osmosis Water Filtration System (600 GPD)
Waterdrop G3P600 Tankless RO — Compact Tankless Space Saver
Waterdrop G3P600 Tankless RO · Feature 1

Compact Tankless Space Saver

Compact Tankless Space Saver: Sleek 5.7-inch slimline chassis saves up to 70% under-sink storage space and prevents secondary tank contamination. Smart Digital TDS Faucet: High-end smart faucet displays real-time filtered water TDS levels and filter replacement countdown alerts at a glance.

Waterdrop G3P600 Tankless RO — Fast 600 GPD High-Speed Flow
Waterdrop G3P600 Tankless RO · Feature 2

Fast 600 GPD High-Speed Flow

Fast 600 GPD High-Speed Flow: High-pressure internal booster pump dispenses fresh, pure water instantly at 0.42 GPM (fills a glass in 8 seconds). 8-Stage Deep Core Purification: Combines composite sediment, activated carbon block, 0.0001-micron RO membrane, and post-filtration protection.

Waterdrop G3P600 Tankless RO — 2:1 High Efficiency Low Drain Ratio
Waterdrop G3P600 Tankless RO · Feature 3

2:1 High Efficiency Low Drain Ratio

2:1 High Efficiency Low Drain Ratio: Advanced water-saving design saves up to 600% more water compared to traditional 1:3 or 1:4 legacy RO systems.

Waterdrop G3P600 Tankless RO

Specifications

Figures for this model. If you need a detail that isn’t listed, ask us and we’ll check before you order.

Ask about this model
Daily Output 600 Gallons Per Day (GPD)
Flow Rate 0.42 GPM (fills 8 oz glass in 8 seconds)
Pure to Drain Ratio 2:1 (Water-saving high efficiency)
Filtration Technology 8-Stage core composite + 0.0001μm Reverse Osmosis membrane
Contaminant Reduction Reduces up to 99% of TDS, PFAS, lead, chlorine, fluoride, chromium & arsenic
Smart Faucet Solid metal brushed nickel smart faucet with real-time digital TDS screen & filter indicator
Power Requirements 100–240V AC / 50–60Hz (under-sink standard outlet)
Feed Water Pressure 14.5 – 87 PSI
Operating Temperature 41°F – 100°F (5°C – 38°C)
Chassis Dimensions 18.06" L × 5.67" W × 17.72" H
Filter Replacement Snap-in 3-second twist-and-pull filter change mechanism without shutting off main water
Certifications NSF/ANSI 58 Certified, NSF/ANSI 372 Lead-Free Certified, FCC, IAPMO Gold Seal
Warranty 1-Year Manufacturer Warranty + Lifetime Technical Support
Waterdrop G3P600 Tankless RO

What’s included

These come with the machine.

Customer reviews

Reviews from Waterdrop G3P600 Tankless RO owners.

5.0
Based on 3 reviews
5
100% (3)
4
0% (0)
3
0% (0)
2
0% (0)
1
0% (0)

Customer photos (1)

TDS dropped from 380 down to 14 ppm — pure bottled quality
Marcus T.
TDS dropped from 380 down to 14 ppm — pure bottled quality
MT
Marcus T.
Scottsdale, AZ
October 24, 2026
★★★★★

TDS dropped from 380 down to 14 ppm — pure bottled quality

Our municipal tap water here in Arizona has a strong mineral and chlorine bite. Installed the Waterdrop G3P600 Tankless Reverse Osmosis System under our kitchen sink in about an hour and a half. The quick-connect fittings made plumbing straightforward with zero leaks. Flow rate from the dedicated faucet is strong and fills a large glass in seconds. Tea, coffee, and ice taste completely pure now.
Review photo from Marcus T.
ER
Elena R.
Tampa, FL
October 11, 2026
★★★★★

Tankless design saves so much under-sink storage space

Replaced an old bulky tank system with this Waterdrop G3P600 Tankless Reverse Osmosis System. Having full access to our cleaning supplies under the sink again is fantastic. The real-time filter life indicator is very convenient, and the water tastes noticeably crisper than standard pitcher filters.
BH
Brian H.
Austin, TX
September 19, 2026
★★★★★

Packaged securely, fast delivery and crystal clear ice cubes

Arrived in double-boxed commercial packaging with all adapters and color-coded tubing included. Hooked it to both the sink faucet and our refrigerator ice maker. Ice cubes are crystal clear and there is no plastic aftertaste.
Waterdrop G3P600 Tankless RO

Questions and answers

Can’t find what you need? Send us a message and we’ll get back to you.

Contact us
Does this system require an electrical outlet under the sink?

Yes. Because it uses an internal booster pump to provide fast tankless 600 GPD flow, it plugs into a standard 110V/120V household outlet under your sink.

How does the smart faucet display work?

The faucet features a circular digital screen at its base that continuously measures and displays the TDS (Total Dissolved Solids) in real time while water is flowing, plus a ring indicator that changes color when a filter change is due.

How hard is it to change the filters?

Filter changes take literally 3 seconds. The front magnetic panel pulls off, and the filters twist out and click back in like a lightbulb. You do not even have to turn off the water supply.

Can this be hooked up to my refrigerator ice maker?

Yes. You can tee off the filtered water line to feed your refrigerator dispenser and ice maker using 1/4" PE tubing.

How much water is wasted compared to a tank system?

The G3P600 has an industry-leading 2:1 pure-to-drain ratio, producing 2 cups of pure water for every 1 cup of drain water, saving up to 600% more water than older 1:3 systems.

What is the return and warranty policy?

Groundmark offers free residential shipping from our Dallas hub, 30-day money-back guarantee, and 1-year comprehensive manufacturer warranty.

How does delivery work?

Delivery is free to residential addresses. Orders ship from our Dallas, TX warehouse, and larger items arrive by freight with a liftgate drop at your curb or driveway. You get a tracking number by email as soon as the carrier picks up your order.

$139.00 Free delivery
Waterdrop G3P600 Electric Tankless Under-Sink Reverse Osmosis Water Filtration System (600 GPD) 1 / 6