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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 (4 reviews)
$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.
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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 4 reviews
5
100% (4)
4
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3
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2
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1
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Customer photos (3)

Runs whole house including 4-ton AC without flinching
Mark R.
Runs whole house including 4-ton AC without flinching
Clean freight delivery and great build quality
David M.
Clean freight delivery and great build quality
Fuel versatility is a complete lifesaver
Travis H.
Fuel versatility is a complete lifesaver
MR
Mark R.
Tyler, TX
October 24, 2026
★★★★★

Runs whole house including 4-ton AC without flinching

Ordered the Waterdrop G3P600 Electric Tankless Under-Sink Reverse Osmosis Water Filtration System (600 GPD) after getting tired of sitting in the dark during Gulf storms. Freight delivery arrived on a liftgate truck right onto my concrete driveway. Hooked it into our manual transfer switch with a 50A cord and ran our central 4-ton AC, two refrigerators, well pump, and all household lights. Electric start fired right up on propane.
Review photo from Mark R.
DM
David M.
Broken Arrow, OK
October 12, 2026
★★★★★

Clean freight delivery and great build quality

Driver called me 24 hours ahead of time to coordinate delivery. Unit was bolted onto a heavy pallet and wrapped securely. Added oil, connected a 100-lb propane tank, and pushed the start button. Purrs like a kitten and the digital meter makes monitoring voltage and hours simple. Couldn't ask for a better machine at this price point.
Review photo from David M.
TH
Travis H.
Ocala, FL
September 28, 2026
★★★★★

Fuel versatility is a complete lifesaver

The tri-fuel capability was the main selling point for me. Being able to connect directly to our residential natural gas line means no more storing 50 gallons of stale gasoline in the garage. Build quality is solid industrial grade and the frame feels bulletproof.
Review photo from Travis H.
GW
Gary W.
Marysville, OH
September 15, 2026
★★★★★

Remote start key fob works from inside the house

Tested the wireless remote start from about 80 feet away through the back patio door—started immediately. It is surprisingly quiet for an engine of this displacement. Very impressed with the packaging and complete hardware kit included.
Waterdrop G3P600 Tankless RO

Questions and answers

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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
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