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Waterdrop Reverse Osmosis Tankless Water Filter - G2 RO Undersink Series - WD-G2-B
No Tank. No Wasted Space. No Excuse For Bad Water Anymore. The WaterDrop G2 Tankless RO System ditches the bulky storage tank entirely — genuine reverse osmosis filtration in a footprint that actually fits under a real kitchen sink.
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DESCRIPTION
Old-school RO systems: giant tank, slow trickle, gallons of waste. Hard pass.
The Waterdrop G2 is a tankless reverse osmosis system that fits under your sink and makes up to 400 gallons of purified water per day. It runs a 1:1 pure-to-drain ratio, so it wastes far less water than traditional RO, and it reduces TDS, lead, chlorine, PFAS, and other contaminants.
Filter life indicators tell you exactly when to swap. Swaps are tool-free with a twist and pull.
Fast. Compact. Smug about efficiency.
HOW TO USE
- Install it under the sink. Connect to the cold water line, mount the faucet, attach the drain line, and plug it in. It needs an outlet under the sink.
- Flush the filters as directed before your first glass.
- Pour and enjoy. Water flows on demand, no tank to fill.
- Watch the indicator lights. The CF filter typically lasts about 12 months, the RO filter about 24 months. Twist, pull, replace.
HOW DOES IT WORK
Stage one is the CF composite filter: a sediment layer and an activated carbon block catch rust, sand, chlorine, and odors to protect the membrane.
Then a built-in pump pushes water through the RO membrane, with pores around 0.0001 micron. Water molecules pass. Dissolved solids, heavy metals, and other contaminants don't. Rejects go to drain.
Because the pump boosts pressure, the G2 can deliver purified water straight to your faucet without a storage tank.
No tank. No stale water. No waiting.
Industry Leadership Certifications
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3 Easy Steps To Complete Transformation
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Enjoy Soft, Clean Water
Experience spa-like water in just moments after installation without worry of hardness or contaminants. Set it and forget it!
See How It Works
WaterDrop Undersink Tankless Reverse Osmosis Water Filter — WD-G2 Series
- Best suited to small homes and space-limited kitchens
- Composite integrated filters deliver more effective filtration
- Tankless design keeps drinking water safer and saves over 70% of under-sink storage space
- Fast 400 GPD flow rate, saving over 300% more water than traditional RO — a genuine 1:1 drain ratio
- Advanced integrated electrical and water circuit design reduces leakage risk
Removable Contaminants
This isn't a light-duty filter. Right out of the gate, it strips out TDS, chlorine, taste and odor, chloramine, scale, and turbidity — the everyday stuff that makes tap water taste off and slowly builds up on everything it touches.
The Heavier Stuff, Handled Too
The Heavier Stuff, Handled Too
Carcinogens:
chromium (hexavalent), chromium (trivalent), cadmium and cadmium compounds, ferric oxide.
Heavy metals:
lead, mercury, barium, copper, radium 226/228, aluminum.
This is where a basic filter pitcher falls short — genuine RO filtration is what actually pulls these out.
And the Stuff You Can't See or Taste
Natural - rivers, lakes
- Storm Water Runoff
- Agriculture Runoff
- Sewage
- Urban Runoff
- Plumbing/ Pipe Residue
- Industrial Waste
- Chemical Treatment
- Road Water Runoff/ Deicing Salt, Etc.
Get Ideal Drinking Water
Standard tap water carries hundreds of Total Dissolved Solids — most homes have no idea how many are actually in their drinking water.
What are TDS?
- Inorganic salts, calcium, potassium, magnesium, and other minerals and cations
- Metals, nitrates, chlorides, sulfates, carbonates
- Contaminants, impurities, and toxins
Where they come from:
natural sources like rivers and lakes, storm water runoff, agricultural runoff, sewage, urban runoff, plumbing and pipe residue, industrial waste, chemical treatment, and road deicing salt.
Safe, Healthy Drinking Water
A quality reverse osmosis system delivers genuinely ideal drinking water for your family. 0 to 50 PPM TDS is the target for ideal drinking water — and that's exactly the range this system is built to hit.
Stop Drinking Pool Water!
Many Americans are drinking 300 to 600 times above the EPA's chlorine health guidelines. More water companies keep increasing their chlorine dosage — and while it helps kill microbes, drinking it at high levels is a real health concern.
What That Actually Means For Your Body
- Forms Trihalomethanes (THMs) — linked to cancer and other issues
- Eye and nose irritation
- Stomach and gut discomfort
- Dry, itchy, flaking skin and dandruff
Built-In Chlorine Removal, No Extra Filter Needed
The WaterDrop G2's five-stage RO filtration removes chlorine right along with everything else on the contaminant list — no separate whole-house filter required.
Note: this corrects a mismatched brand reference on the source page, which cited an unrelated SoftPro whole-house filter here instead of this product's own chlorine removal.
The Nitty Gritty
- Model number: WD-G2-B / WD-G2-W
- Product dimensions: 17.3 x 5.9 x 13.9 inches
- Weight: 20.94 lbs
- Color: White & Black
- Flow rate: 400 gallons per day (GPD)
- Usage environment: Indoor use only
- Wall plug required: Yes
- Materials: BPA-free plastic system cover, metal faucet
- MRO filter: Reverse osmosis membrane & activated carbon block
- CB filter: Sediment PP membrane & activated carbon block
Plugs In, Hooks Up, Done
Designed for a genuinely fast install — push-connect fittings, a compact footprint, and an install video walkthrough that most customers finish in under an hour. Just make sure you've got a wall outlet nearby, since this system runs on power.
Know Before You Buy: Replacement Schedule
- CF (Sediment & Carbon): replace every year or 1,100 gallons
- MRO (RO Membrane): replace every 2 years or 2,200 gallons
Authorized. Legit. No Knockoffs.
Genuine WaterDrop parts. Authorized dealer status. No gray-market nonsense — just the real thing, every time.
Real Experts. No Guessing Games.
You're investing real money in your family's water. We help you get it right — before AND after you buy. Unlike the big box stores, our team recommends the best solution actually available in the marketplace, not just what's sitting in the warehouse.
Stop Guessing. Start Knowing.
Everyone's water treatment needs are different. Our Water Intelligence Engine™ cuts through the guesswork — properly sizing your solution, recommending the right treatment path, comparing all major brands side by side, and grading your local water quality.
WHY BUY FROM US
Real Experts. Real Value.
💧 Real Experts. Real Value.
Our mission is simple: help people live healthier, happier lives with quality water solutions for their families and businesses. We've delivered exactly that across North America since 1990 — better taste, fewer toxins, and no more costly plumbing corrosion or staining.
We carry the best brands in the industry, bundled into packages that make installation and operation genuinely simple.
💧 Your Purchase Does Double Duty
Every purchase through our LoveWater Partnership provides a family with clean water for a full year. Clean water for you. Clean water for someone who needs it. Same order.
💧 Unmatched Expertise
At Quality Water Treatment, you're family, not foot traffic. We know these products inside and out — no wandering a big box aisle hoping to flag down someone who's actually seen an RO system before. We hand you the right equipment for YOUR specific water, shipped straight to your door.
💧 Decades of Experience, Zero Pushy Sales Tactics
After 30+ years in business, we know water treatment like no one else. Our trained water treatment consultants answer every question, compare all major brands, and never push a sale. Live chat, text, phone, email — everything you need is at your fingertips.
💧Delivered to Your Door with Ease
Every order ships within 1–3 business days. No waiting, no hassle, complete transparency on order status — automatic email alerts, trackable anytime.
💧 Affordable Ways to Pay
You deserve clean, filtered water starting now — not "whenever the budget allows." Zip gets you 4 interest-free payments. Affirm breaks it into small monthly chunks.
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5.0 / 5
I just wanted to say thank you for your excellent products and service over the past 12 years.
Daniel R.Verified CustomerTexas
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5.0 / 5
After we installed the Softpro Elite I noticed a significant difference in the house water quality.
Julie M.Verified CustomerFlorida
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5.0 / 5
I decided to go with the Softpro water softener over Fleck. Very impressed and satisfied with their products and customer service!
Roy P.Verified CustomerCalifornia
