An undersink water filter is a straightforward solution to serious water quality issues. But traditional reverse osmosis systems are bulky, and when space is tight, they’re not a good fit — in some kitchens, the tank won’t squeeze under the pipes at all.
If losing storage space to a filter tank is all that stands between you and safer water, we’d like to tell you about a revolutionary tankless purification system by Waterdrop — it removes more than 1000 potentially hazardous contaminants in less than six inches of space.
Let’s take a closer look at why the Waterdrop WD-G3-W may be the best under sink water filter for your home.
Waterdrop WD-G3-W Under Counter RO Water Filtration System
Reverse osmosis systems are the gold standard for water purification. No other type of filter removes as many harmful contaminants, and this cutting-edge model by Waterdrop is no exception.
Three filters provide seven stages of filtration, removing 90-percent or more of toxic heavy metals, including mercury and lead — plus a host of chemicals like chlorine that make water taste and smell bad.
Unlike most RO systems, an internal pump bolsters capacity, filtering a cup of water in 12 seconds — the WD-G3-W is among the fastest filters in the industry. Your morning coffee never has to wait.
The WD-G3-W is simple to install and works quietly. Maintenance is minimal, and you’ll waste less water with its low 1:1 drain ratio — it’s environmentally friendly and cost-effective. The patented lead-free Smart faucet verifies the system is working, so you’re never in doubt.
Waterdrop backs its filters with a 1-year warranty and lifetime tech support. Drink healthy, rest easy.
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| Pros | Cons |
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Top Q & A
Q: Does this filter remove fluoride?
A: Yes, up to 98-percent.
Q: How often should filter cartridges be changed?
A: The system comes with three filters. Change the CF cartridge every six months, the CB filter every 12 months and the RO membrane every two years. An indicator light on the Smart faucet tells you when it’s time.
Q: Can I use this for well water?
A: Maybe. Well water tends to contain large particles that may clog delicate RO membranes, so installing a sediment pre-filter is a must. Some wells also lack sufficient water pressure for the system to work as designed — 14.5-87 psi is required. Consult with a technical support representative before ordering.
My Take
RO filters remove the highest possible level of contamination, but conventional systems are challenging. Tanks take space, require regular cleaning, and their capacity limits how much filtered water you can have in reserve — some systems struggle to make enough for a family’s daily needs. The tankless WD-G3-W solves these problems and more.
It filters up to 400 gallons of water on-demand daily, and the flow rate is exceptional — fill glasses in seconds, not minutes. Installation couldn’t be simpler for the do-it-yourself, and filter changes are a breeze. In terms of simplicity, you won’t find an easier system to operate — and since it doesn’t require plumbing alterations, it’s apartment-friendly.
Waterdrop filters are built to last from quality components and are independently certified to be lead- and BPA-free — how’s that for safety? Kits come with everything you need for installation — instructions are crystal-clear, and there’s a video on YouTube to walk you through the process step-by-step. Waterdrop’s WD-G3-W is an excuse-proof investment in your health.
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Waterdrop WD-G3-W Review Performance Features
Water filters may look alike, but their performance features make a difference. Is the WD-G3-W the best under sink water filter for your unique needs? Let’s find out.
The Waterdrop WD-G3-W removes these substances and hundreds more:
- Chlorine
- Chloramine
- PFOA
- PFAS
- Lead
- Mercury
- Arsenic
- Fluoride
- Chromium
- Trichloromethane
- Minerals
- Pesticides
- Herbicides
- Industrial chemicals and pharmaceutical residues
Total dissolved solids (TDS) are lowered more than 90-percent — water not only tastes pure, it is.
The WD-G3-W can also make water biologically safe to drink under normal circumstances — it removes the most common bacteria and parasites, making it an ideal backup system in areas where water sanitation is unreliable.
Capacity
The term “capacity” can mean two different things with RO systems. First, it reflects how many gallons they filter per day. The average American requires up to 10 gallons daily for drinking and cooking. The WD-G3-W filters up to 400 gallons — plenty for the largest family including travel bottles. Traditional systems may produce 50 gallons or less.
Capacity can also refer to the number of gallons filtration systems can process before individual filters must be changed. Some companies rate their cartridges and membranes by the gallon, but results can be disappointing. The more contaminated water is, the more frequently cartridges must be changed.
For average water, Waterdrop estimates CF cartridges will last six months, CB filters should last twelve, and the premium Dow RO membrane will last approximately two years. Replacements are affordably priced.
Micron Rating
Mechanical water filters, including RO systems, strain contaminants through microscopic pores measured in microns — millionths of a meter. Waterdrop’s RO membrane excludes all particles greater than 0.0001 microns — that’s small enough to remove most bacteria and other microorganisms.
Flow Rate
Filtering water takes time, and RO systems are notoriously slow. Waterdrop remedied that problem by adding an internal pump to boost the flow rate. The average RO filter can process a maximum of 0.03 gallons per minute — that’s a long wait for a cup of water. The WD-G3-W’s flow rate is 0.28 gallons per minute — almost ten times faster.
Design and Installation
Waterdrop engineered their filters for easy installation, requiring only three connections to the water supply, faucet and drain — a separate kit is available if you want to run a line to your refrigerator. Most homeowners report it takes less than an hour to set up.
The sole challenge is installing the faucet that comes with the kit — RO systems don’t work with standard fixtures. Most modern sinks have an extra hole pre-drilled and ready to use, but if yours doesn’t, cutting it can be tricky if the sink is made of high-end material such as granite. Only a professional should cut specialty stone.
Help and Support
Waterdrop filtration systems come with a 1-year warranty and a commitment to service. Customer care representatives and technical support specialists are available via phone or e-mail to answer all your water filtration questions.
Final Thoughts
Even the clearest water can harbor invisible toxins — experts are now discovering alarming new chemicals in our water supplies. Is drinking it worth the risk? Before resorting to budget-busting bottled water, consider the cost and health benefits of a quality filtration system from Waterdrop.
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