Written by: Alexandra Uta // Last Updated:
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Waterdrop sells 2 reverse osmosis systems that are highly popular at the time of writing this review. One is the WD-G3-W and the other the WD-G2 (the latter is available in 2 different colors). Both are tankless under sink systems meaning they filter water on-demand instead of storing it in a bulky tank. This saves quite a lot of space, and, although not that important, it looks better, too.
On top of that, in order to provide water safe for drinking the Waterdrop WD-G3-W and the WD-G2 remove more than 1,000 harmful contaminants, says the company. Sounds far-fetched? Let’s find out!
|Filtered Water:||0.28 Gallons Per Minute|
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We’ll start with the WD-G3-W. It uses the following filter layers/stages:
As far as the WD-G2 is concerned, it only uses 2 filter elements instead of 3. And one element is smaller compared to the WD-G3-W which is why the system is even slightly more compact:
We can expect the same water contaminants to be reduced as with the WD-G3-W, but at lower rates.
What about the claim that Waterdrop reverse osmosis systems remove more than 1,000 harmful contaminants? Well, that one’s easy; at least for the WD-G3-W unit which is NSF Standard 58 certified – for 91.9% TDS, 96.9% chromium 6, and up to 99+% VOCs rejection. This may not be the most comprehensive testing but we have little doubt that both systems effectively remove a wide range of chemicals, heavy metals, salts, etc. Still, we always prefer thorough testing against NSF standards.
Min/max required feed water pressure: 14.5-87 psi.
The Waterdrop WD-G3-W – learn more on waterdropfilter.com
Waterdrop says their under sink reverse osmosis systems can be installed within 30 minutes. We think 1-2 hours is probably more realistic – still fast!
You shouldn’t have any problems completing the project if you’re handy around the house and have the necessary tools. Just follow the provided instructions. You’ll need a drill for the hole to accommodate the extra faucet (unless there already is a second hole in your sink or countertop) and you also have to drill into your drain pipe for the drain line connection.
Another critical step is turning off the cold water supply so that you can install the feed water adapter.
Once everything is up and running, you need to flush the system for 30 minutes. The WD-G3-W’s smart faucet will stop blinking afterwards. The front panel screen will also start displaying the TDS reading. As for the WD-G2, the indicator lights on the front panel will change from flashing to permanent blue once the process is completed.
Not sure if you can do this? Check out this helpful installation video:
Like we said, replacing any of the filter elements on a Waterdrop RO system is child’s play. It literally takes less than 10 seconds. Simply remove the old cartridge by turning it counter-clockwise. Then install the new filter by turning clockwise. That’s all!
Oh, and remember to reset the filter life indicator. You can simply follow the instructions in your manual. It’ll also tell you about flushing requirements.
What are the annual cost? We estimate about $115 for the WD-G3-W and roughly $65 for the other. By the way, the manufacturer recommends biannual/annual replacement:
Waterdrop WD-G3-W filters:
Waterdrop WD-G2 filters:
A manual for the larger Waterdrop reverse osmosis system is linked in this product description here.
A manual for the smaller Waterdrop reverse osmosis system is linked here.
Chloramine, cadmium, lead, mercury, barium, copper, radium 226/228, aluminum, cysts, arsenic, fluoride, asbestos, benzene, nitrate, nitrite, PFAS – Waterdrop lists all these contaminants and more saying they’ll be removed by their tankless RO systems, but to what percentage?
Furthermore, a few people reported that they have to drain about 1 gallon of water before their TDS panel reads about 10 to 30 ppm. Not using the system for more than 1 hour leads to a TDS above 100 – think TDS creep.
The Waterdrop WD-G3-W is among the highest priced reverse osmosis systems we know, and the WD-G2 isn’t exactly cheap either! And yet still, people love the sleek design, they love the simple install, they love the quick filter replacements, and they say the water taste is fantastic.
In our opinion, both are worth 4 stars. The only reason why we choose the Waterdrop WD-G3-W as our #1 tankless reverse osmosis system is because we have actual NSF certifications.
Both systems are best for people who want a compact tankless RO system that’s easy to use, effective, and fast.
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This completes our Waterdrop review. Questions? Ask away!