Waterdrop Filters Review (Do NOT Buy Before Reading)

Waterdrop G2 vs G3

Both under sink water filters are highly effective against chlorine, chloramines, PFOA/PFOS, cysts, and other contaminants. The Waterdrop G2 has two filters and five filtration stages. The Waterdrop G3 has more robust filtration with three filters, seven stages, filter-life indicator, and a TDS meter.

TL;DR Review Summary: The Waterdrop G3 is an excellent choice for those looking for effective contaminant filtration, long filter life, and low cost of ownership. Easy installation, helpful customer support, and generous warranty coverage make it a compelling option.


Safe drinking water is essential in any household. Tap water doesn’t cut it, which is why Waterdrop Filters created their award-winning filter systems. With their under sink water filters, you can make your tap water safe for drinking and cooking easily. However, there are multiple Waterdrop filters to choose from, so which one is best? In this review, we’ll compare the Waterdrop G2 vs G3 filtration systems.

Most under sink water filters are cheap because they do not include reverse osmosis or tankless designs. They are very bulky with large storage tanks and multiple water lines. The major difference with Waterdrop is that the company listened to customers and designed something that included a tankless, compact design and a reverse osmosis stage.

Here are some of the benefits unique to Waterdrop’s line of filters.

Multi-Stage Reverse Osmosis

One of the features that set Waterdrop models apart from other filtration systems is their unique reverse osmosis stage. Both G2 and G3 provide multi-stage filtration with a proprietary reverse osmosis membrane. It removes all micro particles as small as 0.0001 μm improves water alkalinity.

RO membranes remove 99% of all contaminants. In fact, both the G2 and G3 remove over 1,000 toxins, ranging from chlorine and fluoride to lead and arsenic. You can enjoy purified, smooth-tasting water that’s more alkaline thanks to this type of filtration as well.

While both the Waterdrop G2 and G3 have reverse osmosis membranes, the G3 has 7 stages of filtration while the G2 only has 5 stages. We explore more of these differences in each of the following product reviews.

Strong Filter Life

With a filtration system, you should always look at filter life. Most water purification systems require you to replace filters every 3 to 6 months. Waterdrop has multiple filters. The composite filters need to be replaced once a year, and the RO membrane should be replaced within 2 to 3 years.

The G2 design has less filters but it’s the same replacement time for the carbon block filter and RO membrane.

Easy Maintenance

The tankless design means that your Waterdrop filter won’t have the same problems with mold, mildew, and other contamination as other water filters. The plug and play filters make it easy to keep the case and inside clean without having to take apart the case.

Support and 1-Year Extended Warranty

Customer support is a huge necessity with any household appliance, particularly something as unique as a water filter. With online and phone support, Waterdrop has one of the best product support teams of all water filtration companies.

It’s easy to get ahold of customer support when you need to resolve issues or ask questions, and there’s also a video channel that provides installation help.

Waterdrop also provides warranties for its filters and system. There’s a one-year warranty on the composite filters as well as a two-year warranty on the reverse membrane filter.

You can easily replace all filters and any malfunctioning parts within the first year of owning the water filter. So far, we’ve had zero issues with either system. Customers also review both the G2 and G3 with high scores and praise.

Quick and Straightforward Installation

Some under sink water filters have multiple lines and require multiple hours to install. That’s not the case with Waterdrop, and it shouldn’t be the standard in this market.

Thanks to video help and quick installation design, you only need about 15 minutes to install the Waterdrop filtration systems. The best part is that you don’t need plumbing experience to install these filters, and Waterdrop also includes all of the hardware necessary to complete the installation.

The installation is the same for the G2 as the G3. Both include a water line hookup and a second faucet. However, the system has to be plugged into electricity for each of these filters to work properly.

Waterdrop G2

The Waterdrop G2 is an entry-level version of the Waterdrop G3. If you have a smaller household, the G2 is a good water filtration solution. The design is similar design to the G3, but the G2 has a 5-stage water filtration process instead and lacks UV filtration.

The G2 and G3 are tankless reverse osmosis membrane systems. The G2 has a 400 GPD (gallons per day) flow rate and a 1:1 drain water ratio (each gallon of filtered water produces once gallon of wastewater).

The design saves space under the sink, too. Without multiple tanks, the Waterdrop G2 can fit in most cabinets as it’s just 5.7 inches wide. The minimalist design also make it easier to open and close for fast filter replacement, cleaning, and maintenance.

Here’s What We Like About the Waterdrop G2

The first thing you’ll notice about the Waterdrop G2 is that it just looks incredibly sleek and modern with its curved case and simple filter plug-in design. Without a tank, it’s also very lightweight and easy to place under the sink. It also provides an indicator to let you know when the filter needs to be removed.

The 5-stage composite filter and RO membrane filtration process is also very capable. The new composite filter combines carbon block filtration and a reverse osmosis membrane to purify the odor and taste of the water while also filtering out over 1,000 contaminants.

What We Don’t Like

While the G2’s wastewater efficiency (1:1) is far better than industry average, it wastes 66% more water than the new Waterdrop G3P800 model. Users might notice increases in their water bill with heavy usage.

The filtration for difficult water sources, including well water, could be better. The two additional filtration stages and UV filter in the Waterdrop G3P800 shows better performance in removing bacteria and pathogens.

Even with its super sleek, tankless design, there are some things that are unavoidable. For one, you’ll have to install the Waterdrop filter, and like all under sink water filters, the G2 includes a second water faucet. You may need to spend time making space for a second water faucet.

Waterdrop G3P800

The Waterdrop G3 is the newest RO under sink filter from the brand. This version has upgraded composite filters but keeps the same tankless design, flow rate, and drain ratio. This is because both the G2 and G3 are based on the same Waterdrop guarantee: purified water with fast delivery in a lightweight, compact design that doesn’t waste water or have issues with recontamination.

The G3 has a major difference from the Waterdrop G2 filter. With a 7-Stage Deep Filtration Process, multiple composite and carbon block filters purify the taste and odor from your water before it passes through the cleaning RO membrane.

When tested, the G2 and G3 both produced purified drinking water, but there was a slightly better taste with the G3 that is indicative of the higher purification process.

There are also a few more upgrades with the G3. We review some of the best features below.

Feature Analysis

There are three composite filters in addition to carbon filters and an RO membrane with the Waterdrop G3 design. This adds a couple more stages to the Waterdrop G2’s filtration system.

The G2 comes with a metal faucet, but the G3 has a smart faucet that has a light indicator that shows you when filter life is low and must be replaced. There is also a real-time TDS reading with an LED display. It’s more advanced than many other water filters on the market.

In addition, the G3 has more certifications than the G2. It’s FCC approved, NSF-58 and NSF-372 certified, as well as award-winning. The G3 has won the Reddot design award.

The tankless, 7-stage filter design is incredibly easy to set up and get started. It also provides a cleaner case and plug-in filter design that reduces all outside contaminants and maintenance problems.

Here’s What We Like About the Waterdrop G3

There’s a lot to like about the Waterdrop G3. We think that the best feature is the multi-stage reverse osmosis composite filter design. This removes 1,000 contaminants or more, leading to a 99% or higher purified result. When we tested the results, we found that all contaminants were removed, including traces of lead and arsenic.

While the G2 can remove most contaminants, the result has a different taste than the G3. We really found that the purified result with the G3 was much cleaner-tasting and maybe even had a slightly faster delivery.

The 400 GPD flow rate results in fast delivery of purified water. You can easily get clean drinking and cooking water right to your kitchen faucet. In addition, the G3 is incredibly efficient, reducing waste water with a 1:1 drain ratio.

What We Don’t Like

The G3 has the same under sink and second faucet installation as the G2. The system is a little bit bigger due to the additional filters, but you may still need to watch videos to install this water filter.

The G3 has more premium pricing than the G2 due to the higher filtration and smart features. However, the increase in water quality, smart features, and low cost filter replacements make it worth the price.

Final Verdict: We strongly recommend the Waterdrop G3

Both the Waterdrop G2 and G3 systems can purify your water, removing 99% of all contaminants. While both systems have a similar design, the G3 has a 7-stage water filter process that removes more contaminants and purifies the taste so that it’s slightly smoother.

With tankless designs that have a plug-in filter design, you won’t have to worry about maintaining the system or cleaning the filters. However, the G3 has a smart LED indicator of when the filter needs to be replaced.

Overall, you’ll get an incredibly pure drinking water result from either system, but the G3 has more filters and also received multiple certifications, as well as the Reddot Design Award.