Skip to content

Best Tankless Reverse Osmosis Systems: Water Drop Brand Review


When it comes to ensuring clean and safe drinking water, reverse osmosis systems are a popular choice among homeowners. These systems offer a convenient and efficient way to purify water without the need for bulky tanks. Instead, they use a series of filters to remove impurities and contaminants from the water.

One of the main benefits of a Tankless Reverse Osmosis System is that it provides a continuous supply of purified water. Traditional RO systems use a storage tank to store purified water, which can run out if not refilled. With a tankless system, there is no need to worry about running out of purified water. Additionally, tankless systems are often more efficient and use less water than traditional systems.

Understanding Reverse Osmosis Systems

Reverse osmosis (RO) is a water filtration process that removes impurities from water by pushing it through a semipermeable membrane. The membrane allows water molecules to pass through while blocking larger molecules, such as dissolved salts, minerals, and other contaminants. RO systems are among the most popular types of water filtration systems because they are effective at removing a wide range of impurities from water, including bacteria, viruses, and chemicals.

RO systems typically consist of several stages of filtration, each designed to remove specific types of impurities from water. The exact number of stages can vary depending on the system, but most RO systems have at least three stages of filtration. The first stage typically involves a sediment filter, which removes larger particles from water, such as sand, silt, and rust. The second stage often involves a carbon filter, which removes chlorine and other chemicals that can affect the taste and odor of water.

The third stage is the heart of the RO system: the semi-permeable membrane. The membrane is designed to remove dissolved solids and other impurities from water, such as lead, arsenic, and fluoride. The membrane is typically made of thin sheets of material, such as cellulose acetate or thin-film composite, and is capable of removing up to 99% of impurities from water.

In addition to these three stages, many RO systems also include additional stages of filtration, such as a post-carbon filter or a remineralization filter. These filters help to improve the taste and quality of water, as well as to restore some of the minerals that are removed during the RO process.

Choosing The Right Brand

800 GPD Tankless RO System with UV Sterilizing Light - Waterdrop G3P800

Among the many brands of tankless reverse osmosis systems available on the market, Waterdrop stands out as a top performer. Their G3P800 system has been named the best overall and efficiency ratio by With a 3:1 efficiency ratio and seven stages of filtration, the G3P800 can produce up to 800 gallons of clean water per day.

Another highly recommended Waterdrop system is the G3P600, which has been rated 9.70/10 by This European brand uses eight stages of filtration to remove the most contaminants from water. The G3P600 is a great option for those looking for unbeatable filtering ability. With so many options available, it's clear that Waterdrop is a brand that homeowners can trust for their tankless reverse osmosis system needs.

Top Features of Water Drop Tankless Reverse Osmosis Systems

The European Brand Water Drop’s products are known for their compact design, efficient water purification, and easy installation and maintenance. Here are some of the top features of Water Drop tankless reverse osmosis systems:

Compact Design

Water Drop tankless reverse osmosis systems are designed to be compact and space-saving. They are ideal for small apartments, RVs, and boats. The Water Drop G3P800, for example, has a slim design that can fit under most kitchen sinks. It also comes with a smart LED display that shows real-time water quality and filter life.

Efficient Water Purification

Water Drop tankless reverse osmosis systems use an advanced filtration process that removes up to 99% of contaminants from water. Their systems have seven to eight stages of filtration, which include sediment filtration, pre-carbon filtration, reverse osmosis filtration, and post-carbon filtration. The Water Drop G3P800 has an efficiency ratio of 3:1, which means it produces three gallons of clean water for every one gallon of wastewater.

Easy Installation and Maintenance

Water Drop tankless reverse osmosis systems are easy to install and maintain. They come with everything you need for installation, including a user manual, tubing, and a faucet. Their systems also have a quick-change filter design, which means you can replace the filters without any tools or hassle. The Water Drop G3P800, for example, has a filter life of 12 months, and the replacement filters are readily available.

Comparing Water Drop with Other Brands

One of the main reasons why Water Drop is a top choice is its efficiency ratio. The Water Drop G3P800 has an impressive efficiency ratio of 3:1, which means it can produce up to 800 gallons of pure water per day while wasting only a small amount of water. This is significantly better than other brands that have an efficiency ratio of 1:1 or 2:1.

In terms of pricing, Water Drop is an affordable option that offers excellent value for money. While there are other brands that are cheaper, they may not offer the same level of quality or efficiency as Water Drop.

Overall, Water Drop is a reliable and efficient brand that offers high-quality tankless reverse osmosis systems. Its seven stages of filtration, high efficiency ratio, and user-friendly design make it a top choice for homeowners who want clean and healthy water.

Benefits of Using Water Drop Tankless Reverse Osmosis Systems

G3P600 Reverse Osmosis System - Waterdrop G3P600

When it comes to water filtration systems, Water Drop offers a range of tankless reverse osmosis systems that provide numerous benefits. In this section, we will discuss the top three benefits of using Water Drop tankless reverse osmosis systems.

Improved Water Quality

Water Drop tankless reverse osmosis systems are designed to remove impurities and contaminants from water, resulting in improved water quality. These systems use a multi-stage filtration process that removes up to 99% of impurities, including chlorine, lead, arsenic, fluoride, and more. The result is clean, fresh-tasting water that is safe for consumption.

Space Saving

One of the biggest advantages of Water Drop tankless reverse osmosis systems is their space-saving design. Unlike traditional reverse osmosis systems that require a large storage tank, Water Drop systems are tankless and compact. They can be easily installed under the sink, taking up minimal space and leaving more room for storage.

Energy Efficiency

Water Drop tankless reverse osmosis systems are also energy-efficient. Traditional reverse osmosis systems require a lot of energy to pump water through the system and to maintain water pressure in the storage tank. In contrast, Water Drop systems only use energy when water is being filtered, resulting in lower energy consumption and lower energy bills.

Customer Reviews and Feedback

Many customers have left positive reviews and feedback about the products. One customer praised the Waterdrop RO Reverse Osmosis Drinking Water Filtration System for its easy installation process and great tasting water. They noted that the system was able to remove impurities and contaminants from their water, leaving it clean and refreshing.

Another customer on gave the Waterdrop G3P600 system a 9.7/10 rating, citing its unbeatable filtering ability and eight stages of filtration. They also noted that the system was easy to install and maintain.

Customers have also praised Waterdrop's customer service, noting that they were responsive and helpful when they had questions or concerns.

In a nutshell, Waterdrop's tankless reverse osmosis systems have received positive feedback from customers for their effectiveness, ease of use, and customer support.


After extensive research and testing, it is clear that the Waterdrop brand offers some of the best tankless reverse osmosis systems on the market. The Waterdrop G3P800 model stands out as the best overall choice due to its high efficiency ratio, seven stages of filtration, and impressive production rate of 800 gallons per day.

The Waterdrop G3P600 model is also a great option for those looking for a tankless system, as it boasts an eight-stage filtration process and a production rate of 600 gallons per day.

Ultimately, the choice of which tankless reverse osmosis system to purchase will depend on individual needs and preferences. However, with the Waterdrop brand's impressive performance and reliability, it is a safe bet for those looking for a high-quality system that will provide clean, refreshing water for years to come.

View our collection of Water Drop products >>

Next article Importance of Reverse Osmosis for Bottling Companies: Ensuring High-Quality Water for Bottled Beverages