We review the Best Countertop Reverse Osmosis Water Filters of 2023. Countertop RO water filters are easy to use, affordable, and require no installation.
Reverse osmosis countertop devices are an excellent way to purify your tap water. They produce ultra-high quality freshly filtered water at the push of a button. They are a great addition to any home.
Pure Water Ions is a reader-supported site. We may earn a small commission if you purchase after clicking on a link. We all have to pay the bills and this helps cover our running costs. Our opinions are our own and our reviews remain independent.
WHAT ARE THE BEST COUNTERTOP REVERSE OSMOSIS WATER FILTERS?
1: WaterDrop G3 RO Water Filter
2: KFLOW Countertop Reverse Osmosis System
3: AquaTru Countertop RO Water Filtration System
4: Xiaomi MRH112 Desktop Reverse Osmosis Water Filter
1: WATERDROP G3 RO WATER FILTER
• Excellent Filtration Performance
• 1,500 Liters Per Day
• Water Softening
• Compact Dimensions
• NSF Tested & CE Certified
BEST COUNTER TOP REVERSE OSMOSIS FILTER 2023
The WaterDrop G3 RO is the best countertop reverse osmosis water filter on the market in 2023. It combines superb water filtration performance with water-softening ability and an impressive output of up to 1,500 liters per day. The device is NSF-tested and CE certified and fits neatly on any kitchen counter thanks to its compact dimensions.
HIGH PERFORMANCE WATER FILTRATION
The WaterDrop G3 employs a seven-stage water filtration system to achieve excellent results. The system includes three composite high-performance reverse osmosis water filters with a combined 0.0001 rating. This means they remove contaminants larger than 0.0001 microns in diameter. If you’re looking for an RO water filter that delivers high-end filtration to your domestic tap water supply – look no further.
This reverse osmosis device has a flow rate of 1,500 liters of filtered water per day. That’s more than enough filtered water for even the most demanding home settings. The 1,500-liter capacity will meet the needs of families, small companies, and even sports teams. It also has a lower wastewater output compared to other leading RO devices. With a filtered water to waste water ratio of 1:1, you’ll be producing less wastewater for each glass of filtered water consumed.
The WaterDrop RO water filter doubles as a water softener. Great news for people living in a region supplied with hard water. The device removes calcium and magnesium deposits from the source water, which reduces water hardness. Hard water causes untold damage to home appliances and plumbing systems and reduces the effectiveness of detergents and soaps.
The WaterDrop reverse osmosis filter benefits from a neat and compact design. It’s a great fit for countertops, even ones with limited space. Measuring just 4.3” x 17.5” inches it will find a home on even the most congested countertop. The device does not come with a water storage tank. Instead, freshly filtered water is fed directly to the water faucet. This keeps the space requirement to a minimum and allows the device to be so small.
CERTIFICATION & TESTING
The WaterDrop G3 RO is NSF tested and certified. NSF (National Sanitation Foundation) testing is performed to independently assure customers and regulators that a product complies with specific standards for safety, quality, and performance. It has also been CE certified. This means it has passed the health, safety, and environmental protection standards of the European Union.
The WaterDrop G3 RO is our winner in the best undersink reverse osmosis water filter category 2023. It combines excellent water filtration performance with water-softening capabilities, a neat compact design, and a highly impressive flow rate. It also has the independent certification needed to show it has passed basic safety and testing requirements. And, it’s one of the most competitively priced RO water filters on the market today.
2: KFLOW COUNTERTOP REVERSE OSMOSIS SYSTEM
BEST PRICE: $450
FOUR-STAGE FILTRATION SYSTEM
The KFLOW countertop reverse osmosis water filtration system uses a four-stage filter system. The setup includes a sediment membrane, carbon block filter, and two RO filter membranes.
- Sediment Membrane – polypropylene filter removes physical contaminants such as dirt and small particles.
- Carbon Block Filter – coconut carbon filter removes bad odor and taste, chemicals, and organic matter.
- Double RO Filter – two high-performance RO filter membranes rated 0.0001um remove tiny particles and microbes.
This countertop reverse osmosis system uses long-life RO filters. The filters have a two-year lifespan and will produce 2,970 liters of water over their lifetime.
LIVE PERFORMANCE MONITOR
The device is fitted with an electronic live monitoring system. This means you can see in real-time how the filtration system is performing.
The display indicates the quality of the filtered water using a TDS reading. It also alerts you when the filters need to be replaced.
DOUBLE RO MEMBRANE
Unlike its leading competitors, the KFLOW reverse osmosis water filter uses two RO membranes for best results. The high-performance filters sit next to each other at the end of the filtration cycle.
Their precision 0.0001-micron membranes perform a high-performance water purification step – resulting in great tasting, clean, freshly filtered water.
EASY TO USE
The KFLOW is incredibly easy to use. There are no installation requirements. All it needs is some counter space and a power socket.
All you have to do is top up the water tank when you require fresh filtered water. And, the filter cartridges are easy to access and switch out when they need to be replaced.
FOOD GRADE MATERIALS
All parts that come into contact with water use food-grade materials. This ensures no contamination resulting from contact with the device itself. The machine is also CE certified.
The KFLOW is the best countertop reverse osmosis water filter on the market in 2023. It uses a four-stage filter setup with a double reverse osmosis filtration stage for excellent results.
The live performance monitor is a great feature for letting you know exactly how the unit is performing. The machine is easy to use, requires no installation, and the filters are easy to replace.
3: AQUATRU COUNTERTOP REVERSE OSMOSIS WATER FILTRATION SYSTEM
BEST PRICE: €470
FOUR-STAGE FILTRATION SYSTEM
The AquaTru reverse osmosis water filtration system has been built with a four-stage system. The device houses a sediment pre-filter, activated carbon filter, high-efficiency reverse osmosis filter membrane, and a final activated coconut shell filter.
The AquaTru RO filters are built to last for 600-1200 gallons. While this is a good life expectancy, they don’t last as long as the filters in the leading models above.
Depending on your water usage you can expect to have to switch them out in 6-12 months. A digital display on the front of the device will alert you when it is time to change the filters.
This RO filtration system is IAPMO certified. The International Association of Plumbing and Mechanical Officials, (IAPMO), is North America’s plumbing certification agency and the device has been certified to NSF/ANSI standards.
The National Sanitation Foundation (NSF) is a global independent public health and environmental organization, and the American National Standards Institute, (ANSI), oversees the development of standards for manufacturing procedures in the United States.
The AquaTru reverse osmosis water filtration system requires no installation and can be set up on your countertop in minutes. No plumbing is required – just access to an electrical power supply.
REMOVABLE DISPENSING TANK
The water dispensing tank can be removed from the device after your water has been filtered. This means you can chill it in the fridge until it’s needed. The tank is made from BPA-free plastic.
The AquaTru has a sleek, attractive, compact design. It measures 14” x 14” x 12” inches in size and has a 3 quartz water storage capacity. It will fit neatly on any countertop.
The device comes with a one-year limited warranty that covers defective parts and workmanship. The manufacturer will repair or replace any defects but will apply a shipping and processing fee for the repair.
The AquaTru reverse osmosis water filtration system is a solid all-rounder. It uses a four-stage water filtration system, with a single RO filter membrane. We love the removable water reservoir which allows you to chill your filtered water in the fridge. The AquaTru is IAPMO certified to NSF/ANSI standards and it comes with a 1-year limited warranty.
4: XIAOMI MRH112 DESKTOP REVERSE OSMOSIS WATER FILTER
BEST PRICE: €415
SIX STAGE FILTRATION SYSTEM
The Xiaomi reverse osmosis water filter comes with a six-stage water filtration system. It is designed with a PP cotton layer, activated carbon filter, scale inhibitor, RO membrane, carbon fiber filter, and a non-woven fabric post-filtration layer.
Although it doesn’t employ a double reverse osmosis membrane like the KFLOW filtration system, it is still an excellent setup. The device produces 8.4 fluid ounces of filtered water per minute.
The device comes with a handy water heating feature. This is great for making tea and coffee in seconds with your freshly filtered water.
The Xiaomi heats water in just 3 seconds within a temperature range of 40-95° Celsius. The temperature adjustment is accurate to 1°C.
OLED DISPLAY SCREEN
The Xiaomi MRH112 comes with a sleek-looking OLED display screen. It gives real-time information on the water mode, temperature, water volume, and filter life.
It’s great for seeing how the system is performing as you filter your water. There is also a ‘change water’ alert if the TDS levels become too high.
ONE YEAR RATING
The filter cartridges are rated for one year’s use or 2,000 liters of purified water. This means you’ll need to replace the filter cartridges every 12 months.
This filtration system is a countertop RO water filter – meaning it does not require any installation. Just plug it in at add water as you go. There’s no need to call in a plumber and you’ll be up and running in minutes.
The Xiaomi reverse osmosis countertop water filter is an excellent all-rounder. It delivers great filtration results using a six-stage filter setup. We love the water heating feature – which is a great bonus for coffee and tea lovers.
The device requires no installation, just a power supply, and is easy to use. The OLED display screen gives up-to-date performance metrics and the filters are rated for 12 months or 2,000 liters.
WHAT IS A COUNTERTOP REVERSE OSMOSIS WATER FILTER?
A countertop reverse osmosis filter is the simplest, easiest to use, and best performing home water filtration system. They require no installation and purify your water supply to a much higher level compared to other filter types.
All you need to do is find some counter space. Then, plug it in and top it up with regular tap water. The reverse osmosis filter removes up to 99% of all impurities, leaving you with great-tasting, clean, filtered water.
BEST ALKALINE WATER MACHINES – click here
IONIZED WATER FILTERS – click here
ALKALINE WATER PITCHERS – click here
HOW DO THEY WORK?
An RO filter cleans tap water by pushing it through a semi-permeable ‘reverse osmosis’ membrane. The membrane is designed to allow water to pass through but filter out almost all impurities.
Reverse osmosis is a highly effective form of water filtration. Countertop devices contain multiple filtration steps to achieve the best results.
Typically there are four filtration steps in a reverse osmosis water filter, sediment filter, carbon filter, reverse osmosis filter, and polishing filter.
There are two types used in the home setting – counter top filters and undersink reverse osmosis filters.
FOUR STAGE REVERSE OSMOSIS FILTER SET-UP
1: SEDIMENT FILTER
This is a basic pre-filter stage. It is a crude filter that removes dirt, sediment, and significant particles from the water. It protects and prolongs the lifespan of the carbon and RO filters.
2: CARBON FILTER
The carbon filter is more sophisticated. It removes smaller particles and impurities by trapping them inside an activated carbon filter. These impurities are removed before the water reaches the RO membrane.
3:REVERSE OSMOSIS MEMBRANE FILTER
The reverse osmosis membrane is the powerhouse of the filtration system. It is designed with tiny pores that allow the water to pass through but block almost all other impurities.
4: POLISHING FILTER
Four-stage filtration systems are fitted with a ‘polishing filter’. This step is not essential but it is used to improve the taste and aroma of the water before it is dispensed for consumption.
BENEFITS OF A COUNTERTOP RO FILTRATION SYSTEM
EXCELLENT WATER PURIFICATION
The key benefit of a countertop reverse osmosis water filter is they are excellent devices for purifying your home water supply. This means you will have fresh, healthy, clean water at your disposal 24 hours per day.
A reverse osmosis filter removes contaminants from your drinking water by forcing it through a semi-permeable filter membrane. This process removes up to 99% of all impurities including fluoride, chlorine, lead, and dissolved salts.
GREAT TASTING WATER
Reverse osmosis filtered water tastes great. It removes any lingering aromas and impurities. Once you’ve tried it you’ll instantly taste the difference.
It is a cleaner, purer form of your home water supply. It is a great choice for drinking, cooking, and preparing food.
Once you begin using a counter top reverse osmosis system you will begin saving money. All you need to add is your regular tap water.
You will no longer have to buy expensive bottled water. The filtration system will clean and purify your regular home water supply, making it a great choice for drinking and cooking.
EASY TO USE
Countertop reverse osmosis filtration systems are incredibly easy to use. There is no complicated installation.
They can be placed anywhere on your kitchen counter and do not need to be plumbed into your water system. All you need to do is keep it topped up so you have a regular supply of freshly filtered RO water at your disposal.
Not only are they easy to use, they are also easy to maintain. There are no moving parts in an RO filter and all you’ll need to do is periodically replace the water filters.
Every water filter has a limited lifespan and needs to be replaced when it reaches the end of its run. Check out the user manual for your RO device for instructions on when and how to replace the filter membrane.
SHOULD I BUY A COUNTERTOP REVERSE OSMOSIS WATER FILTER?
Yes, a countertop reverse osmosis water filter is an excellent investment. They produce ultra high-quality filtered water at the push of a button. These devices are easy to use and require no installation. All you need to do is place them on your countertop and plug them into your electrical power supply.
All you need to do is add your regular tap water and the machine takes care of the rest. Reverse osmosis filtration performs a very high standard of water purification.
Countertop RO filtration systems produce clean, clear, great-tasting water. The machines are easy to maintain and will save you money in the long term. You will no longer need to buy expensive bottled water – you can use your regular tap water supply instead.
• BEST UNDERSINK WATER IONIZERS – click here
COUNTERTOP REVERSE OSMOSIS WATER FILTER FAQ
WHAT ARE THE BENEFITS OF RO WATER?
The benefits of RO water are its high level of purity. Reverse osmosis is a highly efficient water filtration method that removes many contaminants and toxins from water. Reverse osmosis water is used to filter water so that it is safe to drink.