Reverse osmosis systems are available for various housing installations. The whole house reverse osmosis system is installed at the point of entry, while the under sink reverse osmosis system is installed at the point of usage, and the countertop reverse osmosis system requires no installation and is placed on the tabletop, kitchen sink top, or water filter stand.
The countertop RO system is portable, so you can take it with you wherever you go. It is also known as a portable reverse osmosis system.
It is also known as a tabletop reverse osmosis system.
In this article, we will discuss the best countertop reverse osmosis system.
What is the countertop reverse osmosis system?
The countertop RO system does not require installation or drilling, so the system is placed on the countertop or tabletop. Also, like the under-sink RO system and the whole house RO system that has a tank, the countertop RO system is tankless.
It has a compact design that fits your countertop, water filter stand, office desk, night table, and granite.
This is the best system for people with small homes, travelers, students, and renters who cannot make a change in their plumbing. You can use countertop RO in rented apartments, condos, hotel rooms, RVs, college dormitories, or when on the go.
How does the countertop reverse osmosis system work?
Most countertop reverse osmosis systems utilize a 4-stage filtration system. Some come with a pitcher/dispenser that you fill with untreated water.
With a touch of the button, your unfiltered water passes through the filtration and you have pure water.
Others come with a diverter for kitchen faucets that helps connect to the most standard faucets without the use of any tool.
Our top pick in 2022
- KFLOW Countertop RO Water Filter (KFL-ROPOT-180)
- Frizzlife Countertop RO water filter
- Reverse osmosis revolution Countertop Portable
- APEC Water Systems RO-CTOP Portable Countertop Reverse Osmosis Water Filter System
- APEC Water Systems FILTER-SET-CTOP (Stage 1-2)
- Express Water Countertop Reverse Osmosis Water Filtration System
- OnliPure Zero Installation Purifier Reverse Osmosis Countertop Water Filter
- AQUA TRU Countertop Water Filtration Purification System
- SimPure Y5 Instant Heat Reverse Osmosis Water Filtration System
- Waterdrop Countertop Reverse Osmosis Water Filtration System
Countertop reverse osmosis system reviews
KFLOW is a 4-stage countertop reverse osmosis water filter system. The 4-stage includes
Stage 1: Polypropylene Filter-it helps remove dirt, corrosion, sediment, sand, and any other physical particles. Its working pressure is 0-0.4 Mpa and its temperature range is 0–40°C. The filtration precision is 5 μm.
Stage 2: Coconut Carbon Block Filter (CTO)-it removes any additional chlorine and organic matter. Its working pressure is 0.1–0.4 Mpa and its temperature range is 4–40 °C. Filtration precision is 0.5μm.
Stage 3: Reverse Osmosis Membrane (R.O. Membrane). The membrane is certified by the CE. It helps remove bacteria, viruses, heavy metals, harmful microorganisms, antibiotics, and any other harmful substances. Filtration precision is 0.0001μm.
Stage 4: Rear Coconut Carbon Block Filter (CCF). Improve the taste of the pure water to light sweet. Its working pressure is 0.1–0.4 Mpa and its temperature range is 4–40 °C.
A reverse osmosis filter can be used for 2 years, a PPF filter can be used for 1 year, and front and rear carbon block filters can be used for 1 year.
This system adopts recycling multi-filtration technology, meaning the water left after filtering is not hastily classified as waste, but will be recycled for the next round of filtration by adding water. It helps save water wastage compared with the convectional RO system.
The KFLOW RO system features an electronic filter indicator that helps you remember the remaining life of the filter and notifies you when the filter needs to be replaced.
When it comes to a filter change, no tool is required. Its spiraled filter system makes filter replacement an easy thing.
This water filter is certified by European Conformity and all materials in this countertop water filter are food-grade-level standards.
Kflow replacement filter and membrane
KFLOW Water Filter 1st Stage Replacement for KFLOW Countertop Water Filter KFL-ROPOT-180
KFLOW Water Filter Replacement, 2nd Stage – Coconut Carbon Block Filter (Front CTO) for KFLOW Countertop Water Filter KFL-ROPOT-180
KFLOW RO Water Filter Replacement, 3rd Stage-Reverse Osmosis Membrane (R.O. Membrane)
KFLOW Water Filter Replacement, 4th Stage-Rear Coconut Carbon Block Filter (Rear CCF) for KFLOW Countertop Water Filter KFL-ROPOT-180
Frizzlife Countertop RO water filter is a 4-stage system. The stages include:
Stage 1: High-grade sediment filter that helps block fine debris and reduces particles such as sand, silt, and rust.
Stage 2: High-grade coconut carbon that helps reduce chlorine and chloramine
Stage 3: 0.0001-micron reverse osmosis membrane that gets rid of 1000+ contaminants, including lead, heavy metals, fluoride, mercury, VOCs, chloramine, arsenic, and more.
Stage 4-Granular active carbon filter with high-grade acid washed coconut shell carbon that helps reduce organic compounds in water, unpleasant taste and odor, and polishes the flavor.
This system is backed by advanced drain water recycling technology. The pure water to drain water ratio can reach 5:1. Therefore, it saves water waste by up to 1500% compared to conventional RO systems.
Frizzlife Reverse Osmosis Water Filtration System requires no installation and the twist-in filter system makes the filter replacement a breeze.
It features a built-in smart screen that plays the role of a reliable and intelligent indicator. It tells you the remaining lifespan of each filter cartridge and the real-time in-and-out TDS. The intelligent indicator changes color to red when it is time to refill your filling tank.
Frizzlife Replacement filter and membrane
Frizzlife W5002 Water Filter Replacement Cartridge For WA99 RO Reverse Osmosis System – 1st Year Replacement Cartridge Set (2 Pack)
The Frizzlife W5002 Water Filter Replacement Cartridge includes a 5-micron polypropylene sediment filter and a carbon block filter with high-grade coconut carbon.
The 5-micron polypropylene sediment filter reduces particles such as rust, dirt, sand, silt, and insoluble impurities. It lasts for 1500L or 6 months.
The carbon block filter with high-grade coconut carbon reduces chlorine, organic chemicals, unpleasant tastes, odor, cloudiness, and color. The filter lasts for 1500 liters or 6 months.
These are the only two filter cartridges you need to change in the first year of use since the RO membrane is changed once a year.
Replacement of the filter requires no tool. The system utilizes a twist-in filter system, making replacement easier.
FRIZZLIFE W5006 Water Filter Replacement Cartridge For WA99 RO Reverse Osmosis System – From Second Year Replacement Cartridge Set (6 Pack)
The FRIZZLIFE W5006 Water Filter Replacement Cartridge includes 6 Cartridges in Total: 2 Polypropylene Sediment Filters, 2 Block Carbon Filters, 1 Reverse Osmosis Membrane, and 1 Granular Active Carbon Filter.
The set guarantees pure water throughout the year.
The Reverse Osmosis Revolution countertop system attaches to your kitchen faucet without the need for a plumber.
It treats water through five stages. The stages include:
1st stage: Premium Quick-Connect 5 micron sediment filter It helps remove dust and rust particles. This also helps extend the life of the system and the membrane.
2nd stage: Premium Quick-Connect T28 coconut activated carbon filter — It reduces VOCs (volatile organic compounds), chlorine, cloudiness, offensive odors, colors, and unpleasant tastes.
3rd stage: Premium High Rejection TFC type reverse osmosis membrane (made in the USA). It removes 96%-99% of total dissolved solids (TDS), Arsenic, fluoride, lead, chromium, radium, viruses, bacteria, and more. The membrane produces 75/100 gallons per day capacity.
4th stage: deionizing mixed bed polishing filter made by Omnipure (USA). This stage produces exceptionally clean water with a minimum TOC background and is a perfect fit for the removal of radiation.
5th stage: Premium Coconut Carbon T33 type filter cartridge.
The system comes with a chrome metal 2-way diverter for kitchen faucets by default. The diverter works with all types of faucets except sprinklers or pull-down faucets.
The APEC Water Systems RO-CTOP Portable Countertop Reverse Osmosis System fits most standard faucets. It’s not compatible with pull-out faucets, special-sized designer faucets, or sprayer faucets.
The system treats water in four stages that include:
1st stage: premium quick-connect 5-micron sediment filter that helps remove dust, particles, and rust. It also protects and extends the life of the membrane.
2nd stage: premium quick-connect coconut shell activated carbon filter – It helps get rid of unpleasant VOCs, chlorine, odors, cloudiness, and colors.
3rd stage: Select FILMTEC (Dow Chemical) high rejection TFC reverse osmosis membrane. It removes up to 99% of total dissolved solids (TDS) and contaminants such as arsenic, lead, fluoride, chromium, radium, and much more.
4th stage: premium quick-connect coconut shell activated carbon filter -removes any possible residual tastes.
APEC water system Replacement filter and membrane
The APEC Water Systems FILTER-SET is a replacement filter for RO-CTOP and RO-CTOP-PH. It is compatible with all countertop reverse osmosis systems.
It includes sediment and a coconut shell carbon filter that help protect and prolong the lifespan of your RO.
This inline carbon pre-filter is compatible with RO-CTOP and RO-CTOP-C 2nd and 4th stages, RO-CTOP-PH/RO-CTOP-PHC 2nd stage, and RO-QUICK90 stage 2 & 4.
The APEC CT-1SED is a 1 stage sediment filter for RO-CTOP/RO-CTOP-C stage 1, RO-CTOP-PH/RO-CTOP-PHC stage 1, and RO-QUICK90 stage.
It is compatible with all 10-inch industry-standard sized water filter systems and features. 1/4 inch quick connect fittings for easy filter change-outs.
The 1st stage sediment filter helps remove dust, particles, and rust.
This is a 75 GPD Membrane Replacement Filter for Reverse Osmosis System.
The Express Water Countertop Reverse Osmosis Water Filtration System is a 4-stage system that fits most standard faucet types. The four stages include
1st stage: sediment filter, which helps filter dirt, dust, sand, and rust.
2nd stage: granular carbon filters It removes chlorine, volatile organic chemicals, and odor-causing compounds.
The 3rd stage is the Reverse Osmosis Membrane. Remove contaminants like lead, arsenic, chromium, fluoride, TDS, radium, and others.
4th stage: Post-Activated Carbon Filter. The final stage removes any possible taste or odor.
Sediment filters, granular carbon filters, and post-activated carbon filters are changed twice a year, while the membrane is replaced once a year.
It is certified by an independent laboratory to NSF standard 58 and operates at 45-80 PSI and 40-85°F.
The package includes 13/16” male thread, 13/16” female thread, and 15/16” female thread faucets for the most standard faucet. It also comes with a hygienic system faucet and tubing for setup up to about 3 feet from your faucet.
For every gallon of water produced, the system discharges between one and three gallons (depending on the pressure and quality of your incoming water).
Replacement filter for Express water Countertop Reverse Osmosis System
The set includes 3 inline filters designed to last for 6 months. These are sediment filters, granular activated carbon, and post-activated carbon.
Note no RO membrane
They help reduce contaminants such as chlorine, rust, total organic carbon (TOC), dirt, pharmaceuticals, silt, turbidity, dust, volatile organic chemicals (VOC), herbicides, industrial solvents, insecticides, pesticides, and other chemicals that cause bad tastes, odors, and more.
The filters are fully compatible with 1/4″ quick connect tubing and are certified by an independent laboratory to NSF standard 58.
The set includes six inline cartridges with a 100 GPD RO membrane. These are 2-post activated carbon, 2 granular activated carbon, 2 sediment filters, and 1 reverse osmosis membrane.
This set will guarantee pure water for 1 year.
The set includes three inline cartridges with a 100 GPD RO membrane. These include RO membrane, sediment filter, granular activated carbon, and post-activated carbon.
The OnliPure Purifier Reverse Osmosis Countertop is a 4-stage water filter. The stages include
Stage 1: Five Micron Sediment Filter that removes particles such as sand, sediment, and rust
Stage 2: Coconut-Based Activated Carbon Block Filter that removes VOCs, odor, chemical residues, and carcinogens such as THM’s and pesticides.
Stage 3: Reverse Osmosis Membrane. Provide 75 gallons of water per day
Stage 4: OnliPure Ion Exchange Post Filter. Polishing OnliPure Post Filter reduces any leftover contaminants after the Reverse Osmosis process to zero TDS.
Onli pure replacement filter
The buddle include
FIRST STAGE FILTRATION – 5-micron Prefilter removes Sediment, Rust, and other large particles.
SECOND STAGE FILTRATION – Carbon Block Filter removes Chlorine and other Disinfection by-products.
Fourth Stage: OnliPure Ion Exchange Post Filter. The Polishing OnliPure Post Filter reduces any leftover contaminants after the Reverse Osmosis process to zero TDS.
The AQUA TRU Countertop Water Filtration Purification System is NSF certified to remove 82 contaminants.
The system comes with a first filter that lasts from 6 months to 2 years.
The AQUA TRU reverse osmosis system is a 4-stage water purification process. The 4-stage includes:
Stage 1: mechanical pre-filter-this is a sediment pre-filter that removes sediment and cloudiness in the water.
Stage 2: reverse osmosis pre-filter. This is an activated carbon filter that removes chlorine and chloramines.
Stage 3: The US-made reverse osmosis membranes help remove toxic inorganic contaminants, including lead, chromium 6, arsenic, and nitrates.
Stage 4: Activated carbon filter. This activated carbon filter is a VOC filter. It helps remove toxic organic chemicals, including pesticides, drug residues, PFOA, and PFOS.
Its digital display will tell you when to change the filter.
This system features a removable tap water tank and a dispensing tank.
AQUA TRU Replacement filter and membrane.
The combo pack includes two prefilters and a carbon filter.
The 2-pre filter is a Stage 1 & 2 Pre-Filter for the AquaTru Countertop Water Filtration System.
The carbon filter is a Stage 4 activated Coconut Carbon Shell VOC.
This combo pack will last for 1 year.
This is a stage 3 reverse osmosis membrane.
The RO membrane will last two years or 1200 gallons.
This is a stage four activated carbon filter to remove volatile organic compounds.
It is replaced every year or after treating 600 gallons.
A two-year combo pack includes four pre-filters, two carbon filters, and one RO filter.
Pre-filters are stage 1 and 2 filters that reduce sand, silt, sediment, rust, and particles from water.
The carbon filter is stage 4 high-quality activated carbon.
The Ro filter is a stage 3 reverse membrane.
The AQUA TRU Countertop Reverse Osmosis Water Filter Purification System has two tanks: a tap water tank where you add untreated water from the tap and a clean water/dispensing tank where filtered water is stored ready for human consumption.
You can get an additional clean water/dispensing/purified water tank to carry your water in the office or store water in the fridge.
The tank is made of shatterproof and break-resistant BPA-free plastic. It also has a spill-resistant pour spout.
The SimPure Y5 is a stage 4 reverse osmosis water filtration system that has been tested against NSF standards. The stages include
Stage 1 and 2 composite filters include sediment filters that help remove sediment, sand, dirt, dust, and particles.
It also includes a carbon pre-filter to remove limescale, lead, chlorine, fluoride, taste, odor, and other radioactive substances.
Stage 3: a 0.0001 micron RO membrane that helps remove viruses, PFAS, bacteria, organic matter, and heavy metals.
Stage 4: Activated Carbon It includes activated carbon granules made from coconut shells.
It has four temperature settings with instant heat. This helps Enjoy pure water and various drinks in four temperature modes. The mode includes Room Temp, Milk Powder, Tea, and Coffee.
Simpure is 5 in 1 water purifier, that could be used as a drinking dispenser, water-heating kettle, under-sink filtration, filter pot, tea bar machine.
No installation is required. You just plug it in and you get purified water right away.
It comes with two removable tanks. There is a 5L removable water tank with a 1.5L internal pure water storage.
The system has a truly smart system. The smart system has a water quality indicator and a filter replacement alert that allows you to directly monitor the water quality and the lifespan of the filters.
The pure water to drained water ratio can reach 5:1 by using the recycling multi-filtration technology.
SimPure Y5 CF Filter Replacement Cartridge and membrane
These are stages 1 and 2 of the CF-composite filter.
It is commended to replace the Y5 CF Filter every 3-6 months to ensure the quality of the water.
This is STAGE 3-a 0.0001 micron RO membrane.
This is STAGE 4: Carbon Fiber Filter to effectively remove pesticides, pesticide residues, odors, organic matter in water, residual, chlorine, and other radioactive substances.
It is recommended to replace the Y5 CB Filter every 3-6 months to ensure the quality of the water.
- Filtration stage: 4-stage
- Filter duration: filters should be replaced after 12 months and the RO membrane after 2–4 years.
- Size: 14.5 x 9.5 x 16.2 inches
- Impurities removed: chlorine, TDS-total dissolved solids, fluoride, lead, chromium, arsenic, pharmaceuticals, pesticides, unpleasant taste and odor.
The ZIP countertop water filter purifies water in four stages.
- Stage 1-five micron sediment filter.
- Stage 2-activated carbon filter
- Stage 3-the Ro membrane
- Stage 4-alkaline post filter that returns beneficial minerals to the water, such as magnesium, calcium, and increases the water PH to an alkaline level.
All the above stages remove contaminants such as chlorine, TDS (total dissolved solids), fluoride, lead, chromium, arsenic, pharmaceuticals, pesticides, unpleasant taste, and odor.
It has an easy-to-change replacement filter available on Amazon (ZIP Countertop Water Filter Replacement Filters Bundle from Puricom), which will notify you of the filter change via a red-blinking light every 12 months. Note: filters are replaced after 12 months, and the RO membrane after 2–4 years.
To select the replacement filter for your system, see our post about the countertop water filter replacement cartridge.
More related articles on countertop water filters