Best Countertop Reverse Osmosis Systems of 2023
Countertop reverse osmosis systems are a popular and simple solution to get superb quality drinking water. Usually, there’s no installation needed, or it’s minimal. The maintenance is very low and Reverse Osmosis removes up to 99% of water contaminants.
Tabletop reverse osmosis systems are perfect for people renting a house or staying somewhere on a temporary basis. Also, businesses want to delight people with great quality drinking water (both cold and hot!). This allows you to have great and pure water without the need to install a regular RO system where you need to drill holes and set mounts.
Today we’re taking a look at the most popular options for countertop RO systems and looking for the right one for you.
| RO system | Amazon rating | Filter Stages | Capacity | Prices |
| APEC Water Systems RO-CTOP Portable Countertop RO System | 4.5 | 4 | 3 Gallons / 11.4 Liter per Hour | Check it on Amazon |
| SimPure Y5 Instant Heat RO System | 4.3 | 4 | 0.4 Gallon / 1.5 Litre tank | Check it on Amazon |
| Frizzlife RO Water Filtration System | 4.4 | 4 | 0.8 Gallon / 3 Liter tank | Will be updated |
| AQUA TRU Countertop Water Filtration Purification System | 4.4 | 4 | 1 Gallons / 3.8 Liter tank | Check it on Amazon |
| Express Water Countertop RO System | 4.4 | 4 | 3.5 Gallons / 13.2 Liter per Hour | Check it on Amazon |
| AlcaPure Zero Installation Purifier RO Countertop Water Filter | 4.2 | 4 | 75 Gallons / 284 Litres per day | Check it on Amazon |
| Home Master TMJRF2 Jr F2 Counter Top Water Filtration System | 4.3 | 3 | Instant on demand | Check it on Amazon |
| Countertop Portable Universal 5-stage RO Purification Water System | 4.2 | 5 | 75 Gallons / 284 Litre per day | Check it on Amazon |
Countertop RO system reviews
1. The best one: APEC Water Systems RO-CTOP Portable Countertop Reverse Osmosis Water Filter System
Amazon rating: 4.5

Why is it the best one? Because it’s simple, affordable, and does the job great. APEC Water Systems are well known for making excellent RO systems. With RO-CTOP, you’re getting the best functionality of the RO system that you can simply unpack and start using. Also, it’s easily portable because you can connect it to most standard faucets in a few minutes. The faucet adapter is designed in a way to let you switch between water flowing to the RO system or coming out of the tap as usual.
It has a large maximum output of 90 gallons per day. This is considered quite an amount in the context of countertop RO and water purification systems. As usual, the RO membrane produces some wastewater. Conveniently, this system has a drain pipe attached to the faucet adapter, so it won’t get displaced. As for wasted water. the ratio is 1:2 which is way lower than the accepted averages of other RO systems.
It’s made of BPA-free plastics. As for maintenance, APEC is known for its durable filter design. The filters on this model will last for a year which is twice as long as most other systems. And the RO membrane will be working for 3-5 years. That makes the filters and membranes a bit more expensive than average, but you save yourself maintenance time. So the average annual cost will be between $90 and $130.
PROs
• Tankless and easily portable with no installation needed
• Completely BPA Free materials
• Well-known and established USA manufacturer
CONs
• More expensive filters than direct competition
2. SimPure Y5 Instant Heat Reverse Osmosis Water Filtration System
Amazon rating: 4.3

It’s a modern gadget that brings the future to your home. Besides purifying water, this RO system also works as an electric hot water kettle on demand. What’s more, it can produce hot water in four different increments.
• Room temperature (the temperature of tap water)
• 113 F / 45 C (Warm milk)
• 185 F/ 85 C (Coffee)
• 198 F / 92 C (Tea)
So you’re actually saving space since you have two items (RO system and a kettle) in the same device.
This system has a 5 Liter (1.3 gallons) holding tank which makes it different from most of countertop RO systems. This gives you a water reserve, so the water is always there, ready to drink. Naturally, it can produce water at a faster rate than most on-demand RO systems, because it has a pump. You just need to keep up with topping up the tank. Beneath the control panel is a dispenser, with a removable drip tray. It has space even for most water bottles, so you can fill cups and containers with ease. The LED indicators that show the filter status and when they need to be changed. Filters themselves are easy to remove and replace with new ones.
PROs
• 5:1 water ratio You save up to 1500% water
• No installation no tools required
• Fast filter replacement