APEC Portable Countertop Reverse Osmosis Water Filter SystemOverview of the APEC RO-CTOP-C Portable Countertop Reverse Osmosis Water Filter System

This best portable countertop RO system is ideal for those who need a reverse osmosis system to purify but don’t have enough undersink space for installing an under sink RO system. And if you just rent an apartment, you also can rely on this countertop water filter. Anyway, you can take it anywhere you like.

The APEC RO-CTOP-C Portable Countertop Reverse Osmosis Water Filter System features easy installation, and you just need to get this RO system up and running by attaching it to a standard tap faucet. That’s all. It is so effortless, isn’t it? Once you have connected it to the faucet, let this system sit on the counter and it will work for you and provide you with clean filtered water.

And this system also allows you to choose between tap water and filter water. The faucet adapter features a special design which allows you to do that. You can allow water to pass through the RO system and you also can allow water to directly pass through the water faucet, because sometimes you may not need filtered water. A waste water tube is also included. Therefore, waste water are led to flow down the sink drain.

As a portable water filter, the dimension of this system is 16 inches x 6.5 inches x 6.5 inches and the weight is only 7 lbs. Even if it is compact, you can use it to get up to 90 gallons of filtered water per day and it is a 4-stage reverse osmosis system. And you also don’t need to worry about the output water flow. Compared to other RO systems, it also performs well. The output may be influenced by the temperature and pressure of the source water.

Besides its large output, it is also very efficient and leads less waste water. It only produces 2 gallons of waste water while producing 1 gallon filtered water. Other RO systems may produce up to 3 gallons of waste water by offering 1 gallon of filtered water. Therefore, this filter is helpful to save some water and money for you.

As it is only a countertop RO system, it doesn’t come with a storage tank that is used to hold filtered water. This means when you use it to get pure water, and it will produce filtered water but not offer you filtered water from a storage tank. Sometimes, if the source water temperature or pressure is low, you may need to wait for some time to allow it to fill your container with fresh filtered water. If the pressure is not a problem, you can get clean water very soon.

Although as a portable RO system, it has its limitations. Due to its lightweight feature and small size, it is perfect for RVs, hotel rooms, apartments and other places where a large under sink water filter cannot be installed.

Filtration System Design

This APEC RO system features a compact design but comes with all filters. Its RO membrane is clipped to a back plate and enclosed in a case. It uses a single hose to dispense filtered water. And a double hose is used to attach to the water faucet for feed water and waste water.

The stage 1 and 2 water filters are self-contained. It is recommended to replace them every 6 months. However, how long the stage 1 and 2 water filters can last depends on the quality of the source water. And the replacement is also pretty easy. Push fit connectors, and remove their hoses, and remove the old filers, and clip in the new replacement filters. At last, reattach their hoses. That’s all.

The core stage is the 4 stage. Generally, it is recommended to replace its filters every 2 to 5 years, depending on how you use it to purify water. And the replacement process is similar to the stage 1 and 2 filters. The only difference is that you need to remove its lock clip at the first.

The RO membrane should be replaced every 2 to 5 years. And the replacement process is not difficult but you need to pay attention on something and don’t it carefully. Before removing the membrane house cap, you need to remove its tubing first. And then, you need to use a pair of pliers to pull out its old membrane. And then just insert the new RO membrane. This step is very important. You need to make sure the end with 2 black O rings is inserted first. At last, you just replace its end cap and the tubing. After the installation, it is recommended to run water through it for about 15 minutes and this can help to flush and clean the membrane. After that, you can use it to get pure water to drink.

Water Efficiency

To our surprise, this RO system doesn’t waste water. It only produces 2 gallons of waste water by providing 1 gallon of fresh clean water, while other large under-sink reverse osmosis system may produce up to 3 gallons of waste water by offering 1 gallon of filtered water.

Ease of Installation

The installation is also very easy. If you are the first time to install a water filter, you can get a full copy of the installation manual on its official website, just click here to learn more. here

And you also can install it with ease. This system uses an aerator to allow you to install it onto a faucet. The whole process only takes you about several minutes. It comes with a lot of adapters which are compatible with most faucets. First, you need to unscrew the aerator by hand. If you find it is not so easy, you may need a plier to help you loosen it. Once you have removed the aerator, just screw in an adapter, and then attach its connect valve to your faucet.

And then turn your faucet and open its feed valve to allow water to run through. Later, filtered water will flow out of its outlet pip. After installation, you need to turn on it and let water run through for about 15 minutes. This can flush the whole system, making the filtered water much cleaner.

The water temperature and pressure can influence its output. If the water is very cold first, you can use a little hot water and add to it to make it warmer. And then, the output will be increased.

Advantages & Disadvantages:


  • Portability – This system is easy to install and very portable.
  • Higher Output – This system is able to produce up to 90 gallons of filtered water per day.
  • Produces less waste water – 1 gallon of filtered water only lead 2 gallons of waste water, lower than other systems
  • Lightweight – only weighs 7 lbs.
  • Effective to remove up to 99% of pollutants and contaminants in our water
  • Comes with a 1-year limited warranty
  • Local technical customer support that is free for the whole lifetime of this system.
  • Manufactured in the USA, not imported from other countries


  • Doesn’t comes with a storage tank to hold water
  • The system may need some time to fill a large container, even if the water pressure is enough.
  • Only work with mainstream standard faucet types
  • Filters are not so easy to be changed.
  • May take up some countertop space

The Bottom Line

As a countertop water filter, we cannot expect it performs as an advanced under-sink RO system. However, also because of its compact design and portability, it is perfect for those who just don’t have undersink space to install an under sink water filter. Therefore, if you are a student, travelers, or just live in a rented apartment, this countertop RO system is the perfect choice. Compared to other types of countertop water filters, this RO system ensures the high quality of filtered water.

In a word, this one is the best countertop water filter you can trust.

APEC Portable Countertop Reverse Osmosis Water Filter System (RO-CTOP-C) Reviews

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