APEC Portable Reverse Osmosis System [RO-CTOP-PH]

The RO-OCTOP-PH is without a doubt the best countertop RO system from APEC. It’s a combination of function and portability in one unit that will deliver pure alkaline mineral water.

If you are searching for a countertop system that’s ideal for homes with low pH, then this is an option you should check out.

The model comes in two versions, the RO-CTOP-PH and the RO-CTOP-PHC. The difference between the two is that the cartridges of RO-CTOP-PHC come with casing while the ones in the RO-CTOP-PH are exposed. Our review below is based on the RO-CTOP-PH.

Filtration Process

The RO-CTOP-PH is a 4-stage system featuring two prefilters, an RO membrane and an alkaline filter.

The 1st stage is made up of a polypropylene sediment filter which removes dirt, sand, rust and all larger impurities in the water down to 5 microns.

The 2nd stage is equipped with an efficient coconut shell carbon filter that captures chlorine, chloramines, VOCs and common chemicals that cause unpleasant taste and odor. It also helps to further trap smaller sediments and remove color and cloudiness. 

In the 3rd stage, we have the 0.0001-micron FILMTEC RO membrane where up to 99% of all TDS and remaining contaminants like fluoride, bacteria, viruses and heavy metals such as lead and arsenic are totally removed from the water. 

The 4th and last stage in the RO-CTOP-PH system is a food-grade calcite mineral cartridge. This filter adds calcium carbonate into the water which introduces calcium minerals that neutralize the acidity of the RO water and raise its pH level. The resulting water has a more balanced alkalinity and a much pleasant, natural taste.

Filtration Capacity

Despite being a compact, countertop RO system, this APEC RO-CTOP-PH model offers a high water output. It’s capable of generating 90 gallons of pure water per day making one of the best countertop RO systems for those with high water consumption.

Installation and Maintenance

Considering that it’s designed to stay on a countertop, the installation of the RO-CTOP-PH is a simple, straightforward process. The four filter cartridges come already assembled on a base. You only need to hook it to your faucet and you are done

The unit is compact measuring 14 x 6.5 x 6 inches. Therefore it won’t take up much space on your countertop and it weighs just around 10 pounds making it really portable. You can even carry it if you travel a lot and want to keep your water fresh and clean.

The only downside to this particular version is that the filter cartridges are exposed which may not look presentable. However, if you prefer the casing, you can go for the RO-CTOP-PHC which comes with casing.

It’s also worth noting that the unit is compatible with standard faucets only. It will not work with any off-size designer faucet, sprayer or pull-out taps.


  • Great water filtration performance
  • Alkaline filter helps raise the water pH level
  • Water tastes much better with added calcium minerals
  • Delivers up to 90 gallons of pure water a day
  • Lightweight and very portable
  • Installation is straightforward with little maintenance required
  • Two options to choose from


  • Compatible with only standard faucets
  • Does not feature a storage tank

Product Overview

ProductAPEC RO-CTOP-PH Portable Reverse Osmosis System
Rating4.5 out of 5 stars (4.5 / 5) (More than 61 reviews)
Recommended price248 USD (Check the latest price at Amazon.com)


Product Specifications

Pre-filters1st stage: Sediment filter
2nd stage: Premium extruded carbon block
RO membrane0.0001 micron Top Tier Filmtec RO Membrane
Post-filtersAdvanced coconut shell refining carbon
Incoming Water PressureN/A
TDS20 – 40 ppm
Storage tankTankless
Tubing 1/4 ” Color-code tub
FaucetNo faucet
Fitting & adaptorsQuick connect adapter fits all the standards faucets.
Waste Water to Filtered Water Ratio3:1
FeaturedPortable countertop
No installation required
Fits all the standard faucets
FDA Certified JG Food grade tubing
2 year extended manufacturer warranty with registration.
DocumentsUser Manual [PDF]
Warranty [HTML]


Satisfying Chart

(Estimation from the verified purchase customers)



Installation Guide

This video shows you step-to-step how to install the APEC Water RO-CTOP series Reverse Osmosis System.



Is this product NSF certified?

Yes, it is as you can see the NSF stamp on it.

Are the components BPA-free materials?

Yes, everything in this RO system is BPA Free.

Can I heat the filtered water from this RO system?

Yes, you can heat the filtered water that comes from this RO system.


Images Gallery

APEC Water RO-CTOP PH Reverse Osmosis System

APEC Water RO-CTOP PH Reverse Osmosis System
APEC Water RO-CTOP PH - Fittings
APEC Water RO-CTOP PH – Fittings
APEC Water RO-CTOP PH - 3 types of standard faucet
APEC Water RO-CTOP PH – 3 types of standard faucet
APEC Water RO-CTOP PH - How it looks
APEC Water RO-CTOP PH – How it looks
APEC Water RO-CTOP PH - Quick connect
APEC Water RO-CTOP PH – Quick connect
APEC Water RO-CTOP PH - Alkaline filter
APEC Water RO-CTOP PH – Alkaline filter
APEC Water RO-CTOP PH - Replacement
APEC Water RO-CTOP PH – Replacement

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