Our well water is acidic and contains iron and iron bacteria. Before purchasing this unit, I installed a spin-down filter with a 74-micron stainless screen to remove suspended particles. I tried several whole-house filters in the next stage, but they would only last 30-45 days before the poor taste returned. I considered an expensive green sand system with carbon filters and chemical pumps, but the quote was in the thousands and the ongoing maintenance was expensive and not DIY. That is when I discovered the APEC Water solution.

I was able to connect the unit under my kitchen sink and plumb the output to the refrigerator water supply. The quality of the unit is outstanding. Everything is USA made, including the filters. I knew that I could trust the water quality, and I was right. We enjoy fresh, clean, polished, and PH-balanced drinking water and ice. This water makes the best coffee and tea. I just completed my 1-year filter change, and it was a trivial task.

Thank you, APEC Water! (Posted on 3/25/2018)

This is our 3rd purchase of a reverse osmosis system from APEC; we have installed them in all 3 of our homes over the past 25 years. I have to tell you this is the best reverse osmosis system on the market for our residential purpose/use. It is high out put and services our kitchen sink and automatic ice cube maker. The "taste" lives up to the advertising; it is simply the best! (Posted on 11/20/2017)

We purchased the ROPH-90 system a little over a year ago. Together with our plumber, we hooked the system up to (1) the faucet supplied with the system which was easily mounted next to the kitchen sink faucet (2) our refrigerator water/ice dispenser (3) our steam humidifier. I use PH strips and the TDS meter sold by APEC to monitor the water. Our water tastes phenomenally better than it ever has and for the first time ever, I did not have to clean ANY sediment of our steam humidifier coils (note - the humidifier is fed off of the 5th not 6th stage whereas the sink and fridge are fed off of the 6th stage). I just did the annual filter replacement of stages 1 - 3 and it was a BREEZE. The customer service provided by APEC has been A+ - I called to get questions answered when trying to choose a system, I called to get some clarification during the installation, and I called when ordering the replacement filters to get some questions answered. All calls were handled by extremely knowledgeable people who provided incredible customer service. Owning this system has truly been a pleasure. Thank you APEC!!! (Posted on 2/4/2017)

With my well water having lower pH and bad water, I had to find a good drinking system that can enhance pH along with removing the impurities. I chose this unit after spending few weeks after researching because of APEC great reputation and they are highly respected US manufacturer for over 18 years. After receiving this system, I am extremely impressed at the packaging and the system itself. Every part feels high grade and I just have not seeing a system this well built in a very long time. (Posted on 6/4/2016)

I bought and installed an inline TDS meter to the system. The water reading before going into the system is 250 ppm and 5 ppm before the last PH filter that adds calcium. I figure installing the TDS memter there is a better way to tell when to change the membrane. I also tested the meter before installing it by putting the sensor in a glass of the RO water and it read 3 ppm, so the PH filter must be removing something while adding calcium. All I know is the water tastes great. Best investment I've made in a long time. (Posted on 7/14/2015)

The water taste great and all filters are made in USA which we love. (Posted on 3/3/2015)

We purchased the system with the upgraded 14 gallon tank and installed it in our office kitchen. Everyone loves the taste of the water and it was able to support our demand without any issues. Now the coffee and tea taste like what they should taste like. (Posted on 2/18/2015)