Even though both types of filters are considered in the class of “Ultra Filters” they are completely different. Reverse osmosis (RO) does a great job of removing some contaminants but there are some it does not remove. RO systems also remove beneficial minerals. There are two major problems with all RO systems.
First, all RO's waste a tremendous amount of water. It is estimated that for every one gallon of clean water produced for consumption at least 3 and up to 5 gallons of water will go down the drain. We all know how scarce potable water is becoming so knowing that you would be wasting water with an RO system is not a good idea in our thirsty world.
Second, all RO's lower the PH (Potential of Hydrogen) of the water to a level that is not really healthy for the human body. All drinking water should have a PH of 7.0 or higher. Any water with a PH lower then 7.0 forces the body to naturally compensate for the low PH of water and food.
Another problem is that RO systems produce water very slowly and most have a 2 gallon storage tank for immediate use. When the water storage tank is empty you have to wait many hours to get another gallon of clean water.
NanoCeram® filters will not change the PH of the water, they do not consume or waste scarce water down the drain and they produce a full flow of from 2 GPM to 50 GPM of clean safe water until the filter is full. That can be anywhere from 20,000 gallons to 250,000 gallons of water depending on the size of filter you have.