EasyTwist is an undersink Reverse osmosis system optimized to treat tap water using the exiting water pressure. The easytwist-off disposable cartridges are designed to make replacement quick, easy and sanitary for customers who like to do the filter replacement themselves. Fit easily under a kitchen sink. RO filtration cleans water by taking out the totally dissolved solids (TDS) which contaminate the water. RO membrane removes an average of 95% of dissolved contaminants. RO works by using pressure to force the water solution through membrane, retaining the TDS on one side and allowing the pure water to pass to the other side.