More Filtration, Better Quality Water, but still same capacity than the PC4. 

The PC5 Reverse Osmosis Water Filter is capable of producing 50 gallons of pure water a day with a 4 gallons tank capacity holding tank.  This large capacity reverse osmosis system together with its large holding tank will produce enough pure water not only to drink, but to wash your vegetables, fruits and all natural food, its long reach faucet is installed on your kitchen sink makes this task even easier and safer. The PC5 Reverse Osmosis System can produce pure water for  your ice maker. All you have to do is run a water line from the system to your refrigerator. Because Coffee and Tea are 99% water, they are no better than the water which they are made. Imaging better tasting coffee, tea and ice cubes so clear that you can almost see through.  

The reverse osmosis processes water at the molecular level. By squeezing ordinary tap water against a special membrane, pure water molecules are separated from impurities. These impurities are automatically rinsed down the drain leaving only clean great tasting water. The PC5 is ideal for low sodium diets. It removes over 90% of sodium salt from tap water.