Pollutants that a 0.5 micron water filter can remove: 1. Microorganisms 2. Suspended particles 3. Organic matter 4. Sediment and colloids 5. Algae and microplankton

Because it needs to pass through a semi-permeable membrane to remove dissolved solids and microorganisms in the water, the RO system has a higher water pressure requirement. A RO system requires a water pressure of 40-80 psi to operate normally, and the optimal operating pressure is around 60 psi.