Why Does Kent Ro Needs Regular Kent RO Service? To avail purified water for all time, it is very important to change the filter cartage like Sediment Spun , Sediment Inline, Carbon Inline, Activated Carbon, Uf Membrane, Kent Ro Membrane on a regular twelve month basis. This is to ensure that the functionality of the Kent Ro System is to the most advantageous level. Additionally, periodic Kent RO Servicing on a regular interval of four months is must. Costly parts of the Kent Ro Purifier are likely to get damaged and quality of pure water became tasteless if periodic servicing is avoided.