Osmio EZFITPRO-200 Undersink Water Filter Kit 15mm Push FitLike the 100, this model fits onto an existing cold supply to make the cold tap all filtered. It has the chlorine and additional limescale and heavy metal filter. The filters are changed usually every 6 months. Osmio EZFITPRO 200 Undersink Water Filter Kit 15mm Push Fit The Osmio EZFITPRO 200 Chlorine, Limescale & Lead Water Filter System is an ideal water filter system for installing under the kitchen sink. The system has no need for a separate tap