WD-KJF Filter for Waterdrop K6 Reverse Osmosis Instant Hot Water Dispenser SystemProduct Model WD KJF Adaptive Model WD KJ 600 & WD K6 W Filter Service Life 12 months Package Dimensions 16. 7 x 6. 3 x 6. 3 inches Item Weight 6. 17 pounds How often should I replace the filter? Replace the filter every 12 months . This may vary based on your water quality conditions. What contaminants can the filter reduce? The filter can effectively reduce TDS, heavy metals, fluoride, organic matter, etc. How to replace the filter? It is very easy