SimPure Y7/Y7P Series CF Filter Replacement Cartridge for SimPure Y7, Y7P-W, Y7P-BW, 6 Months Replacement Cartridge (1 Pack)ONLY Compatible Replacement Filters for SimPure Y7 Y7P Series (Y7, Y7P W, Y7P BW) Countertop RO water Filter System It is commended to replace the SimPure CF Filter Every 6 months to ensure the quality of the water. (Due to the difference in feed water quality, the above is estimate) And the CF Smart Indicator Light will light up to remind you replace the filters QUICK CHANGE & TOOL FREE: The twist in filter system makes the filter replacement a