This replacement filter kit fits most standard undersink reverse osmosisRO water filter systems including the GE GXRM10RBL GXRV10ABL and PNRV12 APEC ROES50 PureDrop RTW5 RO5DX Spring RCC7 Watts Premier 4SV 5SV and more The carbon block filters reduce chlorine lead arsenic select VOCs and 13 other impurities The reverse osmosis membrane filter can remove a wide range of contaminants including dissolved solids Keep your drinking and cooking water greattasting Activated carbon block CTO filter made with 100 highquality coconut shell carbon the 50 GPD RO membrane produces 50 gallons filtered water per day For best filtration results the carbon filter cartridge should be replaced every six months and the RO membrane every 23 years depending on usage and local water quality ONDEMAND SUPPORT Assistance is available from our experts ready to answer any of your questions about your RO membrane Have a concern or question Americanbased customer support is available for the life of the product Welcome to the Membrane Solutions Family