This Rainsoft Reverse Osmosis membrane is a popular and compatible 50 GPD for replacement TFC-RS9-50.
Top performing compatible Rainsoft Ultrefiner RO membrane, 50 gallons per day. To be used in systems 9757, 21191, 9598, 21179, 21176, UF50, UF50T, UF50TCB, UF50T-CBVOC, and UF50N-CBVOC.
We have high quality filters, and these should be changed every three years. Outstanding value for your drinking water system.