How often do I need to change my Reverse Osmosis Filters?
Q: How often do I need to change my Reverse Osmosis Filters?
A: We recommend that you change 3 out of 4 filters once a year. Once every 5-7 years we recommend that you change the membrane of the system. There is a membrane monitor on Guthrie & Frey Water Conditionings Reverse Osmosis Systems.