Change the Membrane Every Two to Four Years
The life of a reverse osmosis (RO) membrane varies by manufacturer and use. Reverse osmosis membranes last from two to three years, according to Pure North Water. Free Drinking Water claims that RO membranes last from four to seven years.
Change Pre-Filters Yearly
Changing pre-filters each year will extend the life of your RO membrane. The pre-filters of a RO filtration system prevent chlorine and sediment from clogging your RO membrane, according to Pure North Water.
Check with the manufacturer to determine the expected life of your RO membrane. Most RO membranes last from two to four years. Change pre-filters yearly to extend the life of your RO membrane.