How Often Should I Change the Membrane on My Reverse Osmosis Unit?

The life of a reverse osmosis (RO) membrane varies by manufacturer and use.

Change the Membrane Every Two to Four Years

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.

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.

Bottom Line

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.

About the Author

Rebekah Richards is a professional writer with work published in the "Atlanta Journal-Constitution," "Brandeis University Law Journal" and online at tolerance.org. She graduated magna cum laude from Brandeis University with bachelor's degrees in creative writing, English/American literature and international studies. Richards earned a master's degree at Carnegie Mellon University.