Reverse Osmosis System - When to Change the Membrane

Typically, the prefilter and postfilter in a reverse osmosis system is changed every six months. The reverse osmosis cartridge usually last for 3 to 5 years.

Replacing the Membrane in a Reverse Osmosis System

When the TDS (total dissolved solids) reduction of the system falls below 75%, it is time to replace the reverse osmosis cartridge/membrane in addition to the prefilter and postfilter. The TDS should be checked annually. Replace the membrane if the TDS falls below 75% reduction or a maximum every 3 to 5 years, as needed.

A water test kit can be obtained from an independent laboratory to check the TDS reduction. For information on the water test kit, please consult the Owner' Manual for the specific model you own.

Note: We do not recommend another manufacturer’s membrane or filters.

Additional Support

Should you have additional questions regarding your reverse osmosis system, you can reach out to our Innovations Team directly at 1-800-952-5039 (option 1) from 8:00 AM to 6:00 PM, EST, Monday through Friday.