GE Merlin (4000569) 3.16" x 18.75" TFC Reverse Osmosis Membrane 350 GPD - Hydrologic Compatible

Replacement of RO Membrane Elements The functional life of the RO membrane elements will vary based on feed water quality. Product water should be tested periodically to verify the membrane elements are performing properly. For most residential applications, the RO membrane elements should be replaced every two to four years.

** Complete membrane replacement requires (2) membranes. **