Use and Care Manual

How to Replace Stage-3 Membrane (MEM-90)

Change every 2-3 years:

If Stage 1 & 2 pre-filters are changed regularly, the Stage-3 Membrane can last 2-3 years depending on

your input water’s quality. The Membrane needs replacing when: The TDS (total dissolved solids) level

in the pure water starts to increase (detected by a TDS meter), or when the water taste quality starts to

decline. Replace the Membrane as follows:

1. Locate the Membrane-Housing (with “Filmtec Membrane” label on it.)

2. Disconnect tubing from the Membrane-Housing Cap. Remove membrane-housing cap by turning it

counter-clockwise. Pull out the old membrane using pliers. Then insert the new membrane into the

housing. Make sure the end with “2 small black rings” goes in first as shown below (See Fig-

ure F).

3. Close the cap on membrane-housing. Reconnect tubing to the cap. Let RO run for 10-15

minutes to flush out the new membrane – discard the output water. When done flushing, the

pure water is ready for use.

Figure F

(Front View Of System)