Stage 4 Ro Membrane: Replace Every 2 - 3 Years Or Sooner If Tds Level Starts Increasing; How To Change Reverse Osmosis Membrane; Stage 5 T33 Fine Carbon: Replace Every 12 Months; How To Change Inline Cartridges In 5 Th - 7 Th Stages - Ispring RCS5T Installation Instructions & Operating Manual

2. If there is enough room under the sink and filter system is hung on the wall, it could be
easier to twist the filter housing off without taking the unit off the wall. Otherwise, it could
be easier to pull the system out, lay it down and work towards the housing bottom. Please
be careful with tubing connections when pulling the system out.
3. Twist off the filter housing in a counter-clockwise direction when looking from the bottom.
Use a housing wrench (the bigger one) if necessary.
Refer to Installation Step 4.1 to install a new vertical filter cartridges and twist the housings
4.
back on. Remember not to over tighten or it will be hard to open next time.
Stage 4 RO Membrane: Replace every 2 – 3 years or sooner if TDS level starts
increasing.
Check the TDS level at least once a month to monitor the system performance. The rejection rate
should be above 90% (NSF/ANSI STANDARD 58 for RO water filter).

How to Change Reverse Osmosis Membrane

1. Reverse osmosis membrane usually last about 2 – 3 years, depending on the source water
quality, clean water usage and the replacement frequency of the three pre-filters.
2. To ensure system performance and water purity, filter cartridges must be replaced on
schedule. Use the TDS meter periodically to check rejection rate.
3. Shut off the water supply valve and (optional) tank valve, open the faucet to depressurize
4. Place a bucket or towel under the unit to catch water spills.
5. Remove the tubing from the inlet fitting on the membrane housing cap. Use a housing
wrench or by hand to twist off the housing cap in a counter-clockwise direction when
looking from inlet. Pull out the old membrane. Use scissors or pliers to apply leverage if
necessary.
6. Clean the housing using hot water and optional scent-free dish soap. Rinse thoroughly. Cut
open the small end of the sealed bag of a new RO membrane, hold the new membrane with
the bag, and insert it into housing without touching the membane with your bare hands,
which may contaminate it.
Check the O-ring on the open end of the membrane housing. It is recommended to replace it
7.
every 3 years to prevent leaks. Twist the membrane housing cap back on by hand. Use a
wrench for a final 1/4 turn if necessary. DO NOT over tighten.

Stage 5 T33 Fine Carbon: Replace every 12 months

Unscrew the elbow fittings on both ends, put them on the new cartridge, and use new Teflon if
necessary.
How to Change Inline Cartridges in 5
1. Please note that the 5
different kind of fitting.
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– 7
th
th th
- 7 stages (model specific) have directions and each end may have a
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