123Filter iSpring Installatie-instructie - Pagina 14
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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/ASIN 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 and the replacement schedule 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 water purity
3. Shut off the water supply valve and 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 looking from inlet.
6. Pull out the old membrane. Use scissors or pliers to apply leverage if necessary.
7. 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 hand, which may
contaminate it.
Check the O-ring on the open end of the membrane housing. It is recommended to replace it
8.
every 3 years to prevent leaks.
Twist the membrane housing cap back on by hand. Use a wrench for a final ¼ turn if necessary.
9.
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 5th – 7th stages
1. Please note that the 5th - 7th stages (model specific) have directions and each end may have a
different kind of fitting.
2. Disconnect the tubing from the Quick-Connect fitting, unscrew the fitting, unwrap a new
cartridge, replace the Teflon tape on
label to screw the correct fitting on each end, and reconnect the tubing.
O-rings: Replace every 3 years or sooner if leak happens at O-ring.
The package comes with 3 spare O-rings for the pre-filter housing, and 1 spare O-ring for the membrane housing.
Please save them with this manual.
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Figure 11
fitting threads if necessary, follow the
the
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Figure 12
sign on the
Page 13