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5 - REPLACEMENT OF THE PREFILTER,
POSTFILTER, AND RO MEMBRANE ELEMENTS
1. Turn off the water supply to the RO System.
2. Reduce system water pressure by opening the faucet.
CAUTION:
Even with the water supply turned off the membrane and prefilter sumps will contain a
considerable amount of water. By positioning the RO assembly in a sink or tub, most of the water
will be contained.
3. Disconnect locking bar and place the fittings (with tubing still connected) into a tub or bucket.
4. Move system into a contained area, such as a sink or tub.
5. Remove the support leg from the three sumps and unscrew the top sump as shown to access the prefilter
element. The support leg functions as a wrench to loosen the sump, Figure 13.
NOTE:
• There is no need to disconnect tubing from fittings on the
manifold. Remove locking bar and pull fittings out. Lubricate
O-rings with silicone prior to re-assembly.
• If changing only the prefilter and postfilter, the other sumps
do not need to be removed.
•
If changing the membrane elements, the prefilter and
postfilter should also be changed.
6. Remove exhausted prefilter and discard.
CAUTION:
The person handling the filters and membrane
elements must have clean hands to keep the
system sanitized. The use of sterile/latex gloves is
recommended.
7. If changing membrane elements:
a. Remove membrane sumps. Remove and discard used
elements.
b. Remove new elements from packaging.
CAUTION:
Elements contain a foodgrade preservative. The
use of sterile/latex gloves is highly recommended.
c. Lubricate element O-rings, brine seals, and sump O-rings
with silicone lubricant. Refer to chapter "Connection
Lubrication" for correct lubrication procedure of elements
cartridge.
d. Securely insert O-ring end of elements into manifold. See
Figure 13.
e. Replace sumps and tighten until it bottoms out.
NOTE: The system should be sanitized whenever a membrane
element or filter is replaced.
8. Sanitize the system.
a. The manifold should be positioned flat with the sump
connections facing up.
b. Pour a tablespoon (15 milliliters) of chlorine bleach into the
center opening of the prefilter sump connection. See Figure
14.
9. Install prefilter.
a. Remove new prefilter from packaging. Ensure gaskets are
secure. Insert prefilter into proper opening on manifold.
b. Lubricate sump O-ring with silicone lubricant.
c. With the prefilter element in place, screw the sump into the
connection. Tighten until it bottoms out.
All manuals and user guides at all-guides.com
15
13
14
Membrane Element
Locations
Prefilter Center Opening
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