SpectraPure
®
SpectraPure
®
Inc.
480.894.5437 Call us toll-free 1.800.685.2783
2167 East Fifth St, Tempe, Arizona 85281
12
REVERSE OSMOSIS MEMBRANE PERFORMANCE TESTING:
The actual performance of the membrane in the MC-RODI-400UHE-20 is primarily dependent on Tap Water Temperature.
In order to characterize a membrane, there must be common testing data. For testing the UHE-400 membrane, the
specification is 77° F water temperature. Warmer water will result in an increase in production and colder water will
result in a decrease in production. Most locations will not have exactly 77° F water. Use the calculation below to determine
what the membrane will produce with your water conditions. Look up the water temperature on the chart below to
determine the Temperature Correction Factor (TCF).
Temperature Correction Factor Table (TCF)
°F /°C
TCF
°F /°C
TCF
°F /°C
TCF
41.0 /5
0.521
59.0 /15
0.730
77.0 /25
1.000
42.8 /6
0.540
60.8 /16
0.754
78.8 /26
1.031
44.6 /7
0.560
62.6 /17
0.779
80.6 /27
1.063
46.4 /8
0.578
64.4 /18
0.804
82.4 /28
1.094
48.2 /9
0.598
66.2 /19
0.830
84.2 /29
1.127
50.0 /10
0.620
68.0 /20
0.857
86.0 /30
1.161
51.8 /11
0.640
69.8 /21
0.884
87.8 /31
1.196
53.6 /12
0.661
71.6 /22
0.912
89.6 /32
1.232
55.4 /13
0.684
73.4 /23
0.941
91.4 /33
1.267
57.2/14
0.707
75.2 /24
0.970
93.2 /34
1.304
TEMPERATURE COMPENSATION
400
x
T.C.F. =
Actual
Production
Rate
Nominal
Production
Rate
REVERSE OSMOSIS MEMBRANE REPLACEMENT:
1. Turn off the water supply to the RO system and unplug the power cord. Place the system where the membrane
housing is easily accessible.
2. Loosen the single brass compression nut and remove the black tubing from the membrane housing feed
water fitting. This is the “input” end.
3. Loosen the brass compression nut and remove the black tubing from the opposite end of the membrane
housing.
4. Remove the blue tube from the center-located push fitting on the same end.
5. Use two flat head screwdrivers to weparate and release the “tooth-like” clips on each end of the membrane
housing. Remove the housing from the two clips.
6. The membrane housing may now be relocated to a sink or other waterproof area.
7. Remove the two bolts that hold the yoke clamp together on the end of the housing with one fitting. This is
the “input” end.
8. Pull or pry the black cap from the steel housing. Pull the membrane out of the housing. Note the orientation
of the membrane. The brine seal is on the end to first come out.
9. Wash the empty housing with soapy water. Rinse thoroughly with hot, clean water.
10. Put a small amount of silicone lubricant on both ends of the protruding product tube.
11. Insert the new membrane into the housing with the brine seal end the last to go in. Firmly push the membrane
into the housing until it bottoms out.
12. Carefully press the black cap back onto the base.
13. Reinstall the yoke clamp and tighten both bolts.
(continued on page 14)
