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SpectraPure
PROCEDURE FOR MEASURING WASTE TO PRODUCT WATER RATIO
This procedure will assure you of maximum life and reliability of your SpectraPure System. Failure to perform this proce-
dure can permanently damage the membrane and will void the pro-rated Membrane Warranty.
In order to maximize the life of your SpectraPure RO Membrane, you may need to adjust the ratio of the concentrate to
purified water. If not enough concentrate is allowed to flow past the membrane during operation, the impurities will
precipitate out on the membrane surface, clogging the RO Membrane. To keep this from happening, the Concentrate to
Purified Water Ratio must be checked and adjusted in order to compensate for pressure and temperature variations that
exist in all water supplies. The flow rate of the concentrate must be a minimum of 4X the product flow rate. 4X to 6X is an
acceptable concentrate flow rate.
Procedure:
1. Turn off the feed supply valve.
2. Turn the right-angle ball valve on the top of the pressure tank to the off position.
3. Disconnect the blue line from the tank.
4. Disconnect the black line from the drain saddle. (See figure 9)
5. Open the cold water supply valve and let the system run for 15 minutes. Direct both tubes down the
drain.
6. Collect product water from the blue tubing into a measuring cup for one minutes. Measure the collected amount
in milli-liters. Do the same with the waste from the yellow line.
(Although not needed in this proceedure, the daily product flow rate in Gallons per Day (GPD) can be calculated to be
7. If ratio is less than 4:1
Disconnect yellow drain line from the membrane housing and then remove flow restrictor. Use
Waste to Product ratio chart in your system's installation guide to determine where to cut the flow
restrictor in order to obtain a 4:1 ratio. (FR-90 Chart)
8. If ratio is greater than 6:1, flow restrictor requires replacement (Please contact SpectraPure Inc).
9. Turn the right-angled ball valve on the top of the pressure tank to the ON position.
10. Reconnect the 1/4" yellow drain line to the drain saddle. Turn on feed supply.
11. This completes the procedure.
15
®
PROCEDURE FOR WASTE TO PRODUCT RATIO
WASTE (YELLOW) IN MILILITERS______________
PRODUCT (BLUE) IN MILILITERS______________
The resultant is the Concentrate to Product Ratio
equal to the product flow rate times 0.38 ).
FR-90
PRODUCT RATE
ml./min.
269
233
213
198
183
175
164
154
148
141
136
133
129
128
124
124
SpectraPure®Inc.
480.894.5437 Call us toll-free 1.800.685.2783
2167 East Fifth St, Tempe, Arizona 85281
DIVIDED BY
(Yellow)
CUT TO LENGTH
gpd
in.
cm.
102
1
2.5
88
2
5.1
81
3
7.6
75
4
10.2
69
5
12.7
67
6
15.2
62
7
17.8
58
8
20.3
56
9
22.9
54
10
25.4
52
11
27.9
50
12
30.5
49
13
33.0
48
14
35.6
47
15
38.1
47
16
40.6
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