SpectraPure CSPDI-90-MF User manual

v6 2015-08-24
INSTALLATION AND OPERATING MANUAL
WARNING
Please read carefully before proceeding with installation. Failure to
follow any attached instructions or operating parameters may lead
to the product’s failure and possible damage to property.
CSPDI-MF (manual flush)
CSPDI-AF (automatic flush)
(90 & 180 GPD models)
Reverse Osmosis/Deionization
Water Purification Systems

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®
Inc. 480.894.5437 Call us toll-free 1.800.685.2783
2167 East Fifth St, Tempe, Arizona 85281
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TABLE OF CONTENTS:
System Features ...................................................................................................... 3
System Specifications ............................................................................................ 4
General System Description ................................................................................. 5
Front View of CSPDI-RODI-90 System ................................................................6
Front View of CSPDI-RODI-180 System .............................................................. 7
Typical Rear Views for -MF Systems .................................................................... 8
Typical Rear View for -AF Systems ...................................................................... 9
Working With Push Fittings .............................................................................. 10
System Installation & Initialization .............................................................11-12
Install the Float Valve ..........................................................................................12
Float Valve Illustration ........................................................................................13
Flow Restrictors and Test Strips ........................................................................ 13
How It Works ........................................................................................................14
The Manual Flush Valve (-MF Versions) ...........................................................14
The Auto Flush Valve (-AF Versions) ................................................................15
Booster Pump Installation .................................................................................. 15
Sediment Prefilter Replacement ........................................................................16
Carbon Block Filter Replacement ......................................................................17
DI Cartridge Replacement .................................................................................. 18
RO Membrane Replacement ............................................................................. 19
RO Membrane Diagnostics ................................................................................ 20
Testing the Quality of the Membrane ............................................................. 20
Membrane Production Calculation ............................................................ 21-22
Tips for Long Membrane Life ............................................................................ 22
Troubleshooting Guide ...................................................................................... 23
Terms and Conditions ........................................................................................ 24
Three Year Limited Warranty ............................................................................ 25
Optional Accessories .......................................................................................... 26
Notes ...................................................................................................................... 27
Replacement Parts .............................................................................................. 28
COPYRIGHT 2002-2015© BY SPECTRAPURE INC
ALL RIGHTS RESERVED
No part of this publication may be reproduced, stored in a retrieval
system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording or otherwise without the prior written permission
of SpectraPure Inc.

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This CSPDI RO/DI System comes complete with:
• SpectraSelectPlus™ 99% rejection TFC membrane
(2 membranes in 180GPD system)
• 2:1 waste-to-product ratio produces 50% less waste water
(3:1 for hard water areas)
• Long-life high-efficiency 0.5 micron Sediment prefilter
• High-capacity 0.5 micron Carbon Block prefilter eliminates chlorine,
herbicides and other organic pollutants
• SilicaBuster™ Extended Life Super DI Cartridge (DI-SB-10HC)
• Three-probe TDS Meter to monitor tap water, membrane and DI
performance.
• Automatic or Manual Flush Valve for longer membrane life
• Automatic ShutOff Valve saves water
• Inline feedwater Ball Valve for manual system shutoff
• Float Valve included for overflow protection
• Tri-color custom pressure gauge indicates when to change prefilters
• Durable, no rust mounting bracket and clear filter housings
• 6-foot feed, product and waste tubing included
• Housing wrench for easy filter removal
• Garden hose adapter for feed water hookup
• 3-year warranty
Thank You for your purchase of a SpectraPure®System. With proper installation
and maintenance, this system will provide you with high quality water for
years to come. All SpectraPure®products are rigorously tested by us for
safety and reliability. However, SpectraPure®Inc. Assumes No Responsibility
for water damage due to leaks. It is the user’s responsibility to determine that
the system is leak-free. If you have any questions or concerns, please contact
our customer service department at 1.800.685.2783.
Warning: SpectraPure does not recommend
drinking deionized water.

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Inc. 480.894.5437 Call us toll-free 1.800.685.2783
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SYSTEM SPECIFICATIONS:
Sediment Prefilter 0.5 micron MicroTec™ sediment prefilter (SF-MT- 0.5 -10)
Carbon Filter 0.5 micron carbon block prefilter (CF-0.5-10)
RO Membrane Type SpectraSelectPlus 99% rejection membrane (TFC)
DI Cartridge SilicaBuster™ SUPER DI™ Cartridge (DI-SB-10HC)
Rejection Rate Minimum 98%; 99% typical
Input Water Pressure 60 psi (4.15 bar) line pressure*
Input Water Temp 77°F (25°C)
Recovery Rate 33% (i.e. 33% of the water will be collected as pure water)
Dimensions:
CSPDI-180-AF (-MF) 15" W x 18" H x 7" D (Two Membranes)
CSPDI-90-AF (-MF) 15" W x 16" H x 7" D (One Membrane)
Nominal Membrane Flow Rates @ 60 psi, 77° F, & 250 ppm TDS :
GPD Product Water Flow Rate Concentrate Flow Rate (2:1)
90 468 ml/min 468 ml/min
180 468 ml/min 936 ml/min
Permeate flow and TDS rejection is based on the following test conditions:
250 ppm tap water, 77° F (25° C), 33% recovery and 60 psi.
Higher TDS, harder tap water, higher temperature, greater recovery rate, or
lower operating pressure may contribute to reduced permeate flow and/or
lower TDS rejection.
Reverse Osmosis Operating Limits:
Operating Pressure* 40 – 80 psi (2.75 – 5.5 bar)
pH Range 2 – 10
Maximum Temperature 113° F (45° C)
Maximum Turbidity 1.0 NTU
Maximum Silt Density Index 5.0 (based on 15 min. test time)
Free Chlorine Tolerance less than 0.1 ppm
Maximum Iron less than 0.1 ppm
Maximum Manganese less than 0.1 ppm
Maximum Hydrogen Sulfide 0 ppm
*Operating pressure less than 40 psi may require a booster pump:
Operating pressure greater than 80 psi may require a pressure regulator.

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GENERAL SYSTEM DESCRIPTION:
This SpectraPure®RODI System gives you a continuous supply of sparkling
clear water. The reliability with the SpectraPure®Water Treatment System is
greatly improved over other systems. Costly maintenance can be avoided,
providing high quality water at your fingertips.
The incoming feed water from a cold water source is directed through
BLACK tubing with an inline ball valve and is first passed through a
sediment prefilter. This filter is used to remove excessive turbidity, sand,
dust, silt, etc., that would otherwise cause the carbon filter to plug up.
The next stage of filtration is the carbon block prefilter. This filter is used to
remove organics and chlorine from the feed water that can damage the
membrane. The next stage of the system is the RO membrane.
Household water pressure is used to force tap water through the
semipermeable RO membrane. The membrane only allows the purest of
water molecules to pass through it while over 98% of most inorganic salts,
all microorganisms and almost all high molecular weight organics in the
water
are rejected by the membrane and sent down the drain.
This RODI system has a one stage Deionization cartridge that polishes the
RO water to less-than-one ppm purity. This is
our SilicaBuster™ Extended
Life Super DI cartridge.
The CSPDI RODI system comes equipped with a three-probe Inline TDS
meter. The TDS meter can monitor three steps in the purification process.
Line 1 of the meter shows the tap water TDS. Line 2 of the meter shows
the TDS of the RO water. Line 3 of the meter shows the TDS of the final
product water (out of the SilcaBuster DI).
A pressure-operated Shutoff Valve and a Float Valve are provided for
convenient filling of a storage reservoir.
A Manual Flush Valve (-MF) can be used to periodically rinse the
accumulated impurities and concentrated waste water from the surface of
the RO membrane to help increase the life of the membrane.
An Automatic Flush System (-AF) can be used to periodically rinse the
accumulated impurities and concentrated waste water from the surface of
the RO membrane to help increase the life of the membrane.

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SINGLE MEMBRANE RO/DI SYSTEM
CSPDI - 90 GPD:
YELLOW 1/4"
Waste Water
Tubing
Attaches
Here
SpectraSelectPlus RO Membrane
(inside Housing)
Pressure
Gauge
0.5 micron
Sediment Prefilter
(SF-0.5-10)
High-Capacity
SilcaBuster
(DI-SB-10HC)
BLACK
1/4"
Tap Water
Tubing
Attaches
Here
BE SURE TO CONNECT BLACK TUBING AND
ELBOW TO END OF MEMBRANE HOUSING
Three-Probe TDS Meter
Line 1 = Tap Water
Line 2 = RO Water
Line 3 = DI Water
0.5 micron
Carbon Block Filter
(CF-0.5 -10)
BLUE
1/4"
DI Water
Tubing
Attaches
Here
Manual Flush Mechanism
Flow Restrictor in this end
of Red (or Green) tubing

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DUAL MEMBRANE RO/DI SYSTEM
CSPDI - 180:
0.5 micron
Sediment Prefilter
(SF-0.5-10)
High-Capacity
SilcaBuster
(DI-SB-10HC)
0.5 micron
Carbon Block Filter
(CF-0.5 -10)
Pressure
Gauge
BLACK
1/4"
Tap Water
Tubing
Attaches
Here
2 SpectraSelectPlus
Membranes
(inside Housings)
BE SURE TO CONNECT BLACK TUBING AND
ELBOW TO END OF MEMBRANE HOUSING
BLUE
1/4"
DI Water
Tubing
Attaches
Here
YELLOW
1/4"
Waste Water
Tubing
Attaches
Here
Three-Probe TDS Meter
Line 1 = Tap Water
Line 2 = RO Water
Line 3 = DI Water
Automatic Flush Mechanism
Flow Restrictor in this end
of Red (or Green) tubing

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REAR VIEWS for - MF SYSTEMS:
DUAL MEMBRANE SYSTEM
Waste
Water
Port
Product
Water
Port
Filtered
Input
Water
Port
Flow Restrictor
in Red (or Green)
Tubing
Flush Valve
(Closed Position)
Open to Flush
Filtered
Input
Water
Port Product
Water
Port
Waste
Water
Port
Cold
Water
Input
Port
Auto ShutOff Valve
(ASO)
Connect
Yellow
Drain Tubing
Here
Product
Water
in Blue
Tubing
This End has
Small “Plug”
SINGLE MEMBRANE SYSTEM
Waste
Water
Port
Product
Water
Port
Flush Valve
(Closed Position)
Open to Flush
Auto Shut-Off Valve
(ASO)
Filtered
Input
Water
Port
Product Water
in Blue Tubing
Waste
Water
to
Yellow
Drain
Tubing
Flow Restrictor in
Red (or Green)Tubing
This End has
Small “Plug”
NOTE: If Flush Valve is OPEN, product water cannot be produced.

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Pressure
Switch
Connector for optional Booster Pump (Black-Black)
Connector for Pressure Switch
Wiring Harness (Red-White-Black)
Connector for Solenoid
(Red-Black)
Control Module (AFC-01)
Flow Restrictor (3:1) in Red Tubing (Green Tubing for 2:1 Flow Restrictor)
Solenoid Valve Automatic
ShutOff Valve (ASO)
Waste
Water
to
Yellow
Drain
Tubing
Connect 2.1 mm Mini Plug to Power Supply. If using Booster Pump, you must use a 24VDC, 2.5A Power Supply here.
Automatic Flush Components (-AF models) - Shown with membrane removed for clarity

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WORKING WITH PUSH FITTINGS:
Push fittings are very reliable and convenient tubing connectors.
To remove the tubing from its push fitting:
1. Firmly depress and hold the push fitting collar down with your thumbnail.
2. While the push fitting collar is depressed, pull the tubing straight out
of the push fitting. Once the tubing is removed, release the collar.
To reinsert the tubing into its push fitting:
1. Moisten the O-ring seal inside the push fitting by dripping a few drops
of clean water into the fitting.
2. Grasp the tubing near the end, and insert the tubing into the push
fitting.
3. Push the tubing into the fitting until resistance is felt, approximately
1/2 inch (12.7 mm). The tubing is now resting on the O-ring seal
inside the fitting.
4. Firmly push the tubing approximately an additional 1/4 inch (6.35 mm)
further into the fitting to completely seat the line into the fitting and
past the O-ring seal.
5. Turn on the system water supply and check for leaks prior to further
use or testing. If a leak is observed, you may not have pushed the
tubing into the push fitting far enough to seal the tubing against the
O-ring. Turn off the system water supply and reseat the tubing as
described above.

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SYSTEM INSTALLATION & INITIALIZATION:
1. Most of the components of this system are plastic and are subject to damage
by ultraviolet light from the sun and other sources such as metal halide lighting.
2. Avoid installing this unit in an area where it may be subjected to bright light
or direct sunlight, as algae is more likely to thrive inside the clear filter housings
when exposed to bright light. The unit must be kept out of areas that are
subject to freezing temperatures.
3. High temperatures greater than 113° F (45° C) must be avoided. If the unit is
used outside, avoid putting the system in direct sunlight or connecting it to a
garden hose that may be exposed to sunlight.
4. Attach the black tap water tubing to the left side of the Sediment Filter Housing
(See page 6 or 7).
5. Attach the yellow drain line to the “Y”- connector at the rear of the system. This
“Y”- connector already has a yellow and green tube attached to it.
6. Attach the blue product line to the front port of the right-hand DI housing.
7. Attach the black tubing and elbow(s) to the membrane housing cap(s).
8. Unscrew the right DI housing and remove the DI cartridge. Reconnect the
empty housing to the threaded cap. Hand tighten.
9. Attach the garden hose adapter (connected to the black tubing) to your cold
water source. Never run hot water (greater than 113° F/45° C ) through the system.
10. A provided ball valve can be located at a convenient place on the black tap
water line. Cut the black tubing in two and reconnect the two cut ends with
the ball valve.
11. Place the yellow concentrate (waste) tubing and the blue purified (product)
water tubing temporarily into a drain. Do not restrict flow from these lines.
12. There is a group of red, white, green and blue sensor wires. At the end of the
wires, you will find a small white connector. Just insert the connector into the
receptacle on the top of the TDS meter. You can then use the Velcro on the
back to mount the meter whereever it’s convenient. For example, you may
even mount it on a wall for easier viewing.
13. Open the cold water supply valve. The pressure should not exceed 80 psi.
14. Check the system to ensure that all fittings are tight and leak-free
before leaving the system unattended. (If anything is leaking, contact
SpectraPure for assistance.)
15. Run both the blue and yellow tubings down the drain for an hour, then
reinstall the DI cartridge. Hand tighten.
(continued on next page)

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INSTALL THE FLOAT VALVE:
1. Drill a 1/2" hole near the top of your reservoir:
NOTE: If you are installing the Float Valve onto an acrylic tank we
recommend using a new Fostner Bit to reduce the chance of
cracking the acrylic.
2. (Refer to Diagram on next page) Remove the Compression Nut from
the float body.
3. Insert the 1/4" Blue Tubing into the 1/2" Compression Nut with the
threads towards the end of the tube.
4. Unscrew and remove the remaining nut from the float body.
5. Insert the float body and washer into the 1/2" hole and tighten the
nut, which securely tightens the float to the tank wall.
6. Push the Compression Nut towards the end of the tubing and screw
the Compression Nut back onto the float body.
7. To tighten, use one 1/2" wrench on the flats of the plastic threads and
another 1/2" wrench on the Compression Nut.
16. Upon startup, air may be trapped in the DI cartridge (housing may not
appear full), this is a normal condition and it will not affect the operation
of the DI section. However, when you later install the Float Valve for
automatic operation, all air must be kept purged from the housing by slightly
unscrewing the housing and letting the running water displace the air until
the housing is full of water. Hand tighten housing once air has been purged.
17. Set the meter to “Line 3” and run the system until the meter reads zero. The
water is now ready to use. You can set the meter to monitor either of the
3 probes at any time.
18. Close the cold water supply valve.
19. Finish the installation by directing or connecting the yellow line to a
permanent drain.
20. Install the included Float Valve onto a collection reservoir. See below.
21. Attach the blue line to the Float Valve.
22. (For -AF Systems) Connect the supplied power supply to the black 2.1 mm
Mini Plug. (See page 9)
NOTE: It may take several days of normal operation for the membrane to
reach its full production rate.

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FLOAT VALVE ILLUSTRATION:
FLOW RESTRICTORS AND TEST STRIPS:
These systems are supplied with TWO Flow Restrictors (FR) - RED and
GREEN. See Pages 8 and 9. The RED FR (pre-installed) produces a preset
waste-to-product ratio of 3:1 and the optional GREEN FR has a 2:1 ratio.
Two Test Strips are provided to determine the Total Hardness (this is NOT
TDS) of your tap water. To test: Dip the colored end into a small tap water
sample for 3 seconds. Remove and do not shake. Wait for 20 seconds and
then match with the closest color block on the back of the package. Color
is stable for 1 minute.
If the Total Hardness is 180 or greater, you should keep the RED FR installed.
If the Total Hardness is less than 180, you may replace the RED FR with
the GREEN FR (see “Working with Push Fittings”). Be sure to note the
orientation of the small “plug” in the end of the removed FR and install the
new FR with the same orientation.
The RED FR has a waste-to-product ratio of 3:1, which will increase the
amount of water used, but also increase the lifetime of the RO membrane.
In hard water conditions, you may use the GREEN FR to save water, but
the RO membrane will not last as long, as it will plug up with hardness
much more quickly.

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HOW IT WORKS:
The increasing water level raises the Float Valve in the reservoir and stops
the flow of water. Pressure builds up in the product line and ASO Valve until
the ASO Valve shuts off the flow of waste water to drain. This “OFF”
condition will be maintained until the reservoir needs more water and the
Float Valve drops, allowing both product and waste water to flow again.
NOTE: This configuration maintains house pressure in the prefilters,
membrane, and pressure gauge when in the “OFF” condition.
Also, this system WILL NOT WORK with any kind of “bladder tank”
attached to the product line.
An optional float kit can be used for filling an additional sump or reservoir.
Our Float Kit (SPFK) includes a Float Valve and 1/4" Union Tee.
THE MANUAL FLUSH VALVE (-MF Versions):
The Manual Flush Valve is located in parallel with the flow restrictor (see
page 8) and, when opened, provides a high flow bypass of waste water
used to purge concentrated brine from the membrane housing and rapidly
flush any particulates from the membrane surface. This is especially useful
in hard water conditions. The valve can be turned ON for 30 seconds at
the start of a fill cycle and/or at the end of a fill cycle. BE SURE to turn the
Flush Valve OFF before making product water.
An optional Booster Pump can be added for installations with less than 40
psi tap water pressure. Be sure to use the BPHF-MF-115 Booster Pump Kit.

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THE AUTOMATIC FLUSH VALVE (-AF Versions):
The Automatic Flush Valve is located in parallel with the flow restrictor
and, when electrically activated, provides a high flow bypass of waste
water used to purge concentrated brine from the membrane housing and
rapidly flush any particulates from the membrane surface. This is especially
useful in hard water conditions. A Pressure Switch and Flush Control
Module (AFC) will activate the Flush Valve at the start of a fill cycle, at the
end of a fill cycle, and for a short time every hour during the fill cycle. This
module is powered by a 24VDC power supply. An optional Booster Pump
can be added for installations with less than 40 psi tap water pressure.
Only use a power supply rated at 24VDC, 2.5A that comes with the
Booster Pump Kit (BPHF-AF-115). Connect the Pump to the black/black
wires on the AFC Module.
BOOSTER PUMP INSTALLATION (Both Versions):
If needed, install the Booster Pump on the black tap water feed line. Be
sure the arrow on the pump head is in the direction of the flow. Replace
the small black power supply (-AF Systems) with the larger black power
supply provided with the Booster Pump Kit. Connect the remaining free
wires and connector on the AFC module to the pump. Systems with 25
and 40 GPD RO membranes should first consider upgrading to the 90
GPD membrane before aquiring the Booster Pump.
Notice: Drinking water add-on kits and bladder tanks are
not compatible with Automatic Flush (AF) systems.

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SEDIMENT PREFILTER REPLACEMENT:
A Sediment Filter will usually last approx. 4-6 months, depending on the
quality of the tap water and quantity of water being produced. (The life
span of the filter is determined by the turbidity, iron content, organics,
and total particulate volume in your water source). The best way to
determine when your Sediment Prefilter needs replacement is to monitor
the Pressure Gauge. When you have a drop in pressure of 15-20% below
your normal gauge pressure, replace the filter. To verify this, run water
through the system without the filter in its housing. If the pressure returns
to your normal house pressure without the filter, you will know the filter
you just took out was plugged up and causing the pressure drop.
**NOTE: A drop in the system’s production is, in most cases, an indication
that the sediment filter has become saturated with contaminants and will
need to be replaced. If you remove the sediment and the pressure does
not return to normal, the carbon filter may be plugged. If your water contains
a great deal of sediment or chlorine, the prefilters may require more
frequent changes to maintain adequate production rate and extended
membrane life.
Sediment Prefilter Replacement
Materials Required: Sediment prefilter (SF-MT-0.5-10),
Filter Wrench (WR-UNIV)
Procedure:
1. Turn off water supply to the system.
2. Using the provided filter housing wrench, remove the first housing on
the left. Unscrew it by rotating it to the left.
3. Remove the old filter and discard.
4. Thoroughly wash the housing with a mixture of hot soapy water and a few
teaspoons of household bleach. Rinse well with clean hot water.
5. Insert the new prefilter into the housing, Screw the housing back onto
the assembly and hand-tighten only.
NOTE: Do not use filter wrench to tighten housings. Over-
tightening will damage housings and void your warranty.
6. Proceed with carbon block filter replacement.

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CARBON BLOCK FILTER REPLACEMENT:
A Carbon Filter will usually lasts 4-6 months ,depending on the chlorine
(or chloramine) content of your tap water and quantity of water being
produced. The best way to determine when your Carbon Block Prefilter
needs replacement is to use a chlorine test kit.
Any chlorine level above 0.1 ppm will cause damage to the membrane
and indicates that the carbon block filter must be changed. To test for
chlorine breakthrough, collect a 10 ml sample of the concentrate from
the yellow tubing and test the chlorine concentration using test kit TK-CL-
10-KIT. If the chlorine concentration is above 0.1ppm, replace the carbon
prefilter.
**NOTE: A drop in the system’s production is, in most cases, an indication
that the sediment filter has become saturated with contaminants, but a
carbon filter may also decrease production if it’s covered with extremely
fine sediment. If the carbon becomes plugged with sediment, it will no
longer be able to remove chlorine.
Carbon Block Filter Replacement
Materials Required: Carbon Block prefilter (CF-0.5-10), Filter Wrench,
Chlorine Test Kit (TK-CL-10-KIT)
Procedure:
1. Turn off water supply to the system.
2. Using the provided filter housing wrench, remove the second housing
from the left. Unscrew it by rotating it to the left.
3. Remove the old filter and discard.
4. Thoroughly wash the housing with a mixture of hot soapy water and
a few teaspoons of household bleach. Rinse well with clean hot water.
5. Insert the new carbon block filter into the housing, Screw the housing
back onto the assembly and hand-tighten only.
NOTE: Do not use filter wrench to tighten housings. Over-tightening
will damage housings and void your warranty.
6. Turn on system water supply and check for leaks.

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DI CARTRIDGE REPLACEMENT:
1. When the reading on the TDS meter (set to “Line 3”) displays “001”, it is
time to replace the SilicaBuster ™ Extended Life Super DI cartridge.
Part number DI-SB-10HC.
2. Turn the system off and remove the cartridge housing by rotating it to
the left until it is free of the threaded head on the bracket.
3. Make sure the DI cartridge is installed in the correct direction as marked on
the cartridge shell and be sure that the top seal is securely attached to the
top of the cartridge.
4. Tighten the cartridge housing by rotating it to the right and hand tighten.
5. Turn on system and check for leaks.
TRM-1 METER Specifications:
Range 0 -9990 PPM
Resolution 1 PPM (0-999 PPM)
10 PPM (1000-9990 PPM)
Accuracy ± 2%
Conversion Factor NaCL
Power Source (2) 1.5V button batteries (LR44 or equiv.)
Battery life Approx 1000 hours
For service or repair of these monitors, please send to:
HM DIGITAL, INC
5819 Uplander Way
Culver City, CA 90230

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RO MEMBRANE REPLACEMENT:
1. Turn off the water supply to the RO system. Place the system where the
membrane housing(s) can be easily accessed.
2. Remove the black tubing from the membrane feed push fitting by
depressing the collar on the fitting with your thumb and pulling the
tubing from the push fitting. You should not have to remove the blue
and yellow tubes.
3. Lift the membrane housing from the retention clips and unscrew the
membrane housing cap. This may require two people.
4. Use a pair of pliers to grasp the membrane stem and pull the membrane
from the housing.
5. Remove the black housing O-ring. Wash the empty housing with soapy
water. Rinse thoroughly with hot, clean water.
6. Insert the new membrane into the housing, with the double O-ring
end first. The O-rings and tube must fit into the recess at the bottom
of the membrane housing. When the membrane is aligned with the
recess, firmly push the membrane into the recess until it bottoms out.
7. Place the black housing O-ring on the housing rim and carefully screw
the lid back on to the base. Hand-tighten.
8. Reconnect the black tubing to the membrane feed push fitting.
9. If you have a dual-membrane system (-180), perform steps 2 thru 8 on
the second membrane.
10. Open the Flush Valve and allow the system to flush for several minutes
to remove any loose particles.
11. Close the Flush Valve and turn on the water supply to the system.
12. Check for leaks.

SpectraPure
®
SpectraPure
®
Inc. 480.894.5437 Call us toll-free 1.800.685.2783
2167 East Fifth St, Tempe, Arizona 85281
20
RO MEMBRANE DIAGNOSTICS:
In order to accurately determine the condition and performance of the
RO Membrane, a conductivity tester capable of reading the tap water
conductivity (or TDS) and the product water conductivity (or TDS) would
typically be required. The CSPDI system comes equipped with such a
device.
You may also use an alkalinity test kit (on softened water sources) or a
hardness test kit (on non-softened water sources).
Note: All water sources are different and are subject to changes in
conductivity from season to season which could affect the TDS
reading depending on the time of the year. For this reason, we
recommend the use of a conductivity (TDS) tester in order to determine
the most accurate measurement for determining the condition of the
RO membrane.
TESTING THE QUALITY OF THE MEMBRANE:
The performance of a RO membrane is measured by its ability to reject
salts or TDS (Total Dissolved Solids). This test may be done using the TRM-1
meter that comes factory-installed on the CSPDI system.
General Procedure:
1. Before doing this test, make sure that the system has been running for
at least 10 minutes.
2. Set the switch on the meter to “Line 1”. This will give you the tap water
TDS. Call it X.
3. Set the switch on the meter to “Line 2”. This will give you the TDS of
the RO water. Call it Y.
4. Subtract RO water TDS from tap water TDS. (X - Y)
5. Divide this quantity by tap water TDS. (X - Y) ÷ X
6. Rejection = [(X - Y) ÷ X ] ×100
TDS in the above procedure is measured in ppm or mg/l.
Important: Test the quality of the membrane once every 6 months.