SpectraPure Eliminator RO 100-LP User manual

v2 2014-01-31
Eliminator RO™
Reverse Osmosis Water Purification System
(Single and Dual Membrane Models)
Eliminator RO™ 100-LP
Eliminator RO™ 200-LP
Eliminator RO™ 400-LP
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.

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SpectraPure
®
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:
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. If you have any questions or concerns, please
contact our customer service department at 1.800.685.2783.
Introduction ........................................................................................................... 3
System Specifications ........................................................................................... 4
System Description ............................................................................................... 5
Single Membrane System .................................................................................... 6
Dual Membrane System ...................................................................................... 7
Rear Views ............................................................................................................. 8
Working With Push Fittings ............................................................................... 9
System Installation & Initialization ................................................................. 10
Install the Float Valve ....................................................................................... 11
Float Valve Illustration ...................................................................................... 12
How the Float System Works .......................................................................... 12
Using the Manual Flush Valve ......................................................................... 13
Flow Restrictors and Test Strips ...................................................................... 13
Sediment Prefilter Replacement ...................................................................... 14
Carbon Block Filter Replacement ................................................................... 15
RO Membrane Replacement ............................................................................ 16
RO Membrane Diagnostics .............................................................................. 1 7
Testing the Quality of the Membrane ............................................................ 17
Membrane Production Calculation ................................................................. 18
Tips for Long Membrane Life ........................................................................... 19
Troubleshooting Guide ..................................................................................... 20
Terms and Conditions ....................................................................................... 21
Three Year Limited Warranty ........................................................................... 22
Optional Accessories ......................................................................................... 23
Replacement Parts ............................................................................................. 24
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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The Eliminator RO 100, 200, and 400 Systems are low-waste RO systems
which have been specifically designed for hydroponic, vegetable and
flower gardens. Purified water grows healthier, more beautiful and
longer-lasting plants than ordinary tap water. The Eliminator RO™
Systems maximize nutrient uptake and stabilize pH for faster growth and
greater yields while eliminating up to 99% of contaminants harmful to
plant growth. Your plants will flourish with our “better than rain” quality water.
Dimensions: 100/200: 16" H x 15" W x 7" D 400: 17.5" H x 15" W x 7" D
The Eliminator RO™ Systems come complete with:
• 100 gallon per day, high-rejection Spectrapure advanced thin-film
membrane in the Eliminator RO™ 100
(200 gallon per day membrane for the Eliminator RO™ 200)
(2x 200 gallon per day membranes for the Eliminator RO™ 400)
• 2:1 waste ratio produces 50% less waste water
• Long-life high-efficiency 1 micron sediment filter
• Highest-capacity 1 micron carbon block prefilter eliminates chlorine,
herbicides and other organic pollutants
• Manual flush valve for longer membrane life
• Automatic ShutOff Valve saves water
• Inline ball valve for manual system shut off
• Float valve for unattended operation
• Clear filter housings
• Tri-color custom pressure gauge indicates when to change prefilters
• Durable, no rust mounting bracket
• 6-foot feed, product and waste tubing included
• Housing wrench for easy filter removal
• Garden hose adapter for tap water hookup
• 3-year warranty

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SYSTEM SPECIFICATIONS:
Sediment Prefilter 1 micron sediment prefilter
Carbon Filter 1 micron carbon block prefilter
RO Membrane Type Thin-Film Composite (TFC)
Rejection Rate 98% average
Input Water Pressure 60 psi (4.15 bar) line pressure*
Input Water Temp 77°F (25°C)
Typical Membrane Rejection 98%
Dimensions:
Elim RO 100, Elim RO 200 16" H x 15" W x 7" D (One Membrane)
Elim RO 400 17.5" H x 15" W x 7" D (Two Membranes)
Permeate flow and TDS rejection is based on the following test conditions:
250 ppm softened tap water, 77° F (25° C), 15% 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 salt rejection.
Reverse Osmosis Operating Limits:
Operating Pressure* 40 – 80 psi (2.75 – 5.5 bar)
pH Range 2 – 11
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.
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.

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SYSTEM DESCRIPTION:
The Eliminator™ System gives you a continuous supply of sparkling
clear water for hydroponics, etc. The reliability with the Eliminator™
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
1 micron 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 1 micron carbon block prefilter. This
filter is used to remove organics and chlorine from the feed water that can
damage the membrane. The final 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 and automatically rinsed from the membrane and sent
down the drain.
A pressure-operated Shutoff Valve and Float Valve are provided for
convenient filling of a storage reservoir.
A manually-operated Flush Valve 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 SYSTEM - 100 GPD & 200 GPD:
TFC RO Membrane (ELIM-MEM-100 or
ELIM-MEM-200) & Housing
Pressure
Gauge
1 micron
Sediment
Prefilter
(ELIM-SF-1-10)
1 micron
Carbon Block
Filter
(ELIM-CF-1-10)
BLACK
1/4”
Tap Water
Tubing
Attaches
Here
BE SURE TO CONNECT BLACK TUBING AND
ELBOW TO END OF MEMBRANE HOUSING

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DUAL MEMBRANE SYSTEM - 400 GPD:
2x TFC RO Membranes
(ELIM-MEM-200) & Housings
Pressure
Gauge
1 micron
Sediment
Prefilter
(ELIM-SF-1-10)
1 micron
Carbon Block
Filter
(ELIM-CF-1-10)
BLACK
3/8”
Tap Water
Tubing
Attaches
Here
BE SURE TO CONNECT BLACK TUBING AND
ELBOW TO END OF MEMBRANE HOUSING

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REAR VIEWS:
DUAL MEMBRANE SYSTEM
Waste
Water
Port
Product
Water
Port
Filtered
Input
Water
Port
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
Flow Restrictor in
Red (or Green)Tubing
This End has
Small “Plug”
SINGLE MEMBRANE SYSTEM
Waste
Water
Port
Product
Water
Port
Flush Valve
(Closed Position)
Open to Flush
Auto ShutOff 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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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 red tube attached to it.
6. Attach the blue product line to the open port of the ASO Valve (see
page 8).
7. Attach the black tubing and elbow(s) to the membrane housing
cap(s).
8. 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.
9. 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.
10. Place the yellow concentrate (waste) tubing and the blue purified
(product) water tubing temporarily into a drain. Do not restrict flow
from these lines.
11. Open the cold water supply valve. The pressure should not exceed 80 psi .
12. 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.)

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NOTE: It is recommended that at least 2 gallons (7.57 liters) of purified water
be discarded now before collecting purified water for use. If the unit
is not used for several days, run the system for at least 10 minutes
before collecting any water. This will flush out any stale water in the
system.
13. Finish the installation by directing the yellow line to a drain.
14. Install the included Float Valve onto a collection reservoir.
15. Attach the blue line to the Float Valve.
NOTE: It may take several days of normal operation for the membrane to
reach its full production rate.
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.

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FLOAT VALVE ILLUSTRATION:
HOW THE FLOAT SYSTEM 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. Now that
BOTH the waste and product lines are blocked off, this “OFF” condition
will be maintained until the reservoir needs more water and the Float
Valve drops, relieving the pressure on the ASO Valve and allowing both
product and waste water to flow again.
NOTE: This configuration maintains tap water 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 may be used for filling an additional sump or reservoir.
Our Float Kit (ELIM -SPFK) includes a Float Valve and 1/4" Union Tee.

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USING THE MANUAL FLUSH VALVE:
The Flush Valve is located in parallel with the flow restrictor 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. Open the valve (handle in line with the body of the
valve) for 30 seconds near the end of the filling process. The Flush Valve
will operate even when the System is otherwise turned off.
BE SURE TO CLOSE THE VALVE BEFORE THE NEXT FILL CYCLE,
OTHERWISE, THE SYSTEM WILL NOT OPERATE PROPERLY.
FLOW RESTRICTORS & TEST STRIPS:
These systems are supplied with TWO Flow Restrictors (FR) - RED and
GREEN. See Page 8. 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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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 Pres-
sure Gauge. When you have a drop in pressure of15-20% 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 con-
tains 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: 1 micron Sediment Filter (ELIM-SF-1-10),
Filter Wrench (ELIM-WR)
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 clockwise as viewed from the top.
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 can 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: 1 micron Carbon Block Filter (ELIM-CF-1-10),
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 clockwise as viewed from the top.
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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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, 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 particles.
11. Close the Flush Valve and turn on the water supply to the system.
12. Check for leaks.
Proper Orientation
of New Membrane in
Relation to Housing

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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.
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 procedure will require a TDS
Meter. SpectraPure offers several models:
MTR-TDS-EZ HM Digital Hand-held TDS Meter
MTR-TDS-DM1 HM Digital Inline Dual Probe TDS Meter
General Procedure:
1. Measure tap water TDS. (Call it X)
2. Run the system for 15 -20 minutes.
3. Rinse test instrument cell 2-3 times with RO water.
4. Measure RO water TDS directly from the blue product water line.
(Call it Y).
5. Subtract RO water TDS from tap water TDS. (X - Y)
6. Divide this quantity by tap water TDS. (X - Y) ÷ X
7. 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.

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Rejection of the RO Membrane Calculation Example
1. Tap water TDS = 150 ppm (X)
2. RO water TDS = 15 ppm (Y)
3. X - Y = 135 ppm
4. (X - Y) ÷ X = 135 ÷ 150 = 0.90
5. Rejection = [ ( X - Y) ÷ X ] ×100 = 0.90 ×100 = 90%
NOTE: Rejection rates less than 95% may indicate that the membrane should be
replaced.
MEMBRANE PRODUCTION CALCULATION:
Membranes produce the rated gallons per day (GPD) at 60 psi (4.1 bars)
operating pressure, 77°F (25°C) operating temperature and with no more
than 500 ppm total dissolved solids.
Membrane output gallons per day (GPD) depends on operating pressure,
water temperature and the TDS in the feed water.
Expected GPD = Rated GPD × PCF × TCF
PCF is the pressure correction factor
TCF is the temperature correction factor
Calculation of Pressure Correction Factor (PCF): The output (GPD) from
the membrane is directly proportional to the applied pressure.
NOTE: The membrane is rated to produce the rated GPD at 60 psi. For any
pressure other than 60 psi the output GPD is multiplied by the PCF.
PCF = Line Pressure (in psi) ÷ 60
Calculation of Temperature Correction Factor (TCF): The output (GPD)
decreases with a decrease in temperature. This is due to water viscosity
increasing with a decrease in water temperature.

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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
Membrane Output Calculation Example
What is the expected GPD from a 100 GPD System at 40 psi pressure and
60°F water temperature?
PCF = 40 ÷ 60 = 0.666
TCF = 0.754 (from Table above)
Expected GPD = 100 × 0.666 × 0.754 = 50.2 GPD ± 15%
50.2 GPD would be the Actual Production Rate
TIPS FOR LONG MEMBRANE LIFE:
1. Replacement of sediment filter at least once every 6 months.This will
prevent membrane fouling due to silt or sediment depositing on the
membrane.
2. Replacement of carbon block filter at least once every 6 months or
when chlorine breakthrough occurs. This will ensure good membrane
life and protect the membrane from chlorine damage.
3. Membrane should not be operated at lower than the minimum 2:1
concentrate to purified water ratio.
4. Operating reverse osmosis systems on softened feed water greatly
reduces the chances of membrane fouling.
5. Use the flush valve after each use of the system to extend membrane
life. It can be operated even when the system has been turned off. This
is especially useful in hard water conditions.

SpectraPure
®
SpectraPure
®
Inc. 480.894.5437 Call us toll-free 1.800.685.2783
2167 East Fifth St, Tempe, Arizona 85281
20
STORAGE
1. It is recommended that you store your RO System in a cool and dark
place when not being used.
2. Your RO System must always be protected from freezing or
temperatures above 113° F (45°C)
TROUBLESHOOTING GUIDE:
Product Water - Low Production Rate
Cause Corrective Action
Plugged prefilters Replace prefilters
Low water temperature Heat feed water or use higher GPD membrane
Low water pressure Use booster pump or use higher GPD membrane
Fouled membrane Replace membrane
No production Flush Valve may be open
Membrane Troubleshooting Guide
The following chart illustrates the procedure for determination of RO membrane
performance. However, the chart represents only rough guidelines for determin-
ing performance of RO membrane. Depending on your tap water chemistry, the
rejection characteristics of the membrane may vary significantly.
Method of
Testing Calculate % Rejection Test Results Conclusion
TDS/
Conductivity
Tester
Measure feed water and
RO product water TDS/
Conductivity
Is Rejection
greater than
95%?
No - Replace Membrane
Yes - Membrane OK
Alkalinity
Test Kit
Measure feed water
and RO product water
Alkalinity
Is Rejection
greater than
95%?
No - Replace Membrane
Yes - Membrane OK
Hardness
Test Kit**
Measure feed water and
RO product water
Hardness
Is Rejection
greater than
95%?
No - Replace Membrane
Yes - Membrane OK
**Caution: This test is not to be used on softened water sources.