Excalibur EWR 5075C User manual

BARRIE ●ONTARIO ●CANADA 705.733.8900 WWW.EXCALIBURWATER.COM
REVERSE OSMOSIS SYSTEM
EWR 5075C & EWR 5075E

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
BARRIE ●ONTARIO ●CANADA 705.733.8900 WWW.EXCALIBURWATER.COM
TABLE OF CONTENTS
Introduction .......................................................................................................................................... 2
Filtration Stages .................................................................................................................................... 2
Mechanical Filtration .................................................................................................................... 2
Carbon Blocks................................................................................................................................ 2
Reverse Osmosis Membrane ........................................................................................................ 2
Enalka Filter (Premium Model Only)............................................................................................. 2
In-Line Activated Carbon-Coconut Shell Post Filter ...................................................................... 2
5 Stage Reverse Osmosis Components................................................................................................. 2
Automatic Reverse Osmosis Shut Off Valve (ASO) ....................................................................... 2
Faucet............................................................................................................................................ 3
Holding Tank ................................................................................................................................. 3
Drain Restrictor............................................................................................................................. 3
Water Requirements............................................................................................................................. 3
Installation ............................................................................................................................................ 3
Tools Required .............................................................................................................................. 3
Site Selection for Major Components........................................................................................... 3
Installation Instructions ................................................................................................................ 6
Piping and Instrumentation Drawing.................................................................................................. 11
Reverse Osmosis Stages...................................................................................................................... 11
Start up Instructions............................................................................................................................ 12
Operation and Maintenance............................................................................................................... 12
Normal Operation .......................................................................................................................12
Changing Filters........................................................................................................................... 12
Changing In-Line Activated Carbon Post Filter ........................................................................... 14
Installation of Reverse Osmosis Membrane ...............................................................................14
Sanitizing the Reverse Osmosis System......................................................................................14
Rinsing the Reverse Osmosis System..........................................................................................15
Automatic Shut Off Valve Replacement .....................................................................................16
Technical Data..................................................................................................................................... 16
Troubleshooting guide ........................................................................................................................ 17
Troubleshooting Procedures................................................................................................... 17
Replacement Part numbers ....................................................................................................19
Warranty ............................................................................................................................................. 23

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
BARRIE ●ONTARIO ●CANADA 705.733.8900 WWW.EXCALIBURWATER.COM
INTRODUCTION
Your new Reverse Osmosis Drinking Water System uses a combination of filtration technologies to
reduce unwanted contaminants in your water supply. Your Reverse Osmosis System uses the 5 filtration
stages which combines to give you the best in clear sparkling Reverse Osmosis water.
FILTRATION STAGES
Mechanical Filtration
The Reverse Osmosis Turbidity Pre-filter will remove suspended matter that are larger than 5-micron as
well as silt, dirt, scale and rust. The 5-Micron nominal rating helps give maximum life to the Reverse
Osmosis Membranes.
Carbon Blocks
The Reverse Osmosis Carbon Block Pre-filters contains carbon with a vast network of pores. The
tremendous surface area of these pores (typically 800-1200 square meters per gram of carbon) gives the
Reverse Osmosis carbon very good adsorption sites for substances that contribute to tastes and odors.
The Reverse Osmosis carbon block in the Pre-filters will remove chlorine that may be present in the feed
water. This Reverse Osmosis pretreatment is necessary for membrane protection.
Reverse Osmosis Membrane
The Reverse Osmosis Membrane is the heart of Reverse Osmosis filtration system. The Reverse Osmosis
system is designed to reduce the dissolved mineral content of the water. Minerals picked up in the
environment by the water are measured as Total Dissolved Solids (TDS). In the Reverse Osmosis process,
dissolved minerals are separated from the incoming water (feed water). The Reverse Osmosis excess
minerals are rinsed to drain (the Reject Water) and clean water (permeate water) is stored in tank.
Enalka Filter (EWR 5075E Model Only)
The Reverse Osmosis Enalka filter includes an ultra-clean white granular media. Enalka filter is the last
stage of Reverse Osmosis system to neutralize the pH of water.
In-Line Activated Carbon-Coconut Shell Post Filter
The Reverse Osmosis In-Line Activated Carbon Post Filter is located after the Holding Tank and reduces
tastes and odors that may pass through the Reverse Osmosis system. It adds a final polish to the water.
REVERSE OSMOSIS COMPONENTS
Automatic Reverse Osmosis Shut Off Valve (ASO)
The Reverse Osmosis ASO Valve senses when the product water tank is full and closes the feed water
supply to prevent excess Reverse Osmosis reject water going to drain when the Reverse Osmosis System
is not producing water.

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Faucet
The reverse osmosis faucet is a designer brushed nickel high flow 3/8” design goose neck with ceramic
disc valve.
Holding Tank
The reverse osmosis holding tank is 3.2-gallons plastic designed for the storage and repressurization of
reverse osmosis pure drinking water with valve.
Drain Restrictor
The restrictor is vital for proper operation of the RO membrane cartridge as it keeps water flowing
through the membrane at the proper rate ensuring the water produced is the best quality. It is
recommended the restrictor assembly be periodically inspected to be sure it is clean and unrestricted.
WATER REQUIREMENTS
Source
Municipal / Well Water
System Pressure
30 to 100 psi
Temperature
4oto 38oC (40oto 100oF)
pH
3.0 to 11.0
Maximum TDS
1800 mg/L
Turbidity
< 1.0 net turbidity (NTU)
Hardness (CaCo3)
< 170 mg/L (<10 gpg)
Iron (Fe)
< 0.1 mg/L
Manganese (Mn)
< 0.05 mg/L
Hydrogen Sulfide (H2S)
0.00 mg/L
INSTALLATION
Tools Required
Site Selection for Major Components
The Reverse Osmosis System was designed to fit under a sink, however, because of space limitations or
other reasons, the Reverse Osmosis system's flexible design allows for other locations. When
determining the location of your Reverse Osmosis system remember that access to a cold water tap line,
the household drain, and ease of Reverse Osmosis filter replacement are important considerations.
All Reverse Osmosis components and tubing should be located in an area not exposed to freezing
temperatures. If winter temperatures are severe, the area should be above the minimum temperature
for proper performance. Do not expose Reverse Osmosis system or tubing to direct sunlight.
1. Tape Measure
2. Phillips and Flat Head screwdrivers
3. Adjustable Wrench
4. Variable Speed Drill Driver
9. Teflon Tape
10. Safety Glasses
11. Masking Tape
12. Pencil
5. Center Punch and hammer
6. 7/32”, 1/8” & 1/2” Drill Bits
7. Utility Knife
8. Tubing Cutter

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
BARRIE ●ONTARIO ●CANADA 705.733.8900 WWW.EXCALIBURWATER.COM
Under Sink Installation

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Remote Installation (Basement)

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Drinking Faucet
Reverse Osmosis faucet should be placed near the sink where drinking water is normally obtained.
Convenience of use (filling of water pitchers and glasses), and an open area beneath the Reverse
Osmosis faucet under the sink for attaching product and Reverse Osmosis drain tubing are
considerations. A 2" diameter flat surface is required above and below the Reverse Osmosis installation
site.
Holding Tank
The Reverse Osmosis Holding Tank may be placed where it is convenient within 10 feet of the Reverse
Osmosis faucet; under the sink, in an adjacent cabinet are the best choices or in a basement within 20
feet of the Reverse Osmosis faucet. If a longer run of Reverse Osmosis tubing is required, a transfer
delivery pump may be required extra to boost line pressure.
Manifold Assembly
The Reverse Osmosis manifold can be installed on either the right or left side of the under-sink area or a
cabinet. The right side is recommended because all the Reverse Osmosis tubing will be to the back of
the cabinet and out of the way. Reverse Osmosis Installation in the basement is also an option; one
location is near the laundry/utility sink where cold potable water and rain access are handy. The
mounting location should allow adequate clearance and accessibility for Reverse Osmosis cartridge
changes.
Feed Water Connection
The feed water has the option of angle valve adapter or self-piercing saddle valve. The Reverse Osmosis
Feed Water Saddle Valve should be located as close to the manifold assembly as possible. The angle
valve adapter should be mounted over the faucet supply valve. USE A POTABLE COLD WATER SUPPLY
ONLY TO YOUR REVERSE OSMOSIS SYSTEM. Softened water is preferred as it will extend the life of the
Reverse Osmosis Membrane.
Drain Line Connection
The Reverse Osmosis waste water must go to a drain connection with easy access. Do NOT connect the
Reverse Osmosis system drain line to the dishwasher drain or near the garbage disposal.
Installation Instructions
All plumbing should be done in accordance with local plumbing codes.
In restricted under-sink areas, it may be easier to install the Reverse Osmosis faucet first. Allow
adequate Reverse Osmosis tubing lengths for any final Reverse Osmosis component position.
Push to Connect Fittings
Assembly: - Cut the tube straight at the end and push the tubing into
the grey collar.
Disassembly: - Push the grey release button and pull the tube out.

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Faucet Installation
Installation on Stainless steel sink
•Center punch the hole to provide a starting point for the drill.
•Start with a smaller drill as a pilot and then drill a 1/2” diameter hole to accept the faucet to go
through the countertop.
•Clean away any chips.
•Deburr any sharp edges.
Drilling a porcelain sink
It is best to use a special 1/2” diameter cutter designed for porcelain. A carbide tipped masonry bit is a
second choice.
•Place a piece of tape over the area to be drilled to help prevent chipping.
•Drill a pilot hole for the porcelain cutter. Use the pilot drill supplied with the kit or a carbide tipped
drill.
•When drilling the 1/2” hole, drill slowly and carefully; the porcelain chips easily.
•After drilling, clean the area well. Iron fillings, if left in place, can cause rust stains.
Drilling a Counter top
NOTE: The counter top must be less than 2¼" thick. Treat ceramic tiles as porcelain until the tile is
penetrated, then use the carbide tipped metal cutter.
Formica counter tops may be drilled with a good 1/2" wood bit, drilling a 3/32" pilot hole will help keep
the bit going straight.
Small Rubber Washer
Chrome Plate
Rubber Gasket
Counter Top
Locating Plastic Washer
Lock Washer
Nut

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Feed Water Installation
Self-Piercing feed water saddle valve
Decide on location. Do NOT connect Reverse Osmosis to a hot water feed line. Water over 100oF may
cause permanent damage to the Reverse Osmosis Membrane.
•Shut the water supply off and drain the line by opening the faucet installed downstream of this
location.
•Attach the self-piercing saddle valve and secure and tighten.
•Remove nut from the Reverse Osmosis feed water ball valve.
•Slide the nut onto the ¼” reverse osmosis tubing.
•Insert the ferrule and tube insert onto ¼” tubing.
•Place the ¼” tubing onto the exposed threads of the reverse osmosis feed self-piercing saddle valve.
•Screw the nut onto the Reverse Osmosis feed water ball valve.
Note: - Keep the pipe pressurized while piercing with T-handle after installation
Angle Valve Adapter
•Identify the cold line.
•Shut the faucet supply valve off and drain the water by opening the faucet.
•Fasten the angle valve adapter over the faucet line shut off valve and then install the faucet hose on
angle valve adapter.
•Loosen the cap on ¼” quick connect port and then insert the ¼” tubing.
•Fasten the quick connect port cap. Note: -Only hand tighten, never use wrench or plier.
Figure: - Self Piercing Feed Water Valve

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Holding Tank
•Check the Reverse Osmosis tank pre-charge
pressure. Make sure it is between 5 to 7 psig.
•Pull the cap/plug off the top of the Reverse Osmosis
tank where the Reverse Osmosis Tank Shut-Off
should go.
•Wrap Teflon tape three times around the ¼" male
outlet thread. Wrap in the direction of the threads.
The tape will act as a thread sealant. Screw on the
Reverse Osmosis Holding Tank Shut-Off Valve.
•Locate the 3/8" Reverse Osmosis Tubing. Firmly
press one end into the Reverse Osmosis Holding
Tank Shut-Off Valve and the other end into the tee.
The fittings will grab the Reverse Osmosis tubing and
seal it in place. Make sure the Reverse Osmosis
tubing is pressed all the way in to create a pressure
tight connection.
Figure: - Angle Valve Adapter

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Drain Clamp Assembly
Choose the Reverse Osmosis drain outlet location. The following are instructions for discharging in the
sink drain pipe.
•Position the Drain Clamp on the sink drain pipe above the drain trap. Allow room for drilling. Tighten
securely.
•Use a battery powered or properly grounded drill. Using the Clamp port as a drill guide, drill a 7/32"
hole through the wall of the drain pipe.
•Locate the 3/8" Drain Tubing connected to the Reverse Osmosis System. Route to the Reverse
Osmosis tubing to the Drain Clamp and trim to length.
•Insert the tubing into the Drain Clamp.
CAUTION: The lowest point of the line should be the point of connection to the Reverse Osmosis Drain
Clamp. There should be no sag in the Reverse Osmosis tubing as this may cause excessive noise as the
reject water is flowing to drain.

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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PIPING AND INSTRUMENTATION DRAWING
REVERSE OSMOSIS STAGES
EWR 5075C
Stage#
Description
1St
Sediment Filter 5-Micron
2nd
Carbon Block 10-Micron
3rd
Carbon Block 5-Micron
4th
RO Membrane 75GPD
5th
Coconut Shell Carbon Polisher
EWR 5075E
Stage#
Description
1St
Sediment Filter 5-Micron
2nd
Carbon Block 10-Micron
3rd
Carbon Block 5-Micron
4th
RO Membrane 75GPD
5th
Enalka Filter
6th
Coconut Shell Carbon Polisher

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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START UP INSTRUCTIONS
•Sanitize the system with good quality unscented liquid chlorine household bleach and follow the
sanitizing instruction given in maintenance section of this manual.
•Slowly open the feed water valve counterclockwise and inspect plumbing for leaks.
•Fully open the holding tank valve.
•Let the system to fill holding tank and when system automatically shuts off, then open the faucet to
drain all water stored in holding tank. Repeat this step 2 more times.
•Do not use the water of first three full holding tanks.
CAUTION: The Reverse Osmosis Membrane is shipped with a preservative in it (0.5% sodium
metabisulfite). This will be rinsed out with the first water produced. Allow the Holding Tank to fill
(overnight) and discard the first three full tanks of production.
When the Faucet is first opened, expect air and carbon fines (very fine black powder) from the In-Line
Activated Carbon Post Filter to be rinsed out. This is normal for the first tank of water or after when In-
line filter is changed.
OPERATION AND MAINTENANCE
Tools Required
Normal Operation
Reverse Osmosis systems produce drinking water at relatively slow rates. Normal operation is to let the
Reverse Osmosis Holding Tank fill with water and then draw water as is needed. When the pressure in
the Reverse Osmosis Holding Tank falls to a given pressure (as the water is being used) the Automatic
Shut-Off Valve (ASO Valve) will start water production and the Reverse Osmosis system will refill the
Reverse Osmosis Holding Tank. When the Reverse Osmosis Holding Tank is full and no water is being
used, the ASO Valve will automatically shut off the feed water to conserve water. The more water that is
used (up to the capacity of the system) the better the Reverse Osmosis system will function.
After periods of non-use, such as a week of vacation, it is better to empty the Reverse Osmosis Holding
Tank and allow the Reverse Osmosis system to produce fresh water for use.
1. Basin Wrench or 10” Pipe Wrench
2. Low range air pressure gauge
3. Air Pump
5. Liquid Chlorine Bleach
6. Extra Plastic Tubing
7. Pan or Bucket

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Changing Filters
THIS REVERSE OSMOSIS SYSTEM CONTAINS FILTERS WHICH MUST BE REPLACED AT REGULAR INTERVALS
TO MAINTAIN PROPER PERFORMANCE. USE ONLY FACTORY APPROVED FILTERS.
The recommended interval for changing the Reverse Osmosis filters (not the Reverse Osmosis
Membrane) is every six (6) months. Local conditions may dictate more frequent changes.
•Close the Reverse Osmosis Feed Water Ball Valve by turning fully clockwise and open the Reverse
Osmosis Dispensing Faucet by lifting the handle. Allow the Reverse Osmosis Holding Tank to empty.
•Loosen and remove the Reverse Osmosis Sediment Pre-filter and the Activated Carbon Pre-filter
Housings. Wash the inside of the Reverse Osmosis Housings using a mild detergent and a soft cloth.
Do not use abrasive cleaners or pads. Thoroughly rinse all soap from the Reverse Osmosis Housings
before reassembly.
•Sanitize the Reverse Osmosis system after the replacement of Reverse Osmosis filters:
Note: Always sanitize the system before the installation of Reverse Osmosis Activated Carbon Pre-filter.

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
BARRIE ●ONTARIO ●CANADA 705.733.8900 WWW.EXCALIBURWATER.COM
Changing In-Line Activated Carbon Post Filter
•Close the Reverse Osmosis Feed Water Ball Saddle by turning fully clockwise.
•Close the Reverse Osmosis Holding Tank Valve and then open the Reverse Osmosis Dispensing
Faucet to release the pressure.
•Remove the In-Line Reverse Osmosis Activated Carbon Post Filter. Disconnect the used Reverse
Osmosis Post Filter by pressing in the connector's collar and at the same time pulling the tube out of
the fitting. Unscrew the fittings on the In-Line, re-Teflon tape them and install them on the new
Reverse Osmosis Post Filter. Do not over tighten the fittings.
•Firmly reconnect the polytubes to the new Post Filter.
•Slowly open the Reverse Osmosis Feed Water Saddle Valve.
•When water begins dripping out of the Reverse Osmosis Faucet, in the following order, close the
Reverse Osmosis Faucet and open the Reverse Osmosis Holding Tank Valve. When the Reverse
Osmosis Faucet is first opened, expect air and carbon fines (very fine black powder), from the new
Reverse Osmosis Post Filter to be rinsed out. This is normal for the first tank of water.
At time of start-up and each time the Reverse Osmosis filters are changed the Reverse Osmosis system
should be sanitized.
Installation of Reverse Osmosis Membrane
•Remove the Reverse Osmosis Membrane Housing (the closest of the three to in/out ports)
•Insert the Reverse Osmosis membrane into the Reverse Osmosis Membrane Housing (The O-ring
should be up toward the Reverse Osmosis Membrane Housing Cap). Check the Reverse Osmosis
Housing O-ring for proper position in its groove, engage and firmly tighten the Reverse Osmosis
Housing hand tight only.
•Typical T.F.C. Reverse Osmosis Membrane life expectancy is three to five years with Water Softener
prior to Reverse Osmosis system.
Sanitizing the Reverse Osmosis System
NOTE: The Reverse Osmosis system should be sanitized BEFORE installing the Reverse Osmosis Activated
Carbon Pre-filter and the Reverse Osmosis Membrane.
•Use a drip pan to aid clean-up.
•Use a good quality unscented liquid chlorine household bleach.
•Fully close the feed water valve.

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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•Open the Reverse Osmosis dispensing faucet by lifting the handle and open the Reverse Osmosis
Holding Tank Shut-Off Valve (the handle should be parallel with the valve body).
•Once all the pressure has been released, remove the Reverse Osmosis Housing on the side of the
manifold labeled "SEDIMENT". Pour one capful of bleach (this is approximately 2 tsp. or 10 ml) into
one of the white Housings. Engage and firmly tighten the Reverse Osmosis Housing hand tight only.
•Remove all Reverse Osmosis Housings add one capful of bleach in each. Engage and firmly tighten
the Housings hand tight only.
•Slowly open the Reverse Osmosis Feed Water Valve (turning counter clockwise).
•As soon as the water begins to come out of the Reverse Osmosis Dispensing Faucet, close the
Faucet.
•Let stand for 15 minutes.
NOTE: During this time, check the Reverse Osmosis system carefully for leaks.
•At the end of 15 minutes, CLOSE the Reverse Osmosis Feed Water Ball Valve and open the Reverse
Osmosis Dispensing Faucet. Allow the Reverse Osmosis Holding Tank to completely drain.
•Fully close the feed water valve and then remove the Reverse Osmosis Activated Carbon Pre-filter
Housing and install the Reverse Osmosis activated Carbon Pre-filter.
•Firmly tighten the Reverse Osmosis Housing hand tight only.
Rinsing the Reverse Osmosis System
•Slowly open the Reverse Osmosis Feed Water Saddle Valve fully counter clockwise.
•The Reverse Osmosis Holding Tank Valve should be open. The Reverse Osmosis System is now
making water.
•When the storage tank is full, open the faucet and fully drain the storage tank and repeat this step
again.
•Discard the water of first two full storage tank.

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Automatic Shut Off Valve Replacement
TECHNICAL DATA
Reverse Osmosis water quality is normally measured with a TDS meter. The more dissolved solids in the
water, the higher the conductivity. The results are usually reported in Parts per Million (ppm) or
Milligrams per Liter (mg/l) of Total Dissolved Solids (TDS). (Although technically they are not exactly
equal, in most discussions ppm = mg/l)
Reverse Osmosis Membranes are rated by the amount of dissolved solids that are rejected. This rating is
a ration of the TDS in the feed water to the TDS in the product water and is reported as Percent
Rejection. If the feed water contained 100 ppm of TDS and the product water contained 10 ppm of TDS,
90 ppm have been rejected and the reject ration is 90%.
Percent Rejection =
Feed TDS−Product TDS
Feed TDS
EXAMPLE: Feed water is 500 ppm TDS and the product water is 75 ppm TDS.
Percent Rejection = 500 – 75 x 100%
500
Percent Rejection = 0.85 x 100% or 85%
From 5-Micron
Carbon Block
To RO Membrane
Feed
RO Membrane
Permeate
Polisher (AICRO)
/ Tank Inlet Tee
Red Port

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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TROUBLESHOOTING GUIDE
Troubleshooting Procedures
Problem
Possible Cause
Solution
1) Low quantity of Reverse
Osmosis Product Water
from Holding Tank
a) Reverse Osmosis Feed Water Ball
Valve is plugged or closed
a) Open Valve or unclog
b) Clogged Sediment Pre-filter or
Activated carbon Pre-filter
b) Replace Reverse Osmosis filters
c) Low water pressure
c) Reverse Osmosis feed water pressure must be
above 40 psig
d) Reverse Osmosis membrane is
fouled
d) See feed water operating limits and correct the
cause of fouling, then replace membrane
e) Plugged in-line activated carbon
post filter
e) Replace post filter
f) Air pre-charge pressure in holding
tank is too high
Empty water from Reverse osmosis holding tank and
with the faucet open, adjust air pressure to 5-7 psig
(35-48 kPa) range.
g) Air pre-charge is too low
h) Air bladder in the holding tank is
ruptured
h) Replace the holding tank
i) Holding tank valve is closed
i) Open the holding tank valve
j) No drain flow, the drain restrictor is
plugged
j) Clear or replace Drain Restrictor
k) The check valve is stuck
k) Free the check valve
l) ASO valve is malfunctioning
l) Replace ASO valve
2) Low pressure at the
Reverse Osmosis Dispensing
Faucet
a) In-Line activated carbon post filter
is plugged
a) Replace post filter
b) Air pre-charge in the Reverse
Osmosis Holding Tank is too low
b) Empty water from holding tank with faucet open,
adjust air pressure to 5-7 psig (35-48 kPa)
c) Holding tank valve is partially closed
c) Fully open the holding tank valve
d) The dispensing faucet is out of
adjustment or faulty
d) Repair or replace dispensing faucet
e) Holding tank is depleted after
heavy water usage
e) Allow holding tank to refill or add second holding
tank to increase the storage quantity
f) Low water production
See troubleshooting section#1
3) Tastes and odors in the
product water
a) The in-line or activated carbon pre-
filter is exhausted
a) Replace RO filters
b) There is a foreign matter in the RO
holding tank
b) Clean, flush and sanitize the system. Replace the
filters
c) The product water and drain lines
are reversed
c) Correct plumbing
d) Dissolved gases in the RO feed
water
d) Pre-treat RO feed water to remove dissolved
gases.
e) Increase in product water TDS
e) See high TDS in the RO product water section

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REVERSE OSMOSIS INSTALLATION AND USER GUIDE
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Problem Possible Cause Solution
4) Drain water overflows at
the air gap faucet
a) Drain tubing is clogged
a) Clear drain tubing
b) Drain clamp hole is misaligned
b) Align with hole in the drain pipe
c) Excessive drain flow rate
c) Replace Reverse osmosis drain restrictor
5) High Total Dissolved
Solids (TDS) in the Product
Water
a) Clogged sediment Pre-filter or
Activated Carbon Pre-filter
a) Replace clogged filters
b) Low water pressure
b) Reverse Osmosis feed water pressure must be
above 40 psig
c) RO membrane O-ring is crimped
c) Check or replace O-ring
d) RO membrane brine seal is not
sealing up into the manifold head
d) Check O-ring
e) RO membrane is expended
e) If RO membrane life is unusually short, find
and correct the cause, then replace the
membrane
f) The product water and drain water
lines are reversed
f) Correct plumbing
g) Drain restrictor is clogged
g) Clear or replace RO drain restrictor
h) ASO valve is not closing
h) Repair or replace the RO ASO valve
components
i) New In-line or activated Carbon Pre-
filter not rinsed completely
i) Flush with several full tanks of product water
j) The RO feed water TDS has increased
j) RO feed water TDS will give a corresponding
increase in Product water TDS
6) RO faucet leaks or drips
a) Leaks from spout
a) Adjust RO faucet by turning the tee bar just
below the handle to provide a small amount of
free play in handle when shut off
b) Leaks from base of the delivery
b) O-ring is bad, replace O-ring
c) Leaks from beneath the handle
c) Replace the O-ring or replace the faucet
7) Reverse Osmosis fitting
leaks in general
Close the feed water ball valve and relieve pressure before disconnecting any tubing or
replacing any fitting. Before replacing a fitting, recut and reinsert the tubing to see if that
solves the leak. If pipe threads are leaking, remove and re-tape

19
REVERSE OSMOSIS INSTALLATION AND USER GUIDE
BARRIE ●ONTARIO ●CANADA 705.733.8900 WWW.EXCALIBURWATER.COM
Replacement Part numbers
EWR 5075C
Item # Part Number Description
Changing
Frequency
1 SMF PP1005 Polypropylene 5-Micron Sediment Filter 6 months
2 SMF CBC1010 Carbon Block 10in 10-Micron 6 months
3 SMF CBC1005 Carbon Block 10in 5-Micron 6 months
4 RO TFC75 Membrane Element 2"x10" 75GPD 3 Years
5 SMF AICRO Coconut Shell Carbon 2"x10" Polishing Filter 6 months
6 RO F104 Designer Chrome Faucet N/A
7 RO TNK 5 Holding Tank N/A
8 RO A13 Tank Ball Valve N/A
9 RO FR300EZ Drain Flow Control 300ml N/A
10 RO MEMHOUS Membrane Housing with Cap N/A
11 FH 10SC025 Clear Housing 2.5"x10" N/A
12 FH 10SW025 White Housing 2.5"x10" N/A
13 RO A21 2.5"x2" Mounting Clip N/A
14 RO A19 Membrane Mount N/A
15 RO 4210QC Auto Shut Off Valve (ASO) N/A
16 FH ORINGRO Sump Housing O-Ring N/A
17 6325 60 133WP2 Faucet Adapter 3/8” QC N/A