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INSTALLATION, OPERATION
& MAINTENANCE MANUAL
Watts
®
Residential Reverse Osmosis Systems
MODELS
GTS450S & GTS550S
Please read carefully before proceeding with installation. Failure to follow attached
© Watts 2010
M-WQP-GTS-1041
instructions or operating parameters may lead to the product’s failure.
Refer to enclosed warranty for operating parameters
to ensure proper use with your water supply.
Warning:
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This manual is used for several variations of the same system. Your system may vary slightly
from the pictures or descriptions contained in this manual. It is the end users responsibility
to ensure that this system is installed according to all local codes and regulations.
Thank you for your purchase of a state of the art Reverse Osmosis (RO) water treatment system. Water quality concerns
are becoming more of a focus for the public. You may have heard about contaminants in the drinking water, such as Arsenic,
Chromium, Cryptosporidium or Giardia. There may also be some local water issues such as high levels of Lead and Copper.
This water treatment system has been designed and tested to provide you with high quality drinking water for years to come.
The following is a brief overview of the system.
Your Reverse Osmosis System:
Osmosis is the process of water passing through a semi permeable membrane in order to balance the concentration of
contaminants on each side of the membrane. A semi permeable membrane is a barrier that will pass some particles like clean
drinking water, but not other particles like arsenic and lead.
Reverse osmosis uses a semi permeable membrane; however, by applying pressure across the membrane, it concentrates
contaminants (like a strainer) on one side of the membrane, producing crystal clear water on the other. This is why RO
systems produce both clean drinking water and waste water that is ushed from the system. This reverse osmosis system also
utilizes carbon block ltration technology, and can therefore provide a higher quality drinking water than carbon ltration
systems alone.
Your system is a four (GTS450S) or ve (GTS550S) stage RO which is based upon separate treatment segments within the
one complete water ltration system. These stages are as follows:
5 Stage RO System has 3 vertical bowls. 4 Stage RO System has 2 vertical bowls.
Stage 1 – Sediment lter, recommended change 6 months.
The rst stage of your RO system is a ve micron sediment lter that traps sediment and other particulate matter
like dirt, silt and rust which affect the taste and appearance of your water.
Stage 2 and 3 – Carbon lters, recommended change 6 months - Stage 3 Only on the GTS550S model.
The second and third stages each contain a 5 micron carbon block lter. This helps ensure that chlorine, chloramines
and other materials that cause bad taste and odor are greatly reduced.
Stage 4- Membrane, recommended change 2-3 years.
Stage four is the heart of the reverse osmosis system, the RO membrane. This semi permeable membrane will
effectively take out TDS & Sodium and a wide range of contaminants such as Percholate, Chromium, Arsenic,
Copper, Lead as well as Cysts, such as Giardia and Cryptosporidium. Because the process of extracting this high
quality drinking water takes time, your RO water treatment system is equipped with a storage tank.
Stage 5- Carbon in-line lter, recommended change 6 - 12 months.
The nal stage is an in-line granular activated carbon (GAC) lter. This lter is used after the water storage tank,
and is used as a nal polishing lter.
Note: Filter & Membrane life may vary based upon local water conditions and/or use patterns.
System Maintenance
Just because you can not taste it, does not mean that it is not there. Contaminants such as Lead, Chromium and Arsenic are
undetectable to the taste. Additionally, over time if you do not replace the lter elements, other bad tastes and odors will be
apparent in your drinking water. It is important to change out your lters at the recommended intervals as indicated in this
system manual. When replacing the lter elements, pay special attention to any cleaning instructions.
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With proper installation and maintenance, this system will provide you with high quality water for years
to come. All of our water enhancement products are rigorously tested by independent laboratories for
safety and reliability.
Operational Parameters ........................................................................................................................ 4
Table of Contents
Contents of Reverse Osmosis System .................................................................................................. 4
Tools Recommended For Installation .................................................................................................... 4
How to use the Quick Connect Fittings on Your RO system ................................................................. 5
Drill a Hole for the Faucet in a Porcelain Sink ....................................................................................... 6
Punch a Hole for the Faucet in a Stainless Steel Sink .......................................................................... 6
Adapt-a-Valve Installation ..................................................................................................................... 6
Typical RO Faucet Installation ............................................................................................................... 7
Drain Saddle Installation........................................................................................................................ 8
System Drain Connection ...................................................................................................................... 8
Green Tube Connection - Feed Water .................................................................................................. 9
Yellow Tube Connection - RO Module to Storage Tank ........................................................................ 9
Tank Valve Installation (Metal / Plastic Tank) ......................................................................................... 9
Reverse Osmosis Module Mounting...................................................................................................... 9
Start up Instructions............................................................................................................................. 10
Six Month Maintenance ........................................................................................................................11
Annual Maintenance ........................................................................................................................... 12
Membrane Replacement .................................................................................................................... 13
Check Air Pressure in the Tank ........................................................................................................... 14
Procedure for Extended Non-Use (More than 2 months) .................................................................... 14
Trouble Shooting ................................................................................................................................ 15
Reverse Osmosis System (Diagram / Parts List)
................................................................................ 16
Performance Data Sheet ..................................................................................................................... 17
Arsenic Fact Sheet .............................................................................................................................. 18
Service Record .................................................................................................................................... 19
Limited Warranty ................................................................................................................................. 20
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Operational Parameters
Do not use with water that is micro biologically unsafe or of unknown quality without adequate disinfection
before or after the system. System is intended to be installed on the cold water line only.
Operating Temperatures: Maximum 100°F (37.8°C) Minimum 40°F (4.4°C)
Operating Pressure: Maximum 85 psi (6.0 kg/cm
2
) Minimum 40 psi (2.80 kg/cm
2
)
pH Parameters: Maximum 11 Minimum 2
Iron: Maximum 0.2 ppm
TDS (Total Dissolved Solids) < 1800 ppm
Turbidity < 5 NTU
Hardness: Recommended hardness not to exceed 10 grains per gallon, or 170ppm. System will
operate with hardness over 10 grains but the membrane life may be shortened. Addition of a water
softener may lengthen the membrane life.
Water Pressure: The operating water pressure in your home should be tested over a 24 hour
period to attain the maximum pressure. If the incoming water pressure is above 85 psi a pressure
regulator is recommended and if over 100 psi then a pressure regulator is required.
Copper Tubing: Reverse Osmosis water should not be run through copper tubing as the purity of
the water will leach copper causing an objectional taste in water and pin holes may form in the tubing.
Be sure to follow any state or local regulations during installation.
Contents of Reverse Osmosis (RO) System
5 Stage RO System has 3 vertical bowls. 4 Stage RO System has 2 vertical bowls.
1 Tank – White (Plastic or Metal) 1 Faucet Bag
1 Module – White (Filters Pre-Installed) 1 Manual
1 Parts Bag
Tools Recommended For Installation
√ 1 1/4" Hole Saw Bit for Faucet opening
√ Round Knock out Punch for Stainless Sinks 1/2” & 1¼”
√ Adjustable Wrench
√ Sharp Knife
√ 1 / 2" & 5/8" Open End Wrenches
√ Phillips Screw Driver and bit
√ Needle Nose Pliers – Adjustable Pliers
√ Electric Drill
√ 1/8", 1/4" & 3/8" Drill Bits
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How to use the Quick Connect Fittings on Your RO System
This reverse osmosis system is equipped with quick connect tube ttings for easy
maintenance. The quick connect ttings do not require any tools which makes it a very
simple task to connect and disconnect tubing from the RO module.
To make a connection, the tube is simply pushed into the tting. The unique locking
system holds the tube rmly in place without deforming it or restricting ow. Use the steps
below in reference to any quick connect tube connections throughout this manual.
It is essential that the outside diameter
be free of score marks and that burrs
and sharp edges be removed before
inserting into tting.
Push the tube into the tting, to the tube
stop. The collet (gripper) has stainless
steel teeth which hold the tube rmly
in position while the O-ring provides a
permanent leak proof seal.
Fitting grips before it seals. Ensure tube
is pushed into the tube stop.
Pull on the tube to check that it is secure.
It is a good practice to test the system
prior to leaving site and /or before use.
To disconnect, ensure the system is
depressurized before removing the tube.
Push in the collect squarely against face
of tting. With the collet held in this
position, the tube can be removed. The
tting can then be reused.
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Drill a Hole for the Faucet in a Porcelain Sink
Note:
Most sinks are pre drilled with 1 ½” or 1 ¼” diameter hole that you can use for your
RO faucet. (If you are already using it for a sprayer or soap dispenser, see step 1)
Porcelain sinks are extremely hard and can crack or chip easily.
Use extreme caution when drilling.
Step 1
Determine desired location for the RO faucet on your sink and place
a piece of masking tape over where the hole is to be drilled. Mark the
center of the hole on the tape.
1
Step 2
Step 3
Using a variable speed drill set on the slowest speed, drill a
hole through both porcelain and metal casing of sink at the marked
center of the desired location. Use lubricating oil or liquid soap to keep
the drill bit cool (If drill bit gets hot it may cause the porcelain to crack
or chip).
Using a 1 ¼” hole saw, proceed to drill the large hole. Keep drill speed
on the slowest speed and use lubricating oil or liquid soap to keep the
/8“ pilot
hole saw cool during cutting.
Step 4
Make sure the surroundings of the sink are cooled before mounting the
faucet to the sink after drilling and remove all sharp edges.
Punch a Hole for the Faucet in a Stainless Steel Sink
Note:
Step 5
If mounting faucet to a Stainless Steel Sink you will need a Hole
Punch. The faucet opening should be centered between the back
splash and the edge of the sink, ideally on the same side as the
vertical drain pipe.
Drill a pilot hole & use the Hole Punch and an adjustable wrench to punch the hole in the sink.
Adapt-a-Valve Installation
Conguration for 3/8”
compression ttings
Step 11
Hot
Supply
Cold
Supply
Turn off the cold water supply to the faucet by turning the angle stop valve completely off.
Conguration for 1/2”
compression ttings
Step 12
Attach the adapt-a-valve as illustrated in the three photos above, choosing the conguration
that ts your plumbing. (When attaching the adapt-a-valve to straight pipe threads, use Teon
tape on the threads without the rubber washer.)
Caution:
Water supply line to the system must be from the cold water supply line only.
Hot water will severely damage your system.
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Typical RO Faucet Installation
Drinking Feed Tube Connection
Non Air Gap Faucet
Locate the 3/8” threaded quick connect tting in
the parts bag. After the faucet has been mounted,
thread the tting on the to faucet stem. Connect the
3/8” blue feed tube to the 3/8” quick connect tting on the faucet stem. The nal polishing lter is
clipped on to the top of the RO membrane
housing. Attached to the polishing lter is a 3/8”
quick connect elbow tting. Attach the open end of
the 3/8” blue tubing from the RO faucet to the 3/8”
quick connect elbow on the polishing lter.
ESCUTCHEON PLATE
BLACK RUBBER
WASHER
COUNTER TOP/SINK
LOCK WASHER
3/8” FAUCET CONNECTOR
With Non Air-Gap faucets this will be the only tube
connected to the RO faucet.
3/8” BLUE TUBING FROM
RO MODULE
Air Gap Faucet
Follow the drinking feed tube connection instructions above. Installation instructions for the two
remaining tubes will be outlined in the upcoming
pages.
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ESCUTCHEON PLATE
BLACK RUBBER
WASHER
3/8” LINE TO DRAIN
SADDLE
1/4” RED LINE TO
RO MODULE
COUNTER TOP/SINK
LOCK WASHER
3/8” FAUCET CONNECTOR
3/8” BLUE TUBING FROM
3/8” BLUE TUBING FROM
RO MODULE
RO MODULE
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Drain Saddle Installation - Fits standard 1 ¼” – 1 ½” drain pipes
Caution:
Step 13
Step 14
If you have a garbage disposal, do not install the drain saddle near it.
Installation of the drain saddle must be either above the garbage disposal, or
if a second sink drain is available, install it above the cross bar on the second
drain. Installation of the drain saddle near a garbage disposal may cause the
drain line to plug.
If your RO faucet is non-air gap (Single Tube) use 1/4” Drain Saddle.
If your RO faucet is air gap (Three tubes) use the 3/8” Drain Saddle.
Locate the drain saddle kit in the parts bag.
The small square black foam gasket with a circle cut out of the middle
must be applied to the inside of the drain saddle. Remove sticky tape
Step 15
backing and stick to the drain saddle as shown.
The drain saddle must be mounted at least 1 ½” above the nut of the
P-trap or cross bar from the garbage disposal to insure proper drainage.
Assemble the drain saddle around the drain pipe at the best available
location. Using Phillips screw driver tighten screws evenly and securely
on both sides of the drain saddle. Keep the plastic compression nut
off at this time.
Caution:
Step 16
Do not over tighten the screws. It may crack the drain saddle.
With the drain saddle secured onto the drain pipe, using a 1/4” drill bit
installed in your electric drill, insert the drill bit through the opening in
the drain saddle and drill through the drain pipe.
Caution:
Step 17
It is very important to keep the drill centered to prevent damage of the drain saddle while drilling.
System Drain Connection
* Non Air-Gap Faucet - Single Tube (1/4” Drain Saddle):
Slip the 1/4” red tube from the RO module through the black compression nut included in the
drain saddle kit. Insert the red tube into the opening in the drain saddle and hand tighten the
black nut, and add 1/4 turn with a wrench.
* Air-Gap Faucet - Three Tubes (3/8” Drain Saddle):
If your air-gap faucet has no tubes attached, connect the red tube from
the RO module directly to the 1/4 barb on the faucet. Locate the black
3/8” tube in the parts bag and attach one end to the 3/8” barb on the faucet.
A/G Faucets with tubes pre-attached - Locate the 1/4”X1/4” quick connect tting in the parts
bag and connect one end to the red tube on the RO module . Measure the 1/4” drain tube
feed from the RO faucet to the 1/4”X1/4” tting on the RO module and make a straight cut to
the correct length. Connect the 1/4” drain tube from the RO faucet to the 1/4”X1/4” tting on
the RO module.
All A/G faucets - Measure the 3/8” drain tube from the RO faucet to the drain saddle on the
drain pipe and make a straight cut to the correct length. Slip the 3/8” tube open end through
the black compression nut. Insert the 3/8” tube into the opening in the drain saddle and hand
tighten the black nut, add 1/4 turn with a wrench.
The 3/8” drain tube must be as SHORT and STRAIGHT as possible from the RO faucet to the drain
saddle, making a downward slope from faucet to drain saddle to allow for proper drainage. This is
a gravity fed line and if there is any bend or dip in the tube, the rinse water will not ow into the
drain properly. Water may back up and come out the air gap hole in the back of the faucet.
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Green Tube Connection - Feed Water
Step 19
Connect the green tube to the RO Module quick connect elbow
on the left side of the unit. Remove a brass nut, plastic sleeve and
Step 20
brass insert from the parts bag. To assemble, place the brass nut
on the green tube rst, then the sleeve (small tapered end of sleeve
must point to the end of tube) and then push the brass insert all the
way into the end of the tube. (See Picture)
Insert the green tube into the ¼” opening on the adapt-a-valve until
it stops. Slide the brass nut and sleeve down and thread onto the
male pipe threads. Use a ½” wrench to securely tighten the nut.
Yellow Tube Connection - RO Module to Storage Tank
Step 1
Step 2
Locate the 3/8” Yellow tubing. Connect one open end to the Tee tting on the nal lter that is
clipped on to the RO Membrane housing.
Position the storage tank in desired location. Stand it upright or lay it on its side (using the black
plastic stand). Measure the yellow tube from Tee tting to TANK and cut it to desired length.
Step 3
Insert the open end Yellow 3/8” tube into the 3/8” opening on the tank ball valve.
Tank Valve Installation - Metal Tank
Step 1
Teon tape must be applied in a clockwise direction. Wrap 5 to 7
turns around the male pipe threads (MPT) on the Stainless Steel
tting on top of the tank.
Step 2
Thread the plastic valve onto the tank tting.
Do not over tighten or the valve could crack.
Tank Valve Installation - Plastic Tank
Step 1
Step 2
Make sure the O-ring is located at the bottom of the recess for the
tank connection.
Thread the plastic valve onto the tank tting.
Do not over tighten or the valve could crack.
Reverse Osmosis Module Mounting
Step 21 Determine best location for the RO module to be mounted to allow
for future system maintenance. The parts bag has 2 self tapping
screws. Using an electric drill with a Phillips bit, screw them into
the cabinet wall 6” apart and 16” from the bottom of the cabinet.
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Congratulations!
You have completed the installation of new your Reverse Osmosis system.
Start up Instructions
Step 1
Note:
Turn on the incoming cold water at the angle stop valve. Open the needle valve on the brass
Adapt-a-Valve by turning counter clockwise. Check the system for leaks and tighten any ttings
as necessary. (Check frequently over the next 24 hours to ensure no leaks are present).
If you have connected your RO system to a refrigerator / ice maker, make sure the ice maker
is off (do not allow water to ow to the ice maker) until ushing (Step 4) is complete and the
tank has been allowed to ll completely. Connection from the RO to the ice maker system
should have an in-line valve installed before the ice maker so it can easily be closed to prevent
water owing to the ice maker during start up and periodic maintenance. Your RO tank must
be allowed to ll up fully in order for the ice maker system to work properly.
Please Follow the Startup Instructions.
Step 2
Step 3
Note:
Step 4
Note:
Open the RO faucet and leave it open until water begins to trickle out (it will come out
slowly).
Close the RO faucet allowing the storage tank to ll with water. It may take 3 to 6 hours to
ll the tank completely depending on the production capability of the membrane, local water
temperature and water pressure.
During the ll period you may hear water trickling due to the Reverse Osmosis Process.
After the Tank has lled, open the RO Faucet to ush the tank completely. You will know that
the tank is empty when the ow rate from the RO faucet is down to a trickle. Repeat this step
two more times. The fourth tank can be used for drinking.
The ushing process should take about a day to complete.
Flushing of the tank 3 times is only necessary during the initial startup and after replacing the
membrane.
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Page 11
6 Month System Maintenance
Items needed:
√ Stage 1 - Sediment Filter
√ Stage 2 & 3 - Carbon Block Filter - Stage 3 Only on the GTS550S
Step 1
Turn off the incoming water supply to the RO by turning the needle valve on the adapt-a-valve
clockwise until it stops.
Step 2
Note:
Step 3
Open the RO Faucet and allow water to drain from the tank until it is completely empty.
Water may be saved in a container for drinking or to rinse system parts.
Let system sit for one minute after the tank is empty to let the system depressurize before
attempting to remove lter housings.
Step 4
For more leverage you may leave the RO module attached to wall of cabinet. If you are unable
to access the module while it is mounted, remove it prior to changing lters. Starting with the
closest housing (Stage 1), remove it by turning it clockwise (left), empty water, then discard
lter. Continue on to the 2
Note:
Step 5
If you own a four stage system it will not have the third stage.
A four stage system has two vertical housings instead of three.
Clean the lter housings (bowls) with a mild soap solution and rinse with water. Check O-rings
and lubricate with water soluble lubricant. KY Jelly® or other water based lubricants may be
used. Petroleum based lubricants (such as Vaseline®) must not be used.
Caution:
Step 6
Before re-installing the lter bowls back on to the system, check O-rings to make sure they
are still in place. *
Insert a new sediment lter (cloth like appearance) into the 1st lter housing which is the one
on the water inlet side (green tubing from the adapt-a-valve) of the RO system and re-install
housing.
nd
housing (Stage 2) and 3rd housing (Stage 3).
Step 7
Insert the new Carbon Block lter (White end caps & plastic netting) into the second and
third lter bowls and re-install housings.
Step 8
Turn water supply on to the unit by turning the needle valve on the
adapt-a-valve counter clock wise.
Step 9
Step 10
Open the RO faucet and leave it open until water begins to trickle out
(it will come out slowly).
Close the RO faucet allowing the storage tank to ll with water. It
may take 4 to 6 hours to ll the tank completely depending on the
production capability of the membrane, local water temperature and
water pressure.
*
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Page 12
Annual Maintenance
√ Stage 1 - Sediment Filter
√ Stage 2 & 3 - Carbon Block Filter - Stage 3 Only on the GTS550S
√ Stage 5 - 10” Final Polishing lter
√ 1/2 Cup of hydrogen peroxide or common household bleach.
Note:
Step 1
Sanitizing of unit is recommended.
Perform steps 1 through 5 in the Six Month System Maintenance (Page 11).
Note:
Step 2
If not sanitizing the system skip to step 8.
Remove the RO membrane from its housing and rest in a clean sanitary place. (Refer to
“Membrane Replacement” section on page 15 for directions on removing the membrane).
Replace cap onto empty membrane housing and re-connect green tubing.
Step 3
Leaving the lters out, replace stage 2 and 3 empty lter housings (hand tight) onto unit.
Measure & pour either 1/2 cup of hydrogen peroxide or common household bleach into the
1st lter housing (Stage 1) and hand tighten onto unit.
Step 4
With the RO faucet in the closed position turn on the incoming water supply to the system by
turning the adapt-a-valve counter clockwise. Wait 1 minute for the unit to pressurize. Turn
on the RO faucet and let the water run for 30 seconds. Turn off the RO faucet and let the unit
rest for 2 minutes. Finally, open the RO faucet and let the water run for 5 more minutes.
Step 5
Turn off the incoming water supply to the system by turning the adapt-a-valve clockwise
until it stops. Keep the RO faucet open until the storage tank is completely drained.
Step 6
Open the membrane housing and re-install the RO membrane while making sure not to kink
the O-rings. (Refer to “Membrane Replacement” section on page 13 for directions on
installing the membrane). Tighten the cap back on the housing and reconnect green tubing.
Step 7
Caution:
Remove lter housings Stage 1, 2 and 3 and empty of water.
Before re-installing the lter bowls back on to the system , check O-rings to make sure
they are still in place and lubricate with water soluble lubricant.
Step 8
Insert the new sediment lter (cloth like appearance) into the 1st lter housing which is the one
on the water inlet side (green tubing from the adapt-a-valve) of the RO system and
re-install housing.
Step 9
Insert the new Carbon Block lter (White End Caps) into the 2nd and 3rd housing and
re-install housing.
Step 10
The nal in-line lter is located on the blue tube between the storage tank and the RO faucet.
Remove it by loosening the compression ttings on both ends of the lter and replace with
new lter. (Discard used nal lter after sanitizing)
Note:
The arrow on the nal lter must be pointing towards the RO faucet / away from the
RO storage tank.
Tip:
This is a good time to check the air pressure in your storage tank. For instructions
please see page 14.
Step 11
Follow Steps 8 through 10 in the Six Month System Maintenance (Page 11) for startup
directions.
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Page 13
Membrane Replacement
This reverse osmosis system contains a replaceable component (the RO membrane) which is critical
to the efciency of the system. Replacement of this reverse osmosis membrane should be with one
of identical specications to assure the same efciency and contaminant reduction performance.
Membranes have a life expectancy between 2 and 5 years, depending on the incoming water conditions
and the amount the RO system is used. This reverse osmosis membrane is critical for effective reduction
of total dissolved solids (TDS). The product water should be tested periodically to verify that the system
is performing satisfactorily.
Normally, a membrane would be replaced during a semiannual or annual lter change. However, if at
any time you notice a reduction in water production or an unpleasant taste in the reverse osmosis water,
it could be time to replace the membrane. Watts Premier recommends replacing the membrane when
TDS reduction falls below 75%.
Step 1
Turn off the incoming water supply to the RO by turning the needle valve on the adapt-a-valve
clockwise until it stops.
Step 2
Step 3
Step 4
Open the RO Faucet and allow water to drain from the tank until it is completely empty.
Remove the polishing lter with clips from the top of the membrane housing.
Disconnect the white tube from the elbow on the end cap of the membrane housing.
Removing the membrane:
Step 5
Remove the end cap from the membrane housing by turning it counter clockwise to loosen.
Step 6
You may remove membrane housing from the holding clips. Using a pair of pliers, grip the
PVC tube of the RO membrane and pull rmly on the membrane to remove from the housing
and discard.
Installing the membrane:
Step 7
Lubricate the O-rings on the new membrane with a water soluble
lubricant such as KY Jelly ®. Insert the end with the two black
O-rings on the PVC tube rst into the housing.
Step 8
Once membrane has been inserted into the housing you must take
your thumbs and give a rm push to properly seat the membrane.
Replace membrane housing cap and tighten.
Step 9
After replacing membrane housing into the holding clips, re-attach the white tube to the quick
connect elbow tting on the end cap of the membrane housing.
Step 10
Clip the nal polishing lter back on to the membrane housing and follow the Start Up
Instructions on page 10.
Page 13
Page 14
Check Air Pressure in the Tank
Important:
Step 1
Check air pressure only when tank is empty of water!
Check air pressure in the storage tank when you notice a decrease in available water from
the RO system. Air can be added with a bicycle pump using the schrader valve that is located
on the lower side of the tank behind the blue plastic cap.
Turn off the incoming water supply to the RO by turning the needle
valve on the adapt-a-valve clockwise until it stops. (Follow the green
tube away from the RO system to nd the adapt-a-valve.)
Step 2
Tip:
Step 3
Open the RO Faucet and allow water to drain from the tank until
it is completely empty.
When water from the RO faucet slows to a trickle, with the faucet still in the open position, you
may add air to the tank to purge any left over water, this will ensure that the tank is completely
empty.
Once all water in the tank is purged, check air pressure using an air pressure gauge, it should
read between 5 - 7 PSI. (Digital air pressure gauge is recommended)
Step 4
Follow startup procedure on page 10.
Procedure for Extended Non-Use (More than 2 months)
Turn off the water supply by turning the “T” on the adapt-a-valve clockwise until it stops and
open the RO faucet to empty the storage tank (Save a few ounces of RO water). Once the
storage tank is empty, remove the membrane and place it in a sealed plastic bag with the RO
water saved earlier and store in your refrigerator.
For restart, reinstall membrane (See page 13 for membrane installation procedure) and follow
startup procedure on page 10.
Page 14
Page 15
TROUBLE SHOOTING
Problem Cause Solution
1. Low/Slow Production Low Water Pressure Assure a minimum of 40 psi incoming water pressure.
Premier sells a booster pump if home water pressure is
low. Make sure water supply is turned on and Adapta
Valve is all the way open.
Crimps in tubing Check tubing and straighten or replace as necessary.
Clogged pre-lters Replace pre-lters.
Fouled membrane Replace membrane and ow restrictor.
2. Milky colored Water Air in system Air in the system is a normal occurrence with initial
start up of the RO system. This milky look will
disappear during normal use within 1-2 weeks. If
condition reoccurs after lter change, drain tank 1 to 2
times.
3. Water constantly Low water pressure See #1 Above
running, unit will not
shut off Crimp in supply tube Check tubing and straighten or repair as necessary.
High water pressure Check incoming water pressure to make sure it does
not exceed 80 psi. A pressure relief valve may be
necessary.
High pressure in Tank Empty storage tank of water. Set tank air pressure
between 5-7 psi. See previous page.
Low Pressure in Tank Use a Digital Air Gauge for best results. The empty
tank pressure should be 5-7 psi. See page 14.
4. Noise / Water from faucet Crimp or restriction Check tubing and straighten or repair as necessary.
vent hole or noise from in drain line Straighten all drain lines. Clear blockage. Cut off any
drain. Excess tubing
Drain tube clogged Caused from dishwasher or garbage disposal.
Disconnect the 3/8” black line at the drain, clean the
3/8” black line out with a wire, then reconnect. Blowing
air through the line will not always remove the clog.
5. Small amount of water in System starting up Normally it takes 4-6 hours to ll tank. Note: low
storage tank incoming water pressure and/or temperature can
drastically reduce production rate.
Low water pressure See #1 above.
To much air in tank Tank air pressure should be 5-7 psi when empty of water.
If below 5 psi add air or bleed if above 7 psi.
Check only when tank is empty of water.
See previous page.
6. Water leaks from the blue Not properly tightened Tighten the bowl.
or white lter housing Kinked O-ring Turn off the water supply and release the pressure.
Replace the O-ring if necessary. Then lubricate it and
make sure the O-ring is seated in the lter bowl
properly before reinstalling the lter bowl.
7. Low water ow from faucet Check air pressure in tank Use a Digital Air Gauge for best results. The empty
tank pressure should be 5-7 psi. See page 14.
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5 Stage Reverse Osmosis System
Third Filter Bowl on
GTS550S System Only
Page 16
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Watts Water Technologies
1725 W. Williams Drive C-20
Phoenix, AZ 85027 USA
GTS450S / GTS550S
GENERAL USE CONDITIONS:
1. System to be used with municipal or well water sources treated and tested on regular basis to insure bacteriological safe quality. DO NOT
is micro biologically unsafe or unknown quality without adequate disinfection before and after the system. Systems certied for cyst reduction may be used on
disinfected water that may contain lterable cysts.
2. Operating Temperature: Maximum: 100°F (40.5°C) Minimum: 40° (4.4°)
3. Operating Water Pressure: Maximum: 100 psi (7.0kg/cm2) Minimum: 40 psi (2.8kg/cm2)
4. pH 2 to 11
5. Maximum iron present in incoming feed water supply must be less than 0.2 ppm.
6. Hardness of more than 10 grains per gallon (170 ppm) may reduce membrane life expectancy.
7. Recommend TDS (Total Dissolved Solids) not to exceed 1800 ppm.
use with water that
RECOMMENDED REPLACEMENT PARTS AND CHANGE INTERVALS:
Note: Depending on incoming feed water conditions replacement time frame may vary.
Description Part # Change time Frame
Sediment Filter, 5 Micron, 9 7/8”: #FPMB5-978 6 Months
Carbon Block, 5 Micron, 9 3/4”: #WCBCS975 6 Months
In-line Carbon Filter: #AICRO 12 Months
TFC Membrane, 50GPD @60PSI: #W-1812-50 2 to 5 years
Avg. In. Avg. Eff. % Reduction pH Pressure Max Eff. Inf. challenge Max Allowable
(mg/L) (mg/L) mg/L concentration concentration
mg/L mg/L
Bacteria* 99.9999%
Virus* 99.99%
Arsenic (Pentavalent) 334.62 ug/L 5.039 ug/L 98.4% 50psi 19 ug/L 0.30±10% 0.010 mg/L
Barium Reduction 10.2 0.13 98.7% 7.24 50psi 0.27 10.0±10% 2.0
Cadmium Reduction 0.031 0.0001 99.7% 7.49 50psi 0.0009 0.03±10% 0005
Chromium (Hexavalent) 0.30 0.006 98.0% 7.24 50psi 0.013 0.03±10% 0.1
Chromium (Trivalent) 0.30 0.003 99.0% 7.24 50psi 0.008 0.03±10% 0.1
Copper Reduction 3.0 0.04 98.7% 7.64 50psi 0.06 3.0±10% 1.3
Cysts 222,077#/ml 10 #/ml 99.99% 50psi 58 minimum 50,000/mL N/A
Fluoride Reduction 8.0 0.33 95.9% 7.49 50psi 0.47 8.0±10% 1.5
Lead Reduction 0.15 0.004 97.3% 7.49 50psi 0.008 0.15±10% 0.0107
Nitrite and Nitrate 29.2 6.6 77.3% 7.64 50psi 10.0 3.0±10% 10.0
Nitrate Reduction 26.3 6.1 76.8% 7.64 50psi 10.0 3.0±10% 10.0
Nitrite Reduction 2.8 0.5 82.1% 7.64 50psi 0.77 3.0±10% 1.0
Perchlorate 0.10 0.003 96.5% 7.39 50 psi 0.005 mg/L 0.10±10% 0.006
Radium 226/228 25pCi/L 5pCi/L 80.0% 7.24 50psi 5pCi/L 25pCiL±10% 5pCiL
Selenium 0.10 <0.001 99.0% 50psi <0.001 0.10±10% 0.05
TDS 764 36 95.2% 7.84 50psi 50.0 750±40mg/L 187
Turbidity 81 NTU 0.15 NTU 99.8% 50psi 0.28 NTU 11±1 NTU 0.5 NTU
Recovery - 16.34% Daily Production Rate - 17.32 GPD Efciency - 8.91%
*independantly tested and veried by Bio Vir Laboratories
Depending on water chemistry, water temperature, and water pressure Watts R.O. Systems production and performance will vary.
Efciency rating means the percentage of the inuent water to the system that is available to the user as reverse osmosis treated water under
operating conditions that approximate typical daily usage. Recovery rating means the percentage of the inuent water to the membrane portion of
the system that is available to the user as reverse osmosis treated water when the system is operated without a storage tank or when the storage
tank is bypassed. There is an average of 4 gallons of reject water for every 1 gallon of product water produced.
REFER TO OWNER’S INSTALLATION/SERVICE MANUAL FOR FURTHER MAINTENANCE REQUIREMENTS AND WARRANTY INFORMATION.
Phone: 800-659-8400 Fax: 800-659-8402 www.watts.com
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Arsenic Fact Sheet
Arsenic (As) is a naturally occurring contaminant found in many ground waters.
Arsenic in water has no color, taste or odor. It must be measured by an arsenic
test kit or lab test.
Public water utilities must have their water tested for arsenic. You can obtain the
results from your water utility contained with in your consumer condence report.
If you have your own well, you will need to have the water evaluated. The local
health department or the state environmental health agency can provide a list of
test kits or certied labs.
There are two forms of arsenic: pentavalent arsenic (also called As (V), As (+5))
and trivalent arsenic (also called As (III), As (+3)). In well water, arsenic may be
pentavalent, trivalent, or a combination of both. Although both forms of arsenic are
potentially hazardous to your health, trivalent arsenic is considered more harmful
than pentavalent arsenic.
RO systems are very effective at removing pentavalent arsenic. A free chlorine
residual will rapidly convert trivalent arsenic to pentavalent arsenic. Other water
treatment chemicals such as ozone and potassium permanganate will also change
trivalent arsenic to pentavalent arsenic. A combined chlorine residual (also called
chloramine) where it does convert trivalent arsenic to pentavalent arsenic, may
not convert all the trivalent arsenic in to pentavalent arsenic. If you get your water
from a public water utility, contact the utility to nd out if free chlorine or combined
chlorine is used in the water system.
This Watts reverse osmosis system is designed to remove up to 98% of pentavalent
arsenic. It will not convert trivalent arsenic to pentavalent arsenic. Under laboratory
standard testing conditions, this system reduced 0.30 mg/L (ppm) pentavalent
arsenic to under 0.010 mg/L (ppm) (the USEPA standard for drinking water). Actual
performance of the system may vary depending on specic water quality conditions
at the consumer’s installation.
The RO membrane component of this reverse osmosis system must be maintained
according to its recommended maintenance cycle. Specic component identication
and ordering information can be found in the installation/operation manual
maintenance section.
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Service Record
Date of Purchase:__________ Date of Install:___________ Installed by:__________________
Date
1st stage
Sediment
(6 months)
2 nd stage
Carbon
(6 months)
3rd stage
Carbon
(6 months)
*
W500S Only
Final Filter
Carbon
(1 year)
TFM
Membrane
(2-5 years)
NOTES:
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Limited Warranty
What your Warranty Covers:
If any part of your Reverse Osmosis System is defective in workmanship (excluding replaceable lters and membranes), return
unit after obtaining a return authorization (see below), less tank, within 1 year of original retail purchase, WATTS will repair or,
at WATTS option, replace the system at no charge.
How to obtain Warranty Service:
For warranty service, call
800-659-8400 for documentation and a return authorization number. Once the return authorization
number has been created, ship your Reverse Osmosis unit (less tank) to our factory, freight and insurance prepaid, with proof of date
of original purchase. Include a note stating the problem experienced and include your name, address and your return authorization
number. No returns will be accepted with out the proper return authorization number. WATTS will repair it, or replace it, and ship
it back to you prepaid.
What this warranty does not cover:
This warranty does not cover defects resulting from improper installation, (contrary to WATTS printed instructions), from abuse,
misuse, misapplication, improper maintenance, neglect, alteration, accidents, casualties, re, ood, freezing, environmental factors,
water pressure spikes or other such acts of God.
This warranty will be void if defects occur due to failure to observe the following conditions:
1. The Reverse Osmosis System must be hooked up to a potable municipal or well cold water supply.
2. The hardness of the water should not exceed 10 grains per gallon, or 170 ppm.
3. Maximum incoming iron must be less than 0.2 ppm.
4. The pH of the water must not be lower than 2 or higher than 11.
5. The incoming water pressure must be between 40 and 85 pounds per square inch.
6. Incoming water to the RO cannot exceed 105 degrees F (40 degrees C.)
7. Incoming TDS/Total Dissolved Solids not to exceed 1800 ppm.
8. Do not use with water that is micro biologically unsafe or of unknown quality without
adequate disinfection before or after the system.
This warranty does not cover any equipment that is relocated from the site of its original installation.
This warranty doe not cover any charges incurred due to professional installation.
This warranty does not cover any equipment that is installed or used outside the United States of America and Canada.
LIMITATIONS AND EXCLUSIONS:
WATTS WILL NOT BE RESPONSIBLE FOR ANY IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE. WATTS WILL NOT BE RESPONSIBLE FOR ANY INCIDENTAL OR
CONSEQUENTIAL DAMAGES, INCLUDING TRAVEL EXPENSE, TELEPHONE CHARGES, LOSS OF REVENUE, LOSS
OF TIME, INCONVENIENCE, LOSS OF USE OF THE EQUIPMENT, AND DAMAGE CAUSED BY THIS EQUIPMENT
AND ITS FAILURE TO FUNCTION PROPERLY. THIS WARRANTY SETS FORTH ALL OF WATTS RESPONSIBILITIES
REGARDING THIS EQUIPMENT.
OTHER CONDITIONS:
If WATTS chooses to replace the equipment, WATTS may replace it with reconditioned equipment. Parts used in repairing or
replacing the equipment will be warranted for 90 days from the date the equipment is returned to you or for the remainder of the
original warranty period, whichever is longer. This warranty is not assignable or transferable.
YOUR RIGHTS UNDER STATE LAW:
Some states do not allow limitations on how long an implied warranty lasts, and some states do not allow the exclusion or limitation
of incidental or consequential damages, so the above limitations or exclusions may not apply. This warranty gives you specic
legal rights, and you may have other legal rights which vary from state to state.
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