Watts WQT4RO11-50 User manual

WARNING
!
Please read carefully before proceeding with
installation. Your failure to follow any attached
instructions or operating parameters may lead to the
product’s failure.
Keep this Manual for future reference.
WARNING
!
Do not use with water that is microbiologically unsafe or of
unknown quality without adequate disinfection before or
after the system.
If you are unsure about installing your WATTS®water filter, contact
a WATTS representative or consult a professional plumber.
Test the water periodically to verify that the system is performing
satisfactorily. Discard small parts remaining after the installation.
Failure to install the system correctly voids the warranty.
Handle all components of the system with care. Do not drop,
drag or turn components upside down.
Be sure the floor under the water filter system is clean, level
and strong enough to support the unit.
IMPORTANT
CAUTION
!
NOTICE
Installation, Operation
and Maintenance Manual
Quick-Twist Reverse Osmosis System
Model WQT4RO11-50
IOM-WQT4RO11-50 WP299327

Page 2
Thank you for your purchase of a state of the art Watts Reverse Osmosis (RO) water treatment system. Water
quality concerns are becoming more of a focus for the public. This Watts water treatment system has been
designed and tested to provide you with high quality 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
substances like clean water, but not other substances such as salts and minerals.
Reverse osmosis uses a semi permeable membrane; however, by applying pressure across the membrane, it
concentrates contaminants on one side of the membrane, producing clean water on the other. This is why RO
systems produce both clean drinking water and waste water that is ushed from the system.
Your system is a Four Stage RO which is based upon four separate treatment segments within one complete
water ltration system. These stages are as follows:
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 – Pre-Carbon lter, recommended change 6 months.
The second stage contains a carbon block lter. This helps ensure that chlorine and other materials that
cause bad taste and odor are greatly reduced.
Stage 3- Membrane, recommended change 2-5 years.
Stage three is the heart of the reverse osmosis system, the RO membrane. This semi-permeable membrane
will reduce salts, minerals, metals, and much more. Because the process of extracting this high quality
drinking water takes time, your RO water treatment system is equipped with a storage tank.
Stage 4- Post Carbon Filter, recommend change 12 months.
The post carbon lter is a granular activated carbon (GAC) cartridge using coconut shell carbon. This
lter provides nal polishing and ensures great tasting drinking water.
System Maintenance
Just because you can not taste it, does not mean that it is not there. Contaminants such as lead, chromium, VOC’s
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.
This is why it is important to change out your lter at the recommended intervals as indicated in this system manual.
Should you have any further questions please contact the dealer that you purchased the unit from.
With proper installation and maintenance, this system will provide you with high quality water for years to come.
All of Watts water enhancement products are rigorously tested.
NOTE: 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 end users responsibility to ensure that this system is installed according to all
local codes and regulations.

Page 3
Table of Contents
Operational Parameters................................................................................................................... 4
Contents of Reverse Osmosis System............................................................................................ 4
Installation & Startup
Tools Recommended For Installation .............................................................................................. 4
Parts Diagram ................................................................................................................................. 5
Drill a Hole for the Reverse Osmosis Faucet .................................................................................. 6
How to use Quick Connect Fittings on Your RO System ................................................................ 6
Mount the Reverse Osmosis Faucet ............................................................................................... 7
Adapt-a-Valve Installation ............................................................................................................... 7
Drain Saddle Installation.................................................................................................................. 8
Drain Saddle Tube Connection..................................................................................................... 8-9
Faucet Tube Connection - RO Water .............................................................................................. 9
Black Tube Connection - Inlet........................................................................................................ 10
Tank Valve Installation - Metal Tank............................................................................................... 10
Tank Valve Installation - Plastic Tank............................................................................................. 10
Yellow Tube Connection - RO Module to Storage Tank..................................................................11
Reverse Osmosis Module Mounting...............................................................................................11
Install the Cartridges.......................................................................................................................11
Start up Instructions....................................................................................................................... 12
Maintenance & Troubleshooting
Changing The Filter Cartridges ..................................................................................................... 13
Membrane Replacement .............................................................................................................. 13
Annual Sanitization ....................................................................................................................... 14
Check Air Pressure in the Tank ..................................................................................................... 14
Drain Line Flow Restrictor Maintenance........................................................................................ 15
Procedure for Extended Non-Use (More than 2 months).............................................................. 15
Troubleshooting ............................................................................................................................ 16
Product Technical & Warranty Information
Service Record............................................................................................................................... 17
Limited Warranty ............................................................................................................................ 18

Page 4
Installation must comply with State and local plumbing regulations. 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 using the cold water supply only.
Tools Recommended For Installation
√ 1 1/4" Diamond Tipped Hole Saw bit for faucet opening (Counter Tops/Porcelain & Stainless Sinks)
√ 1 1/4” Adjustable Wrench √ Phillips bit for electric drill
√ 1/2" Open End Wrench √ Needle Nose Pliers
√ 5/8” Open End Wrench √ Adjustable Pliers
√ Electric Drill √ Sharp Knife
√ 1/8" diamond tip bit, pilot hole √ Phillips Screw Driver
√ 1/4” drain saddle hole
Contents of the Reverse Osmosis (RO) System
Operating Temperatures: Maximum 100°F (37.8°C) Minimum 40°F (4.4°C)
Operating Pressure: Maximum 100 psi (7.0 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 Maximum 10 Grains Per Gallon *
Hardness: Recommended hardness not to exceed 10 grains per gallon, or 170 parts per million.
* 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.
Copper Tube: Reverse Osmosis water should not be run through copper tube as the purity of the
water will leach copper causing an objectional taste in water and pin holes may form in the tube.
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 100 psi then a
water pressure regulator is required. A booster pump is needed for incoming water pressure
under 40psi.
INSTALLATION & STARTUPINSTALLATION & STARTUP
1 Module 1 Parts Bag
4 Filters 1 Manual
If any of the items are missing please contact Watts prior to installing.

Page 5
QT QT QT QT
3/8”
DRAIN
SADDLE
COLD-WATER
SHUT-OFF VALVE
1/4” BLACK TUBE
TAP
TO
KITCHEN
SINK
BRINE
3/8”
YELLOW
TUBE
3/8”
BLUE TUBE
3/8”
BLACK TUBE
STAGE 1
SEDIMENT
FILTER
STAGE 2
CARBON
PRE-FILTER
STAGE 3
REVERSE
OSMOSIS
MEMBRANE
STAGE4:
POST-CARBON
FILTER
FAUCET
ADAPT
-A-
VALVE
ASOV
IN OUT
PERMEATE
FILTER
LID
FILTER
LID
R.O.
FILTER
LID
FILTER
LID
FLOW RESTRICTOR
(IN DRAIN ELBOW)
TANK
BALL VALVE
PLASTIC
STORAGE
TANK
OPTION
METAL
STORAGE TANK
OPTION
TANK
BALL VALVE
8AIRGAP FAUCET OPTION
(FAUCET SOLD SEPARATELY)
NON-AIRGAP FAUCET OPTION
(FAUCET SOLD SEPARATELY)
1/4”
DRAIN
SADDLE
BRINE
11
1 2 3 4
7
7
6
5
12
10
9
Parts Diagram
ITEM QTY PART # DESCRIPTION
1 1 WQTSC-10 SEDIMENT FILTER
2 1 WQTCBC-10 PRE-CARBON FILTER
3 1 WQTM50-10 MEMBRANE FILTER 50 GPD
4 1 WQTGAC-10 POST CARBON FILTER
5 1 FRO-132-WH 4 GALLON WHITE STEEL TANK
6 1 ROPRO4-W RO ROPRO STORAGE TANK, WHITE PLASTIC
7 1 PPSV501222W VALVE BALL 3/8” x 1/4” FEMALE ELBOW
8 1 F560080 RO ADAPT-A-VALVE KIT
9 1 WE-CU138B-Q SADDLE DRAIN 3/8” QC
10 1 WE-CU114B-Q SADDLE DRAIN 1/4” QC
11 1 F134003 AUTOMATIC SHUT OFF VALVE (ASOV)
12 1 F122051 FLOW RESTRICTOR (IN DRAIN ELBOW)
FAUCET OPTIONS (SOLD SEPARATELY)
- 1 WTMFAG-C FAUCET - TOP MOUNT, CHROME (AIRGAP)
- 1 FU-WDF-103-3NSF FAUCET - LONG REACH, CHROME (NON-AIRGAP)
- 1 FU-AGLR.C/3 FAUCET - LONG REACH, CHROME (AIRGAP)

Page 6
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.
Step 2. Using a variable speed drill set on the slowest speed, drill a 1/8“ pilot 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).
Step 3. Using a 1 ¼” diamond tip 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 hole saw cool during cutting.
Step 4. After drilling, remove all sharp edges and make sure the surroundings
of the sink are cooled before mounting the faucet.
Counter Top / Porcelain & Stainless Steel Sink
Note: Most sinks are pre drilled with 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. Watts accepts no responsibility for damage resulting from the installation
of faucet. Diamond tip bit recommended.
Marble Counter-top
We recommend contacting a qualied contractor for drilling a hole in a marble counter-top.
Drill a Hole for the Reverse Osmosis Faucet
How to use the Quick Connect Fittings
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.
It is essential that the outside diameter be free of score
marks and that burrs and sharp edges be removed before
inserting into tting.
Fitting grips before it seals. Ensure tube is pushed into
the tube stop.
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.
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 col-
lect squarely against face of tting. With the collet held
in this position, the tube can be removed. The tting can
then be reused.

Page 7
Step 5. Turn off the cold water supply to the faucet by turning the angle stop valve completely off.
Open cold water sink faucet to relieve pressure.
Step 6. Choosing the conguration that ts your plumbing, attach the adapt-a-valve as illustrated in
the four photos above.
Adapt-a-Valve Installation
Do not use Teon tape with the Adapt-a-Valve.WARNING:
Caution: Water supply line to the system must be from the cold water supply line only.
Hot water will severely damage your system.
3/8” Conguration
(With Brass Fittings)
* Insert White Washer
1/2” Conguration
(Without Brass
Fittings)
*White
Washer
Hot
Supply
Cold
Supply
Hot
Supply
Cold
Supply
Verify contents prior to installation:
( 1 ) - Plastic Adapt-a-Valve with black collet
( 1 ) - Brass Adapter no washer
( 1 ) - Brass Adapter with black washer
( 1 ) - White rubber washer
Make sure that the black collet is installed in to the 1/4” opening on the Adapt-a-valve.
Don’t forget to install the white compression washer with the 3/8” conguration.
Brass adapter (A) does not need to be tightened with a wrench, only nger tight.
Black
Collet
A
TIPS:
A
White
Washer
Mount the Reverse Osmosis Faucet
Refer to installation instructions found on faucet box.
If installing an Air-Gap faucet, connect tubes to the faucet prior to mounting:
1/4” Red Tube - Air Gap Feed - Off Center Fitting
3/8” Black Tube - Air Gap Drain - Off Center Fitting
3/8” Blue Tube - Drinking Water - Center Connection
If installing a Non Air-Gap faucet connect:
3/8” Blue Tube - Drinking Water - Center Connection

Page 8
Drain Saddle Installation - Fits standard 1 ¼” – 1 ½” drain pipes
Caution: Do not install this drain saddle near a garbage disposal.
It must be above the disposal or above the crossbar on a
second sink drain. Installing the drain saddle near a garbage
disposal may cause it to clog. Please also make sure the
drain saddle is mounted at least 1 1/2” above the nut of the
p-trap or cross bar from the garbage disposal
Notice: Follow all local plumbing codes for your installation.
Step 7. Determine if a 1/4” tube connection or 3/8” tube connection drain
saddle should be installed. For air-gap RO faucets (3 tubes) use
the larger 3/8” tube connection drain saddle. For non air-gap RO
faucets (1 tube) use 1/4” tube connection drain saddle.
Step 8. Mark the location for the opening on the drain pipe then drill a:
3/8” opening in the drain for 3/8” drain saddles
OR 1/4” opening in the drain for 1/4” drain saddles
Step 9. Peel and stick the foam gasket onto the drain saddle
Step 10. Attach the drain saddle to the pipe using the bolts.
Caution: Do not over-tighten bolts. This may crack the drain saddle
Step 11. Check that the opening in the drain saddle is lined up with the
opening in the drain pipe by feeding a small screw driver through
the opening.
P-Trap
Elbow
1.5”
Step 12
( A ) 1/4” Tube Fitting Drain Saddle
Drain Saddle Tube Connection
Push the 1/4” red drain tube open end into the 1/4” quick
connect tting on the drain saddle making sure it is pushed all
the way to the tube stop. Continue to step 14 on the next page.
Choose your conguration below ( A - 1/4” or B - 3/8” ):
Step 13A-1 In the parts bag, locate the 1/4” red tube. Connect the tube
to the open quick connect tting on the top of the RO Module
labeled “Drain” making sure the tube is pushed in all the way
to the tube stop.
Step 13A-2

Page 9
Note: On 3/8” drain saddles, the black 3/8” drain tube must be as
SHORT and STRAIGHT as possible. Make sure there is a
downward slope with no low spots between this line and the
drain. Leaving this line too long or with low spots can lead to
water building up and leaking out of the air gap of the faucet.
Locate the 3/8” drain tube attached to the RO faucet. Measure
the tube from the faucet to the drain saddle on the drain pipe and
make a straight cut to the correct length. Push the open end of the
3/8” black tube into the 3/8” drain saddle. Make sure it is pushed
in all the way to the tube stop.
( B ) 3/8” Tube Fitting Drain Saddle
Locate the red 1/4” drain tube attached to the RO faucet.
Connect the open end of tube to the quick connect tting on
the top of the RO Module labeled “Drain” making sure the tube
is pushed in all the way to the tube stop.
Step 13B-1
Step 13B-2
Locate the blue 3/8” tube attached to the RO Faucet. Connect
the open end of the blue 3/8” tube to the quick connect tting
on the right side of the RO Module labeled “FAUCET” making
sure the tube is pushed in all the way to the tube stop. Continue
to step 15 on the next page.
Step 14
Faucet Tube Connection

Page 10
Black 1/4” Tube Connection - Inlet Water
Step 15
Insert the other open end of the black 1/4” tube into the open 1/4”
quick connect tting on the plastic adapt-a-valve making sure the
tube is pushed in all the way to the tube stop.
Step 16
Black Tube
Adapt-a-Valve
In the parts bag, locate the 1/4” black tube. Connect the tube to
the quick connect tting on the left side of the RO Module labeled
“In” making sure the tube is pushed in all the way to the tube stop.
Thread the plastic valve onto the tank tting. Do not over tighten
or the valve could crack.
Step 17
Step 18
Teon 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.
Tank Valve Installation - Metal Tank
Tank Valve Installation - Plastic Tank
Thread the plastic valve onto the tank tting. Do not over tighten
or the valve could crack.
Step 19
Step 20
Make sure the O-ring is located at the bottom of the recess for
the tank connection.
DO NOT use Teon tape on plastic tank.
Note:

Page 11
Reverse Osmosis Module Mounting
Step 23 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 13.5” apart and 16” from the bottom
of the cabinet.
Step 24 Identify each cartridge and the proper location on the system by
matching the description on the lter head and lter cartridge.
Install the Cartridges
Step 25 Insert each cartridge with a 1/4 turn in the clock wise direction.
The cartridge is installed properly when the label is facing
toward the front of the unit.
Connect the open end of the yellow 3/8” tube into the 3/8” quick
connect tting on the tank ball valve making sure the tube is
pushed in all the way to the tube stop.
Step 22
Yellow Tube Connection - RO Module to Storage Tank
Step 21 In the parts bag, locate the 3/8” yellow tube. Find the connection
elbow labeled “Tank”, then connect the tube to the elbow from
beneath the metal bracket. Make sure the tube is pushed in all
the way to the tube stop.

Page 12
Start up Instructions
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 storage tank must be
allowed to ll up fully in order for the ice maker system to work properly.
After the storage tank has lled (the water trickling to the drain has stopped), 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.
Open the RO faucet and leave it open until water begins to trickle out (this may take a few
minutes and the water will come out slowly).
Step 4
Turn on the incoming cold water at the angle stop valve and the
Adapt-a-Valve. Check the system for leaks and tighten any ttings
as necessary. (Check frequently over the next 24 hours to ensure
no leaks are present).
Step 3
Step 2
Note:
Step 1
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.
Flushing of the tank 3 times is only necessary during the initial startup and after replacing the
membrane.
During the ll period you may hear water trickling which is a normal occurrence.
Note:
Note:
Congratulations!
You have completed the installation of your new Reverse Osmosis system.
Please Follow the Startup Instructions.
The ushing process should take about a day to complete.
ON

Page 13
Place a towel under the RO module to catch any excess water that
may drip out from the lters during the changeover.
Step 1
Your RO module is equipped with valved heads which will automatically turn off the water
supply to each lter when the lter is released, thus you do not need to turn off the incoming
water supply at the Adapt-a-Valve. The RO faucet must be off when filters are replaced.
Step 2
To install a lter cartridge: Remove the seal cap and insert the
cartridge into the valved head with the label facing to the left
(9 o’clock position) rotating it clockwise 1/4 turn.
Step 3
To remove a lter cartridge: Grasp the cartridge and rotate it
1/4 turn counter clockwise to remove.
Changing The Filter Cartridges
Membrane Replacement (2 - 5 Years)
√ One Membrane (P/N: WQTCM50-10)Replace:
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%.
This reverse osmosis system contains a replaceable component (the RO membrane) which is critical to the ef-
ciency of the system. Replacement of this reverse osmosis membrane should be with one of identical speci-
cations as dened by Watts Premier to assure the same efciency and contaminant reduction performance.
Annual Maintenance -(Sanitization Recommended See Page 14)
√ One sediment lter (P/N: WQTSC-10)
√ One carbon pre-lter (P/N: WQTCBC-10)
√ One carbon post-lter (P/N: WQTCGAC-10)
Replace:
√ One sediment lter (P/N: WQTSC-10)
√ One carbon pre-lter (P/N: WQTCBC-10)
Replace:
6 Month System Maintenance
Tip: This is a good time to check the air pressure in your storage
tank. For instructions please see page 14.
Flush rst tank full after completing the annual maintenance.
Note:
MAINTENANCE & TROUBLESHOOTINGMAINTENANCE & TROUBLESHOOTING

Page 14
Annual Sanitization
Using a clean eye dropper insert ½ teaspoon of hydrogen peroxide
or common household bleach into the yellow tube. This will ow into
the tank once water is turned back on to unit. Reattach yellow tube
to the ball valve. Follow start up procedure and drain two full tanks of
water. Replace Post Carbon Filter.
Turn off the water supply to your RO system at the adapt-a-valve and
open the RO faucet to drain the storage tank.
Sanitization procedure must be performed before a lter change.
Note:
Step 1
Step 3
Step 2 Disconnect the yellow tube from the ball valve on the storage tank
(see page 6 for quick connect tting use instructions).
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)
Check Air Pressure in the Tank
Important:
Step 3
Check air pressure only when tank is empty of water!
Step 1 Turn off the incoming water supply to the RO.
Open the RO Faucet and allow water to drain from the tank until
it is completely empty.
Step 2
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.
Tip: 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.
Step 4 Follow startup procedure on page 12.

Page 15
Procedure for Extended Non-Use (More than 2 months)
Turn off the water supply to your RO system at the adapt-a-valve and open the RO faucet to
drain the storage tank. Once the storage tank is empty, remove all lter cartridges (order not
important), place them into a sealed plastic bag and store in your refrigerator.
To Restart System:
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 the tank has been allowed
to completely ll.
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. The second tank
can be used for drinking.
Open the RO faucet and leave it open until water begins to trickle out (it will come out slowly).
Step 6
Turn on water supply to the system at the Adapt-a-Valve.
(Check frequently over the next 24 hours to ensure no leaks are present).
Step 5
Step 4
Note:
Step 2
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.
Reinstall all lters on to the RO unit. Filters are color coded to match the lter heads they
twist in to. Refer to page 13 step three for cartridge installation procedure.
Step 1
Drain Line Flow Restrictor Maintenance
Step 1 Turn off the incoming water supply at the adapta valve.
Step 2 Remove the red tubing from the quick connect tting.
Step 3 Remove the tting from the back of the RO unit.
Step 4 Remove, inspect and clean the orice in the ow restrictor.
Step 5 Reinstall the ow restrictor into the end of the tting.
Step 6 Reinstall the tting to the back of the RO unit.
Step 7 Reinstall the red tubing to the tting.
Step 8 Turn on the water supply at the adapt-a-valve.
Please refer to parts list diagram on page 5 (Item 14) for ow restrictor location.

Page 16
TROUBLE SHOOTING
Problem Cause Solution
1. Low/Slow Production Low Water Pressure Ensure 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 feed water
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.
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.
Too 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. 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.

Page 17
SERVICE RECORD & WARRANTY INFORMATIONSERVICE RECORD & WARRANTY INFORMATION
Service Record
Date of Purchase:__________ Date of Install:___________ Installed by:__________________
Serial No. _____________________
Date 1st stage
Sediment
(6 months)
2nd stage
Carbon
(6 months)
4th stage
Carbon
(1 year)
3rd stage
Membrane
(2-5 years)
NOTES:

IOM-WQT4RO11-50 WP299327 2150 EDP# WP299327 © 2021 Watts
Limited Warranty
This Reverse Osmosis System is warranted against defects in material and workmanship for a period of
one year from the date of installation, not to exceed 2 years from the date of manufacture. Expendable
items such as lter cartridges and membranes are not covered by this warranty.
How to obtain Warranty Service: Contact the dealer that you purchased the system from. Watts will work
in conjunction with our dealer to repair or replace at our discretion any unit that is determined to be defec-
tive. No returns will be accepted with out the proper return authorization number.
What this warranty does not cover: This warranty does not cover defects resulting from improper installa-
tion, from abuse, misuse, misapplication, improper maintenance, neglect, alteration, accidents, casualties,
re, ood, freezing, environmental factors, water pressure spikes or other such acts of God.
Return shipping charges are not included in this warranty and are the responsibility of the end user.
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 100 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 microbiologically unsafe or of unknown quality without adequate dis-
infection before or after the system.
This warranty does not cover any equipment that is relocated from the site of its original 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 RE-
SPONSIBLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING WATER DAM-
AGE, TRAVEL EXPENSE, TELEPHONE CHARGES, LOSS OF REVENUE, LOSS OF TIME, INCONVE-
NIENCE, 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 RESPON-
SIBILITIES REGARDING THIS EQUIPMENT.
OTHER CONDITIONS:
If Watts chooses to replace the equipment, it may be replace with reconditioned equipment. Parts used in
repairing or replacing the equipment will be warranted for 90 days from the date the equipment is re-
turned to you or for the remainder of the original warranty period, whichever is longer. This warranty is not
assignable or transferable.
WARNING: This product contains chemicals known to the State of California to cause cancer and birth
defects or other reproductive harm. For more information: www.watts.com/prop65