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: