Watts WQC4 RO SERIES User manual

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INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Refer to enclosed warranty and operating parameters to ensure proper use with your water supply.
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SERIES
WQC4 RO
Warning
Please read carefully before proceeding with installation. Your failure to follow the instructions or
operating parameters may lead to the product’s failure and possible damage to property.
Manual Edition: 4/12/07
DISTRIBUTED BY:

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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 flushed from the system.
Your system is a Four Stage RO which is based upon four separate treatment segments within one complete water filtration
system. These stages are as follows:
Stage 1 – Sediment filter, recommended change 6 months.
The first stage of your RO system is a five micron sediment filter 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 filter, recommended change 6 months.
The second stage contains a carbon block filter. This helps ensure that chlorine and other materials that cause bad
taste and odor are greatly reduced.
Stage 3- Membrane, recommended change 1-2 years.
Stage three is the heart of the reverse osmosis system, the RO membrane. This semi-permeable membrane will take
out salts, minerals, metals, bacteria, virsus, cysts, 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 filter is a granular activated carbon (GAC) cartridge using coconut shell carbon. This filter
provides final polishing and assures good 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 filter elements, other bad tastes and odors will
be apparent in your drinking water.
This is why it is important to change out your filter 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.
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.

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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.
Table of Contents
Operational Parameters ........................................................................................................................ 4
Contents of Reverse Osmosis System.................................................................................................. 4
Tools Recommended For Installation .................................................................................................... 4
Drill a Hole for the Faucet in a Porcelain Sink....................................................................................... 5
Punch a Hole for the Faucet in a Stainless Steel Sink ..........................................................................5
Faucet Installation ................................................................................................................................. 6
Adapta Valve Installation ...................................................................................................................... 7
Reverse Osmosis Module Mounting...................................................................................................... 7
Air Gap/Non Air Gap Installation............................................................................................................ 8
Drain Saddle Installation........................................................................................................................ 9
Tank Valve Installation ........................................................................................................................... 9
White Tube Connection ....................................................................................................................... 10
3/8” Black Tube Connection........................................................................................... ......................11
How to Use Quick Connect Fittings......................................................................................................11
Red Tube Connection (From Faucet).................................................................................................. 12
Blue Tube Connection (From Faucet) ................................................................................................. 12
Start Up Instructions............................................................................................................................ 12
Cartridge Replacement........................................................................................................................ 13
Annual Maintenance ........................................................................................................................... 14
Procedure for Extended Non-Use ....................................................................................................... 15
Trouble Shooting ................................................................................................................................. 16
Service Record .................................................................................................................................... 17
Warranty Information ........................................................................................................................... 18
Unit Drawing ...................................................................................................................................... 19

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Hardness: Recommended hardness should not exceed 10 grains per gallon, or 170 ppm. 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.)
1 Tank
1 RO System
1 Parts Bag
1 Faucet Bag
If any of the items are missing please contact your
dealer.
Tools Recommended For Installation
Contents of Reverse Osmosis (RO) System
Note: Reverse Osmosis water should not be run through copper tubing as the purity of the water
will leach copper and cause an objectionable taste in water and may cause damage to copper
tubing. Watts supplies specialty medias that can be used if copper tubing is down stream of
the RO. Be sure to follow any state or local regulations.
Operational Parameters
Note: The operating pressure in your home should be tested over a 24 hour period to attain the
maximum pressure. If incoming pressure is above 85 psi a pressure regulator is recommended and
if over 100 psi then a pressure regulator is required.
1 Manual and Warranty Card
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
1 1/4” Hole Saw Bit for Faucet opening and/ or
Round Knock out Punch for Stainless Sinks 1 1/4”
Adjustable Wrench
Sharp Knife
1/2”- 13/16” Open End Wrenches
Phillips Screw Driver
Needle Nose Pliers- Adjustable Pliers
Electric Drill

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Make sure the surroundings of the sink are cooled before mounting the
faucet to the sink after drilling. Remove all sharp edges.
Step 3
Step 4
Determine desired location for the faucet on your sink and place a piece
of masking tape on location where the hole is to be drilled. Mark the
center of the hole on the tape.
Step 1
Using a variable speed drill on the slowest speed, drill a
1
/ 8 “ pilot hole
through both porcelain and metal casing of sink at the center of the
desired location. (If drill bit gets hot it may cause the porcelain to crack
or chip), use lubricating oil or liquid soap to keep cool.
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
hole saw cool during cutting.
Step 2
Drill a Hole for the Faucet in a Porcelain Sink
Punch a Hole for the Faucet in a Stainless Steel Sink
Drill a ¼” pilot hole. Use a
1
/ 2 ” Hole Punch and an adjustable wrench to
punch the hole in the sink. Change to the 1 ¼” Hole Punch to enlarge
the hole.
Step 5
The faucet can now be installed.
If mounting faucet to a Stainless Steel Sink you will need a 1 ¼” 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.
Note:
Note: Some sinks are predrilled 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. Watts accepts no responsibility for damage resulting from the installation of
faucet.

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Gather and identify the faucet pieces.
Remove faucet base & faucet spout from their respective
plastic bags. From above the sink, feed the faucet tubing &
toggle bolt down through the 1¼” mounting hole in the sink.
Ensure that the soft rubber gasket is uniformly positioned in
between the base and the top of the sink.
Align the faucet base so that the handle is on the right side and
the base is sitting flush on the sink top. Turn the handle down
(towards you) to the “ON” position to reveal the tightening
screw (located where the spout will be inserted). Using a
phillips head screwdriver, turn the screw clockwise until the
toggle bolt secures the faucet base snug onto the sink top,
do not over torque toggle bolt (5lb. in. max)
Once the faucet base is securely fastened to the sink top,
insert the faucet spout into the faucet base until it is fully
seated. Turn the handle up (away from you) to the “OFF”
position.
Completion of faucet installation (tubing connections) will be
done later in this manual. Refer to the Black Tube Connection
(page 10), Red Tube Connection (page 11), and Blue Tube
Connection (page 11) sections of this manual.
WATTS Chrome
(Top Mount) Faucet Installation
Step 6
Step 7
Step 8
Step 9
Minimum Maximum
Mounting Hole Size 1.00” 1.25”
Torque on Toggle Bolt 5lb.in. (max)
Watts Top Mount Faucet
Other Faucet Style Installation

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Adapta Valve Installation
Locate the cold water supply under the sink.
Reverse Osmosis Module Mounting
Step 13 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 a Phillips screwdriver, screw them into the cabinet
wall 10 1/2” apart and 16” from the bottom of the cabinet.
Step 10
Step 12 Attach adapta valve as illustrated in the three photos above, choosing the configuration that
fits your plumbing. (When attaching the adapta valve to straight pipe threads, use Teflon
tape on the threads). The white tube from inlet side of RO module will be cut to length and
attached later in the installation.
Do not cut any RO system tubes at this time.Note:
Caution: Water supply line to the system must be from the cold water supply line only. Hot
water will severely damage your system.
Configuration for 3/8”
compression fittings
Configuration for 1/2”
compression fittings
Hot
Supply
Cold
Supply
Turn off the cold water supply to the faucet by turning the angle stop valve completely off.Step 11

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Non Air Gap Faucet Installation
Air Gap Faucet Installation

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Thread the plastic valve onto the tank fitting. Do not over tighten
or the valve could crack.
Step 17
Step 18
Make sure the O-Ring is located at the bottom of recess for the tank
connection.
Tank Valve Installation - (Metal Tanks)
Do not let the tape cover the opening
in the fitting.
*Note:
Drain Saddle fits standard 1 ¼” – 1 ½” drain pipes
Drain Saddle Installation
Step 14
Step 15
Step 16 Drill a ¼” hole through the drain pipe at least 1 1/2” above the nut
of the P-trap to allow for the removal of the P-trap if necessary.
Assemble the drain saddle around the drain pipe. Position the drain
saddle over the drilled hole in pipe. Insert screw driver into the
opening of the drain saddle and align with drilled hole in drain pipe.
Using Phillips screw driver tighten screws evenly and securely on
both sides of the drain saddle. Attach black compression nut, but
do not tighten at this time. The black tubing will be installed later.
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
backing and stick to the drain saddle as shown.
1 Black compression nut 1 Semicircle bracket with opening
2 Screws 1 Foam washer
2 Nuts for screws 1 Semicircle bracket
1 3/8 or 1/4” Tube Insert
Gather the pieces of the drain saddle
Caution: Do not over tighten the screws. It may crack the drain saddle.
If you have a garbage disposal, do not install the drain line near it. Installation
of the drain line must be either above the disposal, or if a second sink drain is
available, install it above the cross bar on the second sink. Installation of the
drain line near a garbage disposal may cause the drain line to plug.
Caution:
Tank Valve Installation - (Plastics Tanks)
Step 17
Wrap 3 to 4 turns of Teflon tape clockwise around the male pipe threads
coming out of the top of the tank.
Step 18 Thread the plastic valve onto the tank fitting. Do not over tighten or
the valve could crack.

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Connect White Tube from TANK Port on RO Module to the Tank
Position tank in desired location. Stand it upright or lay it on its
side (using the black plastic stand). Measure the white tube from
the RO module port marked TANK over to the tank and cut it to
desired length.
Insert the white 1/4” tube through tank valve compression nut.
Place 1/4” plastic insert in tubing. Push tubing into valve. Hand
tighten the compression nut securely, and add 1/4 turn with a
wrench.
Step 22
White Tube Connection
Step 19
Step 21
Step 20
Adapta Valve
Remove a brass nut, plastic sleeve and brass insert from the parts
bag. Place nut on the tube first, then the sleeve (Small taper end
of sleeve must point to the end of tube) and then insert the brass
insert into the end of the tube.
Insert the white tube into the ¼” opening on the adapta valve until
it stops. Slide nut and sleeve down and thread onto the male pipe
threads. Use a ½” wrench to securely tighten. Run the tube to
the inlet on the back of the RO system. Leave enough tube so it
is not kinked and cut the tube to desired length.
Note: The white tube will be cut into two pieces. One for the
inlet and one for the tank.
Connect White Tube from Adapta Valve to IN Port on RO
module