Watts Premier WP-5 General instructions

Page 1
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Refer to enclosed warranty for operating parameters to ensure proper use with your water supply.
Watts Premier, Inc. 1725 W. Williams Drive C-20 Phoenix, AZ 85027
Phone: [phone] www.wattspremier.com Fax: [phone]
Save manual for future reference
MODEL
WP-5 WP5-50 KP-5 B-RO5M-50
Warning
Please read carefully before proceeding with installation. Your failure to follow any attached instructions
or operating parameters may lead to the products failure and possible damage to property.
System Tested and certified by NSF International against ANSI/NSF
Standard 58 for the reduction of the claims specified on the
performance data sheet.
Manual Edition: 8/21/07
P/N 199349

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Thank you for your purchase of a state of the art Watts Premier Reverse Osmosis (RO) water treatment system. Water
quality concerns are quickly becoming more of a focus for the public. Lately 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 in
your area such as high levels of lead and copper. This Watts Premier 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 particles like clean
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 flushed from the system. This reverse osmosis system also
utilizes carbon block filtration technology, and can therefore provide a higher quality drinking water than carbon filtration
systems alone.
Your system is a five stage RO which is based upon five separate treatment segments within the 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 and 3 – Carbon filters, recommended change 6 months.*
The second and third stages each contain a 5 micron carbon block filter. This helps ensure that chlorine and other
materials that cause bad taste and odor are greatly reduced.
Stage 4- Membrane, recommended change 2-5 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 heavy metals such as arsenic, copper, and lead, as well as Cysts, such as
Giardia and cryptosporidium. Because the process of making this high quality drinking water takes time, your RO
water treatment system is equipped with a storage tank.
Stage 5- Carbon in-line filter, recommend change 6 - 12 months.
The final stage is an in-line granular activated carbon (GAC) filter. This filter is used after the water storage
tank, and is used as a final polishing filter.
System Maintenance
Just because you can not taste it, does not mean that it is not there. Contaminants such as lead, chromium and arsenic (to
name a few) are undetectable to the taste. Additionally, over time if you do not replace the filter element, 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. When
replacing the filter elements, pay special attention to any cleaning instructions. Should you have any further questions
please refer to our website at www.wattspremier.com or call our customer service dept. at 1-800-752-5582.
*KP-5 R.O. unit is equipped with annual filters, therefore require only one annual filter change.

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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 Premier’s water enhancement products are rigorously tested by independent
laboratories for safety and reliability. If you have any questions or concerns, please contact our cus-
tomer service department at 1-800-752-5582 (outside USA 623-931-1977) or refer to our on-line trouble
shooting at www.wattspremier.com.
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
Wave Faucet Installation ....................................................................................................................... 6
AG-SS with TDS Monitor Monitor Faucet Installation ............................................................................ 7
AG-SS with Monitor Faucet Installation ................................................................................................. 8
Adapta Valve Installation ...................................................................................................................... 9
Reverse Osmosis Module Mounting ..................................................................................................... 9
Drain Saddle Installation ..................................................................................................................... 10
Tank Elbow Installation ........................................................................................................................ 10
Blue Tube Connection ..........................................................................................................................11
Green Tube Connection .......................................................................................................................11
3/8” Black Tube Connection ................................................................................................................ 12
How to use Quick Connect Fittings............................................................................................. ........ 12
Red Tube Connection .......................................................................................................................... 13
Final Filter Installation ......................................................................................................................... 13
Start up Instructions ............................................................................................................................ 14
6 Month Maintenance .......................................................................................................................... 15
Annual Maintenance ............................................................................................................................ 16
Membrane Replacement .................................................................................................................... 16
Cleaning flow Restrictor ...................................................................................................................... 17
Checking Air Pressure in the Tank ...................................................................................................... 18
Procedure for extended Non-Use ....................................................................................................... 18
Trouble Shooting .� 19
Arsenic Fact Sheet. ............................................................................................................................. 20
California Certification ......................................................................................................................... 21
Performance Data Sheet ..................................................................................................................... 22
One Piece Manifold Drawing ............................................................................................................... 24
Parts List ............� 24
Other Products ..� 25
Warranty Registration .......................................................................................................................... 28
Service Record ...� 30
Limited Warranty � 32

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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 will be shortened. (Addition of a water
softener may lengthen the membrane life.)
1 Tank – White
1 Module – White
1 Parts Bag – With a Final Filter
1 Faucet Bag
If any of the items are missing please contact Premier prior
to installing.
Tools Recommended For Installation
√ 1 1/4" Hole Saw Bit for Faucet opening
√ Round Knock out Punch for Stainless Sinks 1 ¼”
√ Adjustable Wrench
√ Sharp Knife
√ 1 / 2" - 13/16” Open End Wrenches
√ Phillips Screw Driver
√ Needle Nose Pliers – Adjustable Pliers
√ Electric Drill
√ 1/8", 1/4" & 3/8" Drill Bits
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 objectional taste in water and may cause pin holes. 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 it is above 85 psi a pressure regulator is recommended and if over 100 psi
then a pressure regulator is required. Should you need a gauge to check your pressure, see page 26
(item no. 261003).
Operating Temperatures: Maximum 100°F (37.8°C) Minimum 40°F (4.4°C)
Operating Pressure: Maximum 85 psi (6.0 kg/cm2) Minimum 40 psi (2.80 kg/cm2)
pH Parameters: Maximum 11 Minimum 2
Iron: Maximum 0.2 ppm
TDS (Total Dissolved Solids): < 1800 ppm
Turbidity: < 5NTU
1 Manual and Warranty Card

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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 1/4” 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: Most 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. Premier accepts no responsibility for damage resulting from the installation of faucet.

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Gather and identify the faucet pieces.
WATTS Premier (Top Mount) Monitor Faucet Installation
Step 2
Step 3
Step 4
Step 5
Step 6
Note:
Tubing Connections
The BLUE Tube from the faucet should be connected
to the clean water source, such as from the RO system,
clean water storage tank, or from the final filter. This is
the line that supplies the faucet with clean water when the
faucet is turned to the “ON” position. You may need to use
a 3/8” to 1/4” union (Watts p/n: 125037) to attach this line.
This is also the only line to connect if your
faucet does not have an air gap.
The RED Tube from the faucet should be connected to the
waste water output port on the RO system.
The BLACK Tube from the faucet should be connected to the drain. This is a gravity fed line, if there is any bend or dip in the tube the
rinse water will not flow into the drain properly. Water may back up and come out the air gap hole in the back of the faucet base.
Check all connections for any signs of leaking over a 24 hour period.
Step 7
Watts Premier
1-800-752-5582 (USA only)
1725 W.Williams Drive C-20
623-931-1977
Phoenix, AZ 85027
[email protected]
Step 1
Minimum Maximum
Mounting Hole Size 1.00” 1.25”
Torque on Toggle Bolt 5lb.in. (max)
Remove the faucet battery from the plastic bag. Locate the faucet battery compartment drawer on the base of the faucet. Using a small
screwd�
drawer.
NOTE: The + side of the battery faces up. The compartment drawer will not slide in if the battery is installed upside down.
Once the battery is in place, slide the battery compartment drawer back into the base until it is flush.
When the battery is first installed, both the red and green lights will flash to indicate that both lights are functional. Thereafter, it will flash
green only when the faucet handle is turned to the “ON” position. When your system is ready to be serviced (approximately six months)
you will see the light flash red when the handle is turned to the “ON” position. Refer to the Six Month Maintenance section of your
system’s manual for filter replacement.
NOTE: If your water usage is high the red light may activate sooner than six months indicating the need for filter replacement.
Faucet Battery Installation
Watts Monitor Faucet
P/N: 116074 (Chrome Monitor with Air Gap)
P/N: 116075 (Chrome Monitor)
Remove faucet base & faucet spout from their respective
plastic bags. From above the sink, feed the faucet tubing &
toggle bolt down through the 1.00” to 1.25” 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.
Step 8
This faucet provides an electronic monitor that will tell you when it is time to replace the filters in your water treatment device. The light
indicator will be green for the life of the filter, turning red once the life of the filter has been reached. This can occur after six months of
use, or sooner for heavy water usage. To reset the electronic monitor during replacement of filters, simply slide out the battery from the
faucet and reinsert. The battery life is expected to last one year, however, for heavy use the battery may need to be replaced sooner. For
replacement, look for battery number CR2354 (Watts p/n:116082) which is available at your local battery store or contact Watts Premier at
800-752-7782. You can also order online at www.wattspremier.com.

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AG-SS with TDS Monitor Faucet Installation
Step 6
Step 7
Remove the stem nut and the tubing guide from the faucet.
Make sure the soft rubber gasket remains, so it will be on top
of the counter when installed. From above the sink, feed the
tubing and faucet stem down through the 1¼ inch mounting
hole in the sink.
From below the sink, slide the tubing guide up the threaded
stem and follow it with the mounting nut, turning the nut
clockwise until fully tightened.
Insert the blue tubing (part# 610113), into the end of the
threaded stem. Make sure to push in firmly to ensure the
tubing is locked in place. (NOTE: this tubing will also be used
for the final filter installation page 13)
Refer to Black Tube Connection and Red Tube
Connection steps on pages 12 & 13 of this manual to
complete the faucet installation.
Remove the spout from the top of the faucet by pulling it
straight upward. Remove the faucet knob by pinching the
two locking tabs inward and then pulling upward on the knob
while the tabs are pinched inward. Push the coin cell battery
into the battery holder behind the circuit board. NOTE: the +
side of the battery goes against the gold metal bracket.
When the battery is iinstalled, the red and green indicator
lights will go through a flashing sequence, followed by
only the green light flashing. At this time, make your TDS
selection on the DIP Switch, only one switch is to be pushed
up. Refer to the chart below to determine which switch you
want to push up.
Note:
Note: If using the AG-SS TDS Monitor Air Gap Faucet , a 1 1/4” hole will be
required.
Step 8
Step 9
Note:
Replace the knob by centering it over the faucet and aligning the trough on the
inside of the faucet knob with the valve lever. Lower the knob making sure the
valve lever slides into the trough, making sure the knob top hole is centered
over the locking tabs. Push the knob all the way down until it locks in place.
Push the spout back into the top of the faucet so that it is fully seated and
push the frosted deflector down until fully seated. You may have to rotate the
deflector until it is in position to be fully seated.
After completing the installation of your RO system, you should see the
green light flash at the base of the faucet while water is flowing through the
faucet (the red light may flash when system is first turned on, this will
turn green following the initial tank flush).
When the system is ready to be serviced (six to 12 months) you will see the
flashing light switch from green to red, indicating it is time to replace your
filter cartridge(s).
Step 10
1 - 30 ppm 5 - 150 ppm
2 - 60 ppm 6 - 200 ppm
3 - 90 ppm 7 - 250 ppm
4 - 120 ppm 8 - 300 ppm
ON
1 2 3 4 5 6 7 8
SWITCH SELECTION FOR TDS

Page 8
AG-SS with Monitor Faucet Installation - Part# 116061
Step 6
Step 7
Gather and identify the faucet pieces.
Remove faucet and small parts from plastic bag.
Slip the gasket over the threaded stem to the faucet
flange. From above the sink, feed the tubing and faucet
stem down through the 1¼ inch mounting hole in the
sink.
From below the sink, slide the tubing guide up the
threaded stem and follow it with the mounting nut, turning
the nut clockwise until fully tightened.
Insert the blue tubing (part# 610113), into the end of the
threaded stem. Push it all the way in and then pull on it
firmly to verify it is locked in place. (NOTE: this tubing will
also be used for the final filter installation page 11)
Refer to Black Tube Connection and Red Tube
Connection steps on page 11 of this manual to complete
the faucet installation.
Remove the spout from the top of the faucet by pulling it
straight upward. SEE DRAWING
Remove the faucet knob by pinching the two locking
tabs inward and then pulling upward on the knob while
the tabs are pinched inward. Push the coin cell battery
into the battery holder behind the circuit board. NOTE:
the + side of the battery goes against the gold metal
Note:
Note: If using the AG-SS Monitor Air Gap Faucet , a 1 1/4” hole will be
required.
Step 8
Step 9
Note:
Replace the knob by centering it over the faucet and aligning the trough on the
inside of the faucet knob with the valve lever. Lower the knob making sure the
valve lever slides into the trough, making sure the knob top hole is centered
over the locking tabs. Push the knob all the way down until it locks in place.
Push the spout back into the top of the faucet so that it is fully seated and
push the frosted deflector down until fully seated. You may have to rotate the
deflector until it is in position to be fully seated.
After completing the installation of your RO system, you should see the green
light flash at the base of the faucet while water is flowing through the faucet
(the red light may flash when system is first turned on, this will turn
green following the initial tank flush).
When the system is ready to be serviced (six to 12 months) you will see the
flashing light switch from green to red, indicating it is time to replace your filter
cartridge(s).
Step 10

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Adapta Valve Installation - Part# 134007
Turn off the cold water supply to the faucet by turning the angle stop valve
completely off.
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 6” apart and 16” from the bottom of the cabinet.
Step 11
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 treads.) The green
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 timeNote:
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

Page 10
Thread the plastic elbow (supplied in the parts bag) onto the
stainless steel connection on the top of tank. Tighten using an
adjustable wrench. Do not over tighten as plastic could crack.
Step 17
Step 18
Wrap (7 to 12 turns) Teflon tape clockwise around the male pipe
threads (MPT) on the Stainless Steel fitting on top of the tank.
Tank Elbow Installation - Part# 125032
Do not Teflon tape the plastic elbow threads as this may
cause leaks.
Caution:
Do not let the tape cover the opening.Note:
Drain Saddle fits standard 1 ¼” – 1 ½” drain pipes
Drain Saddle Installation - Part# 164016
Step 14
Step 15
Step 16 Drill a ¼” hole through the drain pipe at least 1 ½” 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 Philips 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
Gather the pieces of the drain saddle
Caution: Do not over tighten the screws. It may crack the drain saddle.

Page 11
Connect Blue 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 blue tube from
the RO module port marked TANK over to the tank and cut it to
desired length.
Insert the blue 3/8” tube into the compression nut as far as it
will go. Tighten the compression nut securely with a wrench.
Step 23
Step 22
Green Tube Connection
Connect the green tube from the RO module to the adapta
valve that is connected to the Angle Stop Valve. Leave
enough tube so it is not kinked and cut the tube to desired
length.
Step 19
Step 21
Step 20
Adapta Valve - Part # 134007
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 green 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.

Page 12
3/8” Black Tube Connection from faucet
Measure the black tube from faucet to the black drain
saddle and make a straight cut through tube.
Remove black plastic nut from drain saddle. Slip black tube
through black nut. Insert black tube into the opening in the
drain saddle and hand tighten the black nut, and add 1/4 turn
with a wrench.
This is a gravity fed line, if there is any bend or dip in the
tube the rinse water will not flow into the drain properly.
Water will back up and come out the air gap hole in the
back of the faucet base.
The tubing must be as SHORT and STRAIGHT as possible to the drain saddle, making a
downward slope from module to drain saddle to allow for proper drainage.
Step 25
Note:
Note:
Step 24
How to use the quick connect fittings on the RO Module
To make a connection, the tube is simply pushed into the fitting. Place a piece of tape 1/2” from end of tube
to indicate how far the tube should be inserted. The unique patented John Guest® locking system holds
the tube firmly in place without deforming it or restricting flow.
Cut the tube square. It is essential that the outside
diameter be free of score marks and that burrs and sharp
edges be removed before inserting into fitting.
Fitting grips before it seals. Ensure tube is pushed into
the tube stop.
Push the tube into the fitting, to the tube stop. The
collet (gripper) has stainless steel teeth which hold
the tube firmly 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 prac-
tice to test the system prior to leaving site and /or before
use.
To disconnect, ensure the system is depressurized be-
fore removing the tube. Push in collect squarely against
face of fitting. With the collect held in this position, the
tube can be removed. The fitting can then be reused.

Page 13
Thread the larger (3/8”) white plastic connector into the other end
of the final filter.
Step 29 Thread the smaller (1/4”) white plastic connector into the end of
the Final Filter and tighten , (flow arrow on filter points to the 1/4”
connector).
Step 30
The Final Filter and 2 white plastic connectors are in the parts
bag. (One 1/4” smaller & one 3/8” larger)
Remove the caps from the final filter.
Final Filter Installation
Step 28
Step 27
Step 26
Connect the Red Tube from Faucet to RO Module
Insert the red 1/4” tube from the faucet into the port on the
module marked DRAIN. Make sure the tube is pushed in all
the way to the tube stop.
Insert the 1/4” blue tube attached to the faucet into the outlet of
the filter and tighten plastic nut securely. The flow arrow should
be pointing toward the faucet. Insert the 3/8” blue tube attached
to the module into the 3/8” inlet white connector on the in-line
Final Filter. Tighten the white compression nuts with an
adjustable wrench.
Step 31

Page 14
Start up Instructions
Register warranty by mail, phone, or internet. Watts Premier uses this information only to
provide a filter change reminder service. Pre-filters should be changed every six months.
You may register your warranty via our website at www.wattspremier.com or call 1-800-752-
5582 (within USA only).
NOTE:
If system is connected to an Ice Maker, turn the Ice Maker off until flushing is complete and
the tank has refilled. The system should have an in-line valve installed before the Ice Maker
so it can be closed to prevent water flowing to the Ice Maker. Your tank must be allowed to
fill up in order for the unit to shut off. (If you are installing an Ice Maker Kit, tee off after the
final filter).
After the Tank has filled, open the RO Faucet to flush the Tank completely to remove
carbon particles from final filter. Repeat this step two more times. The fourth tank can be
used for drinking. Note: The flushing of the tank 3 times is only necessary during initial
installation. This should take about a day to complete.
Step 6
Open the RO faucet and leave it open until water begins to trickle out, (it will come out
slowly).
Step 5
Turn on the incoming cold water at the angle stop valve. Open the needle valve on the
brass Adapta Valve by turning counter clockwise. Check the system for leaks and tighten
any fitting as necessary. (Check frequently over the next 24 hours to ensure no leaks are
present).
Step 4
Step 3
Step 2
Step 1
Your reverse osmosis system contains replaceable treatment components that are critical
for effective contaminant reduction. Periodic inspection and following proper system
maintenance is critical for continued performance.
After water trickles out of the faucet, close RO faucet so the tank will fill with water. The
tank will take 6 to 10 hours at first to fill completely depending on the size of the
membrane, local water temperature and pressure.

Page 15
√ One 10” sediment filter (part no. 104017) √ Bucket to catch water from filter housings.
√ Two 10” carbon filters (part no. 101009)
Clean all filter housings (bowls) with a mild soap solution and rinse
with water. Check O-rings and lubricate with water soluble lubricant.
KY Jelly® , Canola oil and other water based lubricants can be used,
petroleum based lubricants (such as Vaseline®) must not be used.
For more leverage, leave RO module attached to wall of cabinet. If you
are unable to access the module you may remove it to change filters.
Starting with the closest housing, remove and empty water, then discard
filters. Continue on to the 2nd and/or 3rd Bowls.
The sediment filter has a cloth like appearance. It should be in the 1st
housing on the side with tubing connections.
6 Month System Maintenance
Turn off incoming water supply to the RO by turning the needle valve
on the adapta valve clockwise. (The green tube is connected to the
adapta valve.)
Step 1
Step 3
Step 4
Step 5
Step 6
Let system sit for 10 – 15 minutes after tank is empty to depressurize
before attempting to remove filter housings.
Open RO Faucet to allow water to drain from the tank until completely
empty. Water can be saved in a container for drinking or to rinse
system parts.
Check O-rings to make sure they are still in place.
Insert the Carbon Block filter (filter has a gasket on each end) into
the middle housing.
Step 7
Step 8 Repeat this step for 3rd housing .
Step 2
Step 9
Open RO faucet and leave open until water begins to trickle out.
Close RO faucet to allow tank to fill with water.
Caution:
Note: The KP-5 R.O. unit is equipped with annual filters, therefore require only one annual change.
Watts Premier sells a filter change kit which includes pre-filters, a final filter, connectors, and a
wrench.
Turn water on to the unit by turning the needle valve on the adapta
valve counter clock wise.
Step 10
Note: If also doing the annual maintenance at this time continue to Step 2
on page 16.

Page 16
Membrane Replacement
Membranes have a life expectancy of between 2 and 5 years, depending on the incoming water
conditions and the amount of use of the RO system.
Normally, a membrane would be replaced during a semiannual or annual filter 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. A water sample may be sent Watts Premier for a
free test or a TDS (total dissolved solids) monitor can be purchased from Watts Premier to test the
incoming and reverse osmosis water at home.
To send a water sample, using 2 clean containers put ½ cup of tap water in one container and ½ cup
of reverse osmosis water in 2nd clean container. Clearly mark each container. Watts Premier will
test the water and call or mail you the results.
Step 1
Step 2 Remove the membrane vessel on top of the unit by turning the
vessel counter clockwise to loosen.
Turn off the cold water supply and open the RO faucet to drain the
tank.
Annual sanitizing of unit is recommended. Turn off incoming water supply. Remove sedi-
ment & carbon filters from filter housing.
Open Membrane vessel and remove the membrane from the membrane vessel. Replace
empty membrane vessel onto the unit.
Leave filters out, replace the last two (of three) empty filter housings (hand tight) onto unit.
Measure & pour either 1/2 cup of 3% hydrogen peroxide or 2 tablespoons of common
household bleach into the 1st filter housing and hand tighten onto unit.
Turn on incoming water supply. Wait 1 minute for the unit to pressurize. Turn on the RO
faucet and let the water run for 30 seconds then turn off the RO faucet . Let the unit re-
pressurize for 2 minutes. Open RO faucet again and let the water run for 5 more minutes.
Turn off incoming water supply and make sure tank is completely drained. Refer to 6
months filter change to now install new filters. Make sure to insert RO membrane back into
the manifold vessel.
The Final Filter should be replaced annually. Remove white nuts at both ends of the filter
to replace the old final filter. Replace with new filter and connectors as shown on page 13.
The white nuts can be reused so they do not have to be removed from the tubes.
Note: Flow arrow on final filter must be pointing in the direction of the faucet
Turn on incoming water supply. Let tank fill for 2-3 hours. Check for leaks and drain tank
Annual Maintenance
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7

Page 17
Pull firmly on the membrane to remove from the housing and
discard.
Unwrap new membrane and lubricate the o-rings with water soluble
lubrication such as KY Jelly ® before inserting into housing. Insert
end with the two black O-rings into the cap. Twist the membrane as
you push firmly into the cap.
Step 3
Step 4
The flow restrictor plug (part no. 164015) must be cleaned each
time you change the Membrane (part no.110009.) Remove the
existing flow restrictor with a screwdriver.
Step 6
Step 8 Follow the Start Up Instructions on page 14.
Step 5 Replace the vessel onto the cap by turning clockwise. Tighten
securely.
Step 7 Wash with soap and water and rinse. Reinsert the flow restrictor
plug and tighten until the head is flush with module.
Cleaning the Flow Restrictor

Page 18
Check air pressure when tank is empty of water!
Check air pressure in the tank when you notice a decrease in
available water from the RO system.
It is recommended that you drain the tank of water, and then
pump up the RO tank in order to ensure all water is out of the
tank. Air can be added with a bicycle pump.
Once all water in the tank is purged out, check air pressure of the
tank. If you added air to the tank, it will be higher than 5 - 7 psi.
Allow air out until you have 5 - 7 psi in the tank.
Check Air Pressure in the Tank
Step 1
Note:
Step 2
Procedure extended for Non-Use
If the system will not be used for an extended period (more than 2
months), shut the system down and remove the membrane. Place
the membrane in a sealed plastic bag with a few drops of RO water
and place in your refrigerator.
For restart, follow annual sanitization procedures.

Page 19
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. Maker 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-filters Replace pre-filters.
Fouled membrane Replace membrane and clean flow 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 filter change, drain tank 1 to 2 times.
3. Water constantly Low water pressure See #1 Above
running unit will not
shut off Fouled membrane Replace membrane
High water pressure Check incoming water pressure to make sure it does not
exceed 100 psi. A presser relief valve may be necessary.
High air pressure in tank Empty storage tank of water. Set tank air pressure to 5
psi. See previous page.
4. Noise from faucet or drain Air gap faucet Inherent sound with air-gap faucets.
Location of drain saddle See diagram for proper location of drain saddle.
Higher capacity membrane Normal with high capacity membrane
High water pressure Check incoming water pressure to make sure it does not
exceed 100 psi. A presser relief valve may be necessary.
5. Faucet leaks from Crimp or loop in drain line Straighten black 3/8 drain tube. Cut off any excess tubing
the air gap feature Drain tube clogged/restricted Caused from dishwasher or garbage disposal.
Disconnect the 3/8” black tube at the drain, clean the 3/8”
black tube out with a wire, then reconnect.
6. Small amount of water in System just starting up Normally it takes 6-10 hours to fill tank. Note: Low
storage tank pressure and/or temperature can drastically reduce
production rate.
Low water pressure See #1 Above
Too much air in tank Add air if below 5 psi and bleed if above 5 psi. Check
only when tank is empty of water. See previous page.
7. Water leaks from the Not properly tightened. Tighten the bowl
filter housing Missing or kinked O-ring Turn off the water supply. Release the pressure, remove
bowl and replace the O-ring (p/n 113043). Make sure
the O-ring is seated in the filter bowl properly before
reinstalling the filter bowl.

Page 20
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 confidence 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 certified 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 aresenic 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) may not
convert all the trivalent arsenic. If you get your water from a public water utility, contact
the utility to find out if free chlorine or combined chlorine is used in the water system.
This Watts Premier 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 specific water quality conditions at the consumer’s installation.
The RO component of this Watts Premier reverse osmosis system must be maintained
according to its recommended maintenance cycle. Specific component identification and
ordering information can be found in the installation/operation manual maintenance section,
by phone at 1-800-752-5581 or online www.wattspremier.com.
California Proposition 65 Warning
WARNING: this product contains chemicals know to the State of California to cause cancer
and birth defects or other reproductive harm. (Installer: California law requires that this
warning be given to the consumer). For more information: www.wattsind.com/prop65.