Pentair PB5RO-75 User manual

Model PB5RO-75 Undersink Reverse Osmosis System
User Manual
247181 Rev D JA12
OPERATING SPECIFICATIONS
WARNING:
Before installing the system, make certain
your water supply complies with the
following operating specications. Failure
to do so may reduce the effectiveness
of the system and will void the warranty.
Consult your local water treatment utility or
a certied water testing lab to determine the
quality of your water and use the table below
to record your results for future reference.
PB5RO-75 Specications Your Water
Pressure Range: 40–100 psi
(2.8–6.9 bar)
Temperature Range: 40–100°F
(4.4-37.8°C)
Total Dissolved Solids < 2000 ppm
Maximum Hardness* †: 10 gpg
(171 mg/L)
Sulde, Iron and Manganese †: < 0.1
Chlorine in Water Supply: < 2 ppm
Water Supply pH Limits: 3-11
Turbidity: 5 NTU Max.
Date of Purchase:
* If the hardness of your water is above 10 gpg (171 mg/L), lime scale will build
up rapidly on the membrane inside of the RO membrane cartridge. Scale
buildup will plug the RO membrane cartridge and make the system ineffective.
We do not recommend the PB5RO to be used with water in excess of 10 gpg
(171 mg/L) hardness, unless the water is softened prior to the reverse osmosis
system.
† See your local dealer or water treatment specialist to reduce these substances
in your water.
PB5RO-75 Dimensions:
System Dimensions 13" H x 18.6" W x 4.75" D
(330 x 3472 x 120.6 mm)
Tank Dimensions 14.5" H x 11" Dia
(368 x 279 mm)
System Weight 29 lbs (10.4 kg)
Tank Capacity 3.2 gal (12.1 L)
Tools Required
• Hand or Electric Drill • Phillips Screwdrivers
• 2 Adjustable Wrenches • Drill Bits: 1/8", 1/4" and 3/8"
• File • Towel
• Pencil • Safety Glasses
• Needle-nose Pliers • Tape Measure
• Utility Knife or Tube Cutter
(for plastic tubing)
Optional Materials
(For sinks without extra hole for faucet)
• Hand or Electric Drill • Center punch
• Drill Bits: 1/4" and 3/4" • Respirator
• Teon®Tape • 1-3/8" Bi-metal or Carbide
Tipped Hole-saw
NOTE: All tools listed will not be necessary for installation.
Read installation procedures before starting to
determine required tools.
Parts Included
• Head Assembly • Drain Saddle Valve
• Screws for mounting • Water Supply Adapter
• Lead-free air gap drinking
water faucet
• Quick-connect Fitting
• Silicone grease • Storage Tank
• Tank Valve • Faucet Adapter
• Teon®Tape • Change Indication Sticker
• 3/8" Plastic Tubing
(red and blue)
• 1/4" Plastic Tubing
(white, red and green)
• TDS Test Kit
• Filter Cartridges:
PW-S2500R Cartridge Yellow
PW-C5000R Cartridge Blue
PW-RO75R Cartridge Green
PW-C2500R Cartridge Violet

GENERAL PRECAUTIONS
WARNING:
Do not use with water that is
microbiologically unsafe or of unknown
quality without adequate disinfection before
or after the system. Systems certied for
cyst reduction may be used on disinfected
waters that may contain lterable cysts.
WARNING:
The PB5RO contains a replaceable RO
membrane cartridge that is critical to the
efciency of the system. Replacement of the
RO membrane cartridge should be with one
of identical specications, as dened by the
manufacturer, to assure the same efciency
and contaminant reduction performance.
WARNING:
The PB5RO contains a replaceable RO
membrane cartridge, critical for the effective
reduction of total dissolved solids. Product
water should be tested periodically to verify
that the system is working properly.
WARNING:
The PB5RO is acceptable for treatment
of inuent concentrations of no more
than 27 mg/L nitrate and 3 mg/L nitrite in
combination measured as N and is certied
for nitrate/nitrite reduction only for water
supplies with a pressure of 40 psig (280 kPa)
or greater.
WARNING: The PB5RO shall only be used for arsenic
reduction on chlorinated water supplies
containing detectable residual free chlorine
at the system inlet. Water systems using an
in-line chlorinator should provide a one-
minute chlorine contact time before the unit.
WARNING: The PB5RO will not protect against disease-
causing bacteria or remove naturally-
occurring harmless bacteria.
CAUTION The PB5RO must be protected against freezing
which can cause the lter housing to crack,
resulting in water leakage.
CAUTION
Turn off water supply to head without cartridge if
it must be left unattended for an extended period
of time.
CAUTION
Do not use electrical heating tape on this unit.
NOTE: Substances listed as reduced are not necessarily
in your water. System must be maintained
according to manufacturer's instructions, including
replacement of lter cartridges.
NOTE: Your water must be within required limits for
satisfactory operation. If not, the RO membrane
cartridge’s life may be shortened and your warranty
will be voided (see Operating Specications).
NOTE: Install on cold water line only.
NOTE: Do not install where system will be exposed to
direct sunlight.
NOTE: Make certain that installation complies with all state
and local laws and regulations.
NOTE: The lter cartridges and RO membrane cartridge
included with the system have limited service lives.
Changes in taste, odor, and color of the ltered
water indicate that the cartridges and/or membrane
should be replaced.
NOTE: During extended periods of non-use (such as
during a vacation), remove the membrane cartridge
and the lter cartridges from the unit and place
them in a sealed plastic bag. Store the cartridges
in the refrigerator for future use. When re-starting
the unit, replace all cartridges and ush per
instructions.
NOTE: If the PB5RO stands for more than 2 to 3 days
without being used, the storage tank should be
emptied.
NOTE: Use only Teon® tape without adhesive backing
to seal joints. Do not use pipe compound (“pipe
dope”), sticks, or similar compounds with this
unit; they contain petroleum derivatives which can
cause crazing and cracking of the plastic in the
lter housing.
NOTE: Use only soap and water to clean components.
NOTE: Do not use aerosol sprays (bug spray, cleaning
uids, etc.) near the PB5RO. They contain organic
solvents which will cause crazing and cracking of
the plastic in the lter housing.
NOTE: After prolonged periods of non-use, such as a
vacation, it is recommended that the system be
ushed thoroughly. Let water run for 2 to 3 minutes
before using.
NOTE: Do not use a torch near the unit.
HOW REVERSE OSMOSIS (RO) WORKS
The PB5RO uses a semi-permeable membrane to reduce
dissolved salts, improving the taste and odor of your water. The
RO membrane cartridge contains multiple layers of micron-thin
lm wound around a hollow center core. Water molecules can
pass through the cartridge, while dissolved salts are rejected.
Your household water supply is pre-ltered to reduce dirt and
chlorine that may foul the membrane. The RO membrane
cartridge separates this pre-ltered water into PRODUCT
WATER and REJECT WATER. Your household water pressure
forces water through the membrane within the RO membrane
cartridge, and into the storage tank. This is product water.
Dissolved salts cannot pass through the membrane and are
sent to the drain as reject water. When you open the faucet,
product water (permeate) is drawn from the storage tank
through a post-polishing lter. The post-polishing lter takes out
any remaining taste or odor in the water and provides you and
your family with cleaner, great-tasting water.
The PB5RO also features an auto shut-off valve, which shuts
off the system once the pressure in the storage tank reaches
2/3 of the incoming water pressure (your household water
pressure). When you open the faucet to draw water from
the storage tank, the pressure inside the tank drops and
the auto shut-off valve opens. The system then begins to
operate, replenishing the water you took from the storage tank.
Depending on the system's efciency, for each gallon of water
produced, up to 7 gallons are discharged as reject water. The
storage tank can hold up to 3.2 gallons (12.1 L) of water at a
time, more than enough for the average family’s drinking and
cooking needs.
NOTE: When used under operating conditions specied
on page 1 of this manual, the RO membrane
cartridge of the PB5RO should last 12–24 months.
The precise life span of the PB5RO's RO membrane
cartridge will depend on the quality of the water
entering the system, and the frequency with which
you use it. Frequent use prevents the dissolved
salts from building up on the membrane as scale.
The more water the system is required to produce,
the longer the membrane will last. You may wish
to nd a variety of uses for your PB5RO system in
order to prolong the life of the membrane.
2 • JA12 Model PB5RO-75 Undersink Reverse Osmosis System

INSTALLATION
NOTE: Please read all instructions, specications, and
precautions before installing and using your
PB5RO system.
NOTE: The PB5RO may be installed under a sink or in the
basement.
NOTE: The PB5RO is installed vertically.
NOTE: Numbered diagrams correspond with numbered
steps.
NOTE: For standard installation on 1/2" 14 NPS threads
(most common thread on kitchen faucets) cold
water line.
1. Installing the Water Supply Adapter
The supply adapter ts 1/2" 14 NPS supply threads. If local
codes permit, it may be used to connect the lter system
to the cold water supply line. If local codes do not permit
the use of the supply adapter, alternate connectors can be
obtained from your local retailer.
A. Turn off cold water supply line. If cold water line does
not have a shut-off valve under the sink, one should be
installed.
B. Turn on the cold water faucet and allow all water to
drain from line.
C. Disconnect cold water line from 1/2" 14 NPS threaded
stub on bottom of main faucet.
D. Screw the water supply adapter to the threaded faucet
stub as shown.
E. Using the nut that previously connected the cold water
line to the faucet, screw the cold water line to the male
supply adapter threads.
D
A
B
C
F
E
Figure 1
2. Selecting the Faucet Location
NOTE: The drinking water faucet should be positioned
with function, convenience, and appearance in
mind. An adequate at area is required to allow
faucet base to rest securely. The faucet ts through
a 1-3/8" hole. Most sinks have pre-drilled 1-3/8" or
1-1⁄2" diameter holes that may be used for faucet
installation. If these pre-drilled holes cannot be
used or are in an inconvenient location, it will
be necessary to drill a 1-3/8" hole in the sink to
accommodate the faucet.
WARNING:
This procedure may generate dust which
can cause severe irritation if inhaled or come
in contact with the eyes. The use of safety
glasses and respirator for this procedure is
recommended.
WARNING:
Do not attempt to drill through an all-
porcelain sink. If you have an all-porcelain
sink, mount the faucet in pre-drilled sprayer
hole or drill through countertop next to sink.
WARNING:
When drilling through a countertop, make
sure the area below the drilled area is free
of wiring and piping. Make certain that
you have ample room to make the proper
connections to the bottom of the faucet.
WARNING:
Do not drill through a countertop that is
more than 1" thick.
WARNING: Do not attempt to drill through a tiled,
marble, granite or similar countertop.
Consult a plumber or the countertop
manufacturer for advice or assistance.
A. Line bottom of sink with newspaper to prevent metal
shavings, parts, or tools from falling down drain.
B. Place masking tape over the area to be drilled to help
prevent scratches if drill bit slips.
C. Mark hole with center punch. Use a 1/4" drill bit for a
pilot hole.
D. Using a 1-3/8" hole saw, drill a hole completely through
the sink. Smooth the rough edges with a le.
D
C
1⁄4”
11⁄4”
A
B
C
D
Figure 2
Model PB5RO-75 Undersink Reverse Osmosis System JA12 • 3

3. Mounting the Faucet
A. Pre-assemble the base. The rubber washer should be
in place below the base. The two toggle bolts should be
inserted through the base and the rubber washer. The
bolts are screwed into the spring-loaded toggle.
B. Place the base assembly over the hole in the sink. The
two toggles should pass through the hole far enough to
spring fully open. If they are not open, unscrew the bolt
until the toggle moves down to clear the sink.
C. Look down through the base for this step. Before
tightening the bolts, determine the correct rotation of the
base. The nal position of the handle will be 45 degrees
off from the bolt heads. Use Figure 5 to help determine
the best position for your installation.
Through the hole in the base, hold the toggle in position
while tightening the bolt. The spring loaded toggle
will contact the bottom of the counter top and hold in
position. Do not fully tighten. Repeat for second toggle
bolt.
Check the nal position of the base and toggle bolts.
Tighten the two bolts evenly. DO NOT OVERTIGHTEN.
Tighten only far enough to prevent the base from
rotating when the faucet is rotated in place.
D. Attach large diameter 3/8" (red) drain tube to the larger
barb tting at the faucet bottom. This tube should be
long enough to reach the drain clamp in Step 7.
E. Locate the 1/4" red brine tube from the right side of the
system head assembly. Route the tube through the
faucet base and connect to small barb on the faucet.
Make certain that the tube is not kinked or stressed
once the head assembly is mounted.
F. Apply 3-5 wraps of Teon tape to faucet stem. Screw
quick connector onto end of threads.
G. Wet end of 3/8" blue tube. Push into bottom of
connector. Tug gently to be sure connection is
complete. This tube should be long enough to reach the
top right side of the RO Assembly.
H. Check that the O-ring is in place on the faucet. Feed
the remaining 3/8" tubes through the base. Hold the
faucet in the nal position and rotate backwards (to the
left) while pushing down. The faucet will drop into the
base. Push down on the faucet and rotate forward (to
the right) to lock it into nal position. The O-ring will be
seated and the faucet held securely in position.
I. Insert the spout into the top opening. Hold in position
and screw the collar onto the base.
NOTE: If the faucet handle is not in the correct
position, remove the faucet, loosen the toggle
bolts and reposition the base. Tighten the
toggle bolts. Then reinstall the faucet.
Base
Black Rubber
Washer
Folds Upward
A
Figure 3
BBase Black Rubber
Washer
Will Spring Open
O-ring Seat
Figure 4
C
Handle Faces This Direction
45°
Notch For Faucet
Blades Must Be Held
When Tightening
Notch For Faucet
Figure 5
G
D
E
F
Figure 6
4. Mounting the System
CAUTION The lter head assembly should be mounted on
a stud or rm surface. The mounting bracket will
support the weight of the cartridges and help
prevent strain on the water lines.
A. Select location under sink or in basement where unit
is to be mounted. The head assembly is mounted in a
vertical position.
B. When mounting the PB5RO-75 the top of the head
must be 15-1/2" above the nearest obstacle (oor of the
cabinet). Two screws are supplied to mount the head.
Measure up from the oor of the cabinet 14-1/2". The
two screws will be 17.7" apart and level. Screw the two
INSTALLATION continued
4 • JA12 Model PB5RO-75 Undersink Reverse Osmosis System

screws into the wall. Leave a gap between the screw
head and the wall of 1/8". The backside of the system
head has two slots that will t over the screw heads and
slide down to lock.
B
17.7 Inches
Between Holes
12 Inches
From Mounting
Hole to Bottom
of Cartridge
2-1/2 Inches Clearance Below Cartridges
Figure 7
INSTALLATION continued
5. Connecting the Faucet
CAUTION
Water supply to the tee should have a separate
shut-off valve. If it does not, a separate shut-off
should be installed.
A. Locate the 3/8" blue tubing from the faucet and place a
mark 5/8" from the end of the tubing. Moisten the end of
the tubing with water and insert into the quick-connect
tting on the head assembly until the mark is ush with
the quick-connect tting.
B. Gently pull back on the tubing to ensure it is connected
properly. If the tubing comes out of tting, cut a small
section off of the tubing and reconnect.
NOTE: Tubing may be quickly and easily removed from
the tting if necessary. First, turn off the water
supply to the lter. Open faucet, then press in
the collet around the tting while pulling the
tubing with your other hand.
Figure 8
A
3/8" Red 1/4" Red
1/4" White
1/4" Green
3/8" Blue
PW-C2500R
Violet
PW-RO75R
Green
PW-C5000R
Blue
PW-S2500R
Yellow Cover Not Shown
PW-C5000R
Blue
Step 8 Step 9
Step 6
Step 11
Step 5
Model PB5RO-75 Undersink Reverse Osmosis System JA12 • 5

6. Connecting the Water Supply Adapter
A. Determine the length of 1/4" white plastic tubing needed
to connect the inlet (white collet) on the left side of the
lter with the water supply adapter. Be sure to allow
enough tubing to prevent kinking and cut the tubing
squarely. Place a mark 5/8" from the end of the tubing.
B. Wet tubing with water and insert into water supply
adapter 5/8" until mark is ush with tting. Repeat
inserting other end of tubing into inlet of the head
assembly.
7. Installing the Drain Clamp
NOTE: If you have a single-basin sink with a disposal
unit, call Technical support at 1-800-279-9404 for
options.
NOTE: Before installing the drain clamp, check the
drainpipes under the sink for corrosion. Corroded
pipes should be replaced before continuing with
installation.
A. Attach the drain clamp to a vertical section of the
drainpipe, about 6" above the trap. Make sure the
opening on the drain clamp is facing towards the
drinking water faucet.
B. Using the tting hole of the drain clamp as a guide, drill
a 1/4" hole through one side of the drainpipe.
C. Remove the drain clamp from the drainpipe and enlarge
the hole with a 3/8" drill bit. Use a le to remove rough
edges from the drilled hole.
D. Make sure the black rubber gasket is adhered to the
inside of the drain clamp and place the drain clamp
assembly over the drilled hole. Look through the hole
and position the clamp so that the center of the clamp
hole is slightly higher (about 1/16") than the center of
the drilled hole. (See Figure 11). Tighten the clamp
securely.
E. Screw the plastic compression nut onto the drain clamp
until hand-tight.
6"
A
Figure 9
C
B
Figure 10
D
E
Figure 11
8. Connecting the Faucet to the Drain
NOTE: This is a gravity drain line. Any loops, kinks or
sharp bends must be eliminated before proceeding.
Failure to create a straight line to the drain may
result in reject water leaking through the air gap
in the faucet onto the counter top and below the
faucet.
A. Align the 3/8" red tubing from the faucet with the
compression nut on the drain clamp. Create as straight
a path as possible with the tubing. Cut the tubing
squarely below the nut and remove the internal and
external burrs.
B. Loosen the compression nut two complete turns. Insert
the tubing into the nut until it stops. Tighten with ngers,
then tighten 1 to 2 turns with a wrench.
A
B
Figure 12
INSTALLATION continued
6 • JA12 Model PB5RO-75 Undersink Reverse Osmosis System

9. Installing the Cartridges
The cartridges are identied by the color of the label and
the model number.
Cartridge #1 = PW-S2500R, Yellow
Cartridge #2 = PW-C5000R, Blue
Cartridge #3 = PW-C5000R, Blue
Cartridge #4 = PW-RO75R, Green
Cartridge #5 = PW-C2500R, Violet
Install the cartridges in order. If the cartridges are installed
out of order the system will not lter correctly.
A. Slide the cartridge into the head until it can go no
further.
B. Twist the cartridge 1/4 turn clockwise until it snaps into
place. Gently pull the cartridge straight out to ensure the
cartridge is locked into place.
CAPACITY:
Replace every 12 mont hs
TEMPERATUR E RANGE:
40-100° F (4.4-3 7.8°C)
PRESSURE RA NGE:
30-125°F (2 .4-8. 6 Bar)
Quick Change
Sediment Cartridge
Foruse with Pentair Water models:
PB4RO-75,PP4RO-75 and PB5RO-75
CAPACITY:
Replace every 12 mon ths
TEMPERATU RE RANGE:
40-100° F (4.4-3 7.8°C)
PRESSURE RA NGE:
30-125°F ( 2.4-8 .6 Bar)
Quick Change
EP Cartridge
Foruse with Pentair Water models:
PB4RO-75,PP4RO-75 and PB5RO-75
©2010 Pent air Residen tial Fil tration , LLC Milwaukee, W I, USA Assembled in C hina SH24714 4 RevA MR10
Warning:Do not use with water that is microbiologicallyunsafe or of unknown qualitywithout adequate disinfection beforeor after the systems. Systems certifiedfor cyst reduction may be used ondisinfected waters that may contain filterablecysts.
Milwaukee, W I, USA
Assembled i n China SH247 143 Rev A MR10
P
W
-
C
2
5
0
0
R
ondisinfected waters that may contain filterablecysts.
P
W
-
S
2
5
0
0
R
P
W
-
C
5
0
0
0
R
P
W
-
C
2
5
0
0
R
A
B
Figure 13
10. Connecting the Storage Tank to the System
CAUTION When tank is full, it weighs approximately 35
pounds. Provide ample support under the tank.
A. Apply 3-5 wraps of Teon tape to the tank threads.
B. Thread the tank valve onto the top of the tank opening
by turning it clockwise until snug.
C. Locate the green tubing and a mark 3/4" from the end.
Moisten one end of the green tubing with water and
insert with a twisting motion into the free port of the tank
valve until the 3/4" mark is ush with the quick-connect
tting.
NOTE: Do not cut green tube. This line should be left at
the pre-cut length for future service.
NOTE: The pressurized storage tank has capacity of
3.2 gallons. The tank's air pressure is factory
set at 5 to 7 psi when tank is empty.
11. Putting the System Into Operation
CAUTION
Make certain head assembly is rmly attached
to wall to prevent it from falling and possibly
becoming damaged.
NOTE: Use caution not to bend or pinch the tubing behind
the system while attaching to mounting screws.
NOTE: The post-polishing lter may contain ne black
carbon particles. These nes are harmless, but
may make the water appear gray in color. The
carbon nes are ushed from the system with the
rst tank full of water.
NOTE: The PB5RO system does not produce a high
volume of water on demand as an ordinary lter
does. Water is produced at a slow, drop-by-drop
rate. The system requires about 3 hours to ll the
storage tank. As water is taken from the tank, the
system automatically starts the cycle of replacing
the water and then stops water production when
the tank is full.
A. Make sure cold water faucet is “off” (Figure 14).
B. Make sure tank valve is in the open position.
C. Slowly turn on cold water supply.
D. Open the faucet to turn on ow. Let the faucet run/drip
for 12 hours, then close it.
E. Allow 3 hours for the tank to ll. Continue to periodically
check the installation for leaks. After the storage tank
is lled, open the faucet to ush the post-lter cartridge
(on the right side of the lter housing). Allow 4 to 5
minutes for all of the water to drain from the tank. Close
faucet and allow tank to ll.
CAUTION
Visually check the entire system for leaks. If a leak is
present, see TROUBLESHOOTING.
F. Repeat Step E four times.
NOTE: Initially, the water may appear cloudy. This is a
result of air trapped in the post-lter cartridge.
It is not harmful and will disappear in a matter
of minutes. It may take up to a week after
installing a new post-lter cartridge for the
trapped air to dissipate.
The system is ready for operation. You can now enjoy quality
water from the PB5RO-75.
Open
Tank Valve
Closed
Tank Valve
B
Figure 14
INSTALLATION continued
A
Model PB5RO-75 Undersink Reverse Osmosis System JA12 • 7

OPTIONAL INSTALLATION
CONNECTING THE PB5RO-75 TO
REFRIGERATOR ICEMAKER/WATER
DISPENSER
CAUTION
If you are connecting the PB5RO to your
refrigerator/icemaker with initial system
installation, wait to turn on the icemaker until
the Post- Filter Cartridge (on the right side of the
lter housing) has been ushed according to
Step 11.
CAUTION
Use plastic tubing and ttings. Do not use
copper tubing or brass ttings.
NOTE: For optimum performance, it is recommended
that the distance between the PB5RO and the
refrigerator icemaker/water dispenser be no greater
than 10 feet (3 m). At distances greater than 10 feet,
the water pressure from the system may not be
adequate to deliver water to the refrigerator.
Materials Required
(available from your local hardware store)
• 3/8" x 3/8" x 3/8" (9.5 x 9.5 x 9.5 mm) compression or
quick-connect tee.
• 3/8" (9.5 mm) polyethylene tubing (maximum length of 10
feet [3 m] recommended)
• Shut-off valve
A. Turn off icemaker and refrigerator water supply. Consult
manufacturer’s guidelines.
B. Close tank valve (on top of storage tank).
C. Turn off water to the system at the cold water supply.
D. Open drinking water faucet to relieve pressure.
E. Locate blue tubing leading to your drinking water faucet.
Cut and insert the 3/8" x 3/8" x 3/8" (9.5 x 9.5 x 9.5 mm)
compression or quick-connect tee into the blue tubing
(Figure 15). Consult manufacturer’s guidelines before
installing the tee connection.
NOTE: When cutting the blue tubing, you may
experience some water leakage.
F. Using a length of 3/8" polyethylene tubing, connect
the icemaker/dispenser line with the free port on the
compression tee.
G. The shut-off valve should be installed as close to this
port of the tee as possible. Shut-off valve should be
installed in the OFF position. Consult manufacturer’s
guidelines before installing the shut-off valve.
H. Completely open cold water supply (until it comes to a
stop).
I. Open tank valve.
J. Turn off the drinking water faucet.
K. Open shut-off valve at the tee connection.
L. Turn on ice maker. Consult manufacturer’s instructions.
M. Check for leaks and tighten connections if necessary.
Tubing to drinking
water faucet
Tubing to
refrigerator
Tubing from
system outlet
Figure 15
TESTING YOUR REVERSE OSMOSIS
SYSTEM
Total Dissolved Solids (TDS) Test
NOTE: Under NSF/ANSI Standard 58, it is highly
recommended that you (the consumer) have your
water tested at least every 6 months to verify that
your system is performing satisfactorily.
Sampling Instructions:
Sampling instructions are included with the Total Dissolved
Solids (TDS) Test Kit. If the TDS Test Kit is missing from your
unit, please call Customer Support at 1-888-837-0028 for a
replacement.
Total Dissolved
Solids Test Kit
Figure 16
WHEN TO CHANGE THE CARTRIDGES
The life of the cartridge depends on the water volume used and
the substances in the water. Normally, cartridges should be
changed at intervals of 6 months. Replace the cartridge sooner
if the water pressure at the faucet begins to drop noticeably or
if you notice changes in the taste, color, or ow of the ltered
water.
8 • JA12 Model PB5RO-75 Undersink Reverse Osmosis System

CHANGING THE CARTRIDGES
Materials Needed
• Replacement Cartridges (color coded):
PW-S2500R Cartridge Yellow (1)
PW-C5000R Cartridge Blue (2)
PW-RO75R Cartridge Green (1)
PW-C2500R Cartridge Violet (1)
The pre-lter and post-lter cartridges need to be changed
when the water pressure at the faucet begins to drop
noticeably, or if there are changes in taste, color or ow of the
ltered water. All cartridges should be changed at the same
time. The cartridges are color coded to indicate which location
they are installed into.
1. Changing the Cartridges
NOTE: Only the replacement cartridges listed can be used
with this system. Failure to use recommended
replacement cartridges will void your warranty.
A. Place a small pan or towel under the PB5RO to catch
any water that may drip.
B. Twist the pre-lter cartridge (on the left side of the lter
housing) counter-clockwise for a 1/4 of a turn, and pull
the cartridge out of the system. If the system has any
signicant leaks, see Troubleshooting.
C. Push the new cartridge into the head until it can go no
further.
D. Twist the cartridge 1/4 turn clockwise until it snaps into
place.
E. Gently pull the cartridge straight out to ensure the
cartridge is locked into place.
F. Repeat for all other cartridges.
G. Turn on water and check for leaks. If leaks are found,
see Troubleshooting.
NOTE: The post lter cartridge may contain carbon
nes (very ne black powder). This will be
released during your initial ushing.
H. Flush water through the system for 5 minutes to remove
carbon nes. Check for leaks again before leaving
installation. Allow the tank to ll.
2. Flushing the RO membrane
NOTE: The PB5RO system does not produce a high
volume of water on demand as an ordinary lter
does. Water is produced at a slow, drop-by-drop
rate. The system requires about 3 hours to ll the
storage tank. As water is taken from the tank, the
system automatically starts the cycle of replacing
the water and then stops water production when
the tank is full.
A. Make sure cold water faucet is “off” (Figure 14).
B. Make sure tank valve is in the open position.
C. Slowly turn on cold water supply.
D. Open the faucet to turn on ow. Let the faucet run/drip
for 12 hours, then close it.
E. Allow 3 hours for the tank to ll. Continue to periodically
check the installation for leaks. After the storage tank
is lled, open the faucet to ush the post-lter cartridge
(on the right side of the lter housing). Allow 4 to 5
minutes for all of the water to drain from the tank. Close
faucet and allow tank to ll.
CAUTION
Visually check the entire system for leaks. If a leak is
present, seeTROUBLESHOOTING.
F. Repeat Step E four times.
TROUBLESHOOTING
Leaks on Supply Adapter Connection
1. Turn off water supply valve and turn on drinking water
faucet to release pressure in system.
2. Loosen leaking threaded tting on supply adapter or pull
out leaking tubing by pressing collar surrounding tubing
while pulling the tubing with your other hand.
3. Inspect to see if plastic tubing is scratched and supply
adapter was properly attached.
4. If tubing is scratched, cut off 1/2" to 5/8" and reinstall.
Leaks on Faucet/Tubing Connection
1. Turn off water supply valve and turn on drinking water
faucet to release pressure.
2. Unscrew tubing nut at bottom of faucet. Inspect the tubing.
The insert, plastic ring and tubing should not be damaged.
3. Check if insert is in place and tubing is cut squarely and
not scratched, cut tubing if necessary to get square smooth
end.
4. If the tubing is smooth and square, reconnect tubing by
inserting into faucet and tightening nut. The plastic ring
should be held tight to the faucet system when the nut is
tight.
5. Turn on water supply valve, then close faucet and check for
leaks.
NOTE: If leaks persist, or if there are other leaks on
system, turn off water supply and call Technical
Support 1-800-279-9404.
Leaks Between Cartridge and Filter Housing
1. Turn off cold water supply to system at saddle valve. Close
tank valve. Open drinking water faucet to relieve water
pressure.
2. Remove the cartridge, inspecting it for damage. Inspect
O-rings to make sure they are seated and clean.
3. Insert and twist the cartridge back into the lter housing.
4. Turn on water supply at saddle valve. Open tank valve.
Close drinking water faucet after water begins to ow. If
leaks persist, call Technical Support.
Leak Between Tank Valve and Storage Tank
1. Turn off water supply to system at the saddle valve. Open
faucet to drain storage tank. Let faucet run for 3–5 minutes
until it drips.
2. Remove green tubing from tank valve by pressing the collar
around the tting while pulling the tubing with your other
hand.
3. Unscrew the tank valve from the storage tank.
4. Place three wraps of Teon®tape on the threads of the
storage tank.
5. Thread the tank valve onto the top of the tank opening by
turning it clockwise until snug.
6. Cut off 1" of tubing. Tubing should be cut squarely. Internal
and external burrs should be removed. Place a mark on
tubing 3/4" from end of tubing.
7. Wet the tubing and insert until the mark is ush with the
quick-connect tting.
8. Turn water supply on at the saddle valve and close drinking
water faucet.
9. Allow system to pressurize for several hours and check for
leaks.
10. Check for leaks after tank is fully pressurized (1–3 hours). If
leak persists, call Technical Support .
Model PB5RO-75 Undersink Reverse Osmosis System JA12 • 9

Leaks at Quick-Connect Fittings
CAUTION
The 1/4" red tubing connected to the top of the
fourth cartridge has a ow restrictor installed.
The system will not operate correctly if the
restrictor is removed.
1. Close tank valve, close saddle valve, and open drinking
water faucet.
2. Press collar around the quick-connect tting while pulling
the tubing with your other hand.
3. Cut off 1" of tubing. Tubing should be cut squarely. Internal
and external burs should be removed. Place a mark on
tubing 5/8" from end on 1/4" tubing or 3/4" from end on 3/8"
tubing.
4. Wet the end and insert tubing until the mark is ush with the
quick-connect tting.
5. Open the saddle valve until it comes to a stop. Open the
tank valve and close drinking water faucet. If leaks persist,
call Technical Support.
Leaks from Faucet
1. Check to make sure white tubing leading from the drinking
water faucet to the drain is as straight as possible (it is
usually necessary to cut this line during installation). Any
kinks or sags in this drain line will impede the ow of water
to the drain.
2. Check to make sure the drain clamp and the drain hole are
properly aligned. (Refer to Figure 7 on page 7).
1. Check to make sure there is no foreign matter clogging the
drain line or at the drain clamp hole. If leaks persist, call
Technical Support.
No Flow or Slow Flow from the Brine (Reject) Line (Less
than 6 . oz. or 180 milliliters per minute)
NOTE: Before checking brine (or reject) ow, make sure
the unit is producing water by turning the valve on
the storage tank off and opening the drinking water
faucet. Water should drip from faucet.
1. Replace the pre-lter cartridge according to the changing
the lter cartridge instructions and recheck the brine (or
reject) ow rate.
2. If the pre-lter cartridge is not at fault, the brine (or reject)
ow controller could be clogged. Call Technical Support.
High TDS in Product Water
1. If high TDS (Total Dissolved Solids) is detected in the
product water, the RO Cartridge may need to be replaced
or the reject ow control tubing may be clogged. If this is a
new installation, call Technical Support.
2. Otherwise, draw 1 gallon of water from the unit. After 10
minutes, then run water from the faucet and test the water
again.
3. Determine when you last changed the RO Filter Cartridge
and call Technical Support.
Limited Flow at Drinking Water Faucet
1. Turn off water supply to system at saddle valve.
2. Open the faucet to turn on ow.
3. Unscrew the blue cap at the base of the storage tank to
expose air valve. Use a small air compressor or bicycle
pump to add air to the storage tank. This will force the
water out of the storage tank through the faucet. Continue
to add air until no more water comes out of the faucet.
4. Turn off the drinking water faucet.
5. Using an air pressure gauge, adjust the pressure in the
storage tank to 5–7 psi.
6. Replace the blue cap.
7. Open the saddle valve until it comes to a stop. Let the
system run 1–3 hours to ll the tank. A full tank weighs
approximately 33 pounds. If performance has not improved,
call Technical Support.
Sudden Return of Taste and Odor
If shortly after complete servicing, noticeable taste and odors
return, contact Technical Support.
If you are experiencing a problem not listed in this manual,
shut off the water supply at the saddle valve and close the tank
valve. Call Technical Support.
TROUBLESHOOTING continued
10 • JA12 Model PB5RO-75 Undersink Reverse Osmosis System

WARNING: Do not use with water that is
microbiologically unsafe or of unknown
quality without adequate disinfection before
or after the system. Systems certied for
cyst reduction may be used on disinfected
waters that may contain lterable cysts.
NOTE: Substances that may be reduced are not
necessarily in your water. Filter must be maintained
according to manufacturer’s instructions, including
replacement of lter cartridges.
MAINTENANCE
Contact your water treatment professional for replacement
cartridge pricing.
SUGGESTED LIST PRICE
REPLACEMENT CARTRIDGES
555612-96 PWS2500R: $8.94
555586-96 PW-C500R: $18.54
555613-96 PW-RO75R: $44.00
555585-96 PW-C2500R: $12.16
REPLACEMENT PARTS
For replacement parts contact your local retailer or call
Customer Service at 1-800-279-9404.
Item
#
Part Number Description QTY
1 244877 Storage Tank 3.2 Gal 1
2 555612-96 Cartridge, Sediment PW-S2500R,
Yellow
1
3 555586-96 Cartridge, Carbon Block PW-C5000R,
Blue
2
4 555676-96 Cartridge, RO Element, 75 GPD
PW-RO75R, Green
1
5 555585-96 Cartridge, GAC PW-C2500R, Violet 1
6 244876 Kit, Faucet 1
244857 Faucet, Air Gap - Paragon (includes
toggles)
1
244783 Valve, RO Tank 1/4" NPT x 1/4" QC 1
247117 Label, Water Change Reminder 2
1-459-00 Mounting Screw 2
143495 Lubricant, Silicone Packet 1
244796 Drain Clamp, 3/8" QC 1
244797 Inlet Adaptor, 1/2" FIPS x 1/2" MIPS x
1/4" QC
1
244880 Faucet Adaptor, 1/4" NPT x 3/8" QC 1
150646 TDS Test Kit 1
7 244849 Tube, 3/8" OD Red - Faucet Drain 1
8 244848 Tube, 3/8" OD Blue - Permeate 1
9 244794 Tube, 1/4" OD White PE 1
10 244850 Tube, 1/4" OD Green 1
11 244875 Tube, 1/4" OD Red 1
12 357486 Head Assembly Includes Bracket,
Screws, Manifold Assembly and
Plastic Tee
1
247181 Manual, PB5RO (Not Shown) 1
SILICONELUBRICANT
IT’S TIME TO CHANGE YOUR
Place this half of the label on your
calendar,date book or refrigerator.
Bend and Peel Here
Change your water filter
cartridge on:
Place this half on your filter housing.
For more info: 1-800-279-9404
month day year
SH247117 JA10
IT’S TIME TO CHANGE YOUR
Place this half of the label on your
calendar,date book or refrigerator.
Bend and Peel Here
Change your water filter
cartridge on:
Place this half on your filter housing.
For more info: 1-800-279-9404
month day year
SH247117 JA10
112
98
7
6
5432
10 11
Model PB5RO-75 Undersink Reverse Osmosis System JA12 • 11

Arsenic Fact Sheet
Arsenic (abbreviated As) is found naturally in some well
water. Arsenic in water has no color, taste or odor. It must
be measured by a lab test. Public water utilities must have
their water tested for arsenic. You can get the results from
your water utility. If you have your own well, you can have
the water tested. The local health department or state
environmental health agency can provide a list of certied
labs. The cost is typically $15 to $30. Information about
arsenic in water can be found on the Internet at the US
Environmental Protection Agency web site: www.epa.gov/
safewater/arsenic.html.
There are two forms of arsenic: pentavalent arsenic [also
called As(V), As(+5), and arsenate] and trivalent arsenic
[also called As(III), As(+3) and arsenite]. In well water,
arsenic may be pentavalent, trivalent, or a combination
of both. Special sampling procedures are needed for a
lab to determine what type and how much of each type of
arsenic is in the water. Check with the labs in your area to
see if they can provide this type of service.
Reverse osmosis (RO) water treatment systems do not
remove trivalent arsenic from water very well. 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 nd out if
free chlorine or combined chlorine is used in the water
system.
The PB5RO-75 system is designed to remove pentavalent
arsenic. It will not convert trivalent arsenic to pentavalent
arsenic. The system was tested in a lab. Under those
conditions, the system reduced 0.30 mg/L (ppm)
pentavalent arsenic to 0.010 mg/L (ppm) (the USEPA
standard for drinking water) or less. The performance of
the system may be different at your installation. Have the
treated water tested for arsenic to check if the system is
working properly.
The RO component of the PB5RO-75 system must be
replaced every 12-24 months to ensure the system will
continue to remove pentavalent arsenic. The component
identication and locations where you can purchase the
component are listed in the installation/operation manual.
12 • JA12 Model PB5RO-75 Undersink Reverse Osmosis System

Model PB5RO-75 Undersink Reverse Osmosis System JA12 • 13
Performance Data
Important Notice: Read this performance data and compare
the capabilities of this system with your actual water treatment
needs. It is recommended that before installing a water
treatment system, you have your water supply tested to
determine your actual water treatment needs.
This system has been tested according to NSF/ANSI 58 for the
reduction of the substances listed below. The concentration
for the indicated substances in water entering the system
was reduced to a concentration less than or equal to the
permissible limit for water leaving the system, as specied in
NSF/ANSI 58.
NOTE: Substances that may be reduced are not
necessarily in your water. Filter must be maintained
according to manufacturer’s instructions, including
replacement of lter cartridges.
The tested efciency rating for this system is 15.80%.
Efciency rating means the percentage of the inuent water
to the system that is available to the user as reverse osmosis
treated water under operating conditions that approximate
typical daily usage. The tested recovery rating is 27.40%.
Recovery rating means the percentage of the inuent water
to the membrane portion of the system that is available to the
user as reverse osmosis treated water when the system is
operated without a storage tank or when the storage tank is
bypassed.
The PB5RO-75 is Tested and Certied by NSF International
against NSF/ANSI Standard 42 and 58 for the reduction of
substances listed in the table above.
PB5RO-75
Substance
Inuent Challenge
Concentration
Maximum
Permissible
Product Water
Concentration
Reduction
Requirements
Average
Reduction
Standard 58
Arsenic V 0.050 mg/L ± 10% 0.010 mg/L 97.6%
Barium 10.0 mg/L ± 10% 2.0 mg/L 96.7%
Cadmium 0.03 mg/L ± 10% 0.005 mg/L 98.2%
Chromium III 0.3 mg/L ± 10% 0.1 mg/L 97.6%
Chromium VI 0.3 mg/L ± 10% 0.1 mg/L 97.0%
Copper 3.0 mg/L ± 10% 1.3 mg/L 98.8%
Cysts Minimum 50,000/mL 99.95% 99.99%
Fluoride 8.0 mg/L ± 10% 1.5 mg/L 96.2%
Lead 0.15 mg/L ± 10% 0.010 mg/L 99.0%
Radium
226/228 27pCi/L ± 10% 5pCi/L 80%
Selenium 0.10 mg/L ± 10% 0.05 mg/L 98.0%
Total Dissolved
Solids 750 mg/L ± 40 mg/L 187 mg/L 94.9%
Turbidity 11 mg/L ± 1 NTU 0.5 NTU 99.1%
Standard 42
Chlorine 2 mg/L >=50% 93.0%
Production Rate: 24.83 gpd
Testing was performed under standard laboratory conditions,
actual performance may vary.

14 • JA12 Model PB5RO-75 Undersink Reverse Osmosis System
State of California
Department of Public Health
Water Treatment Device
Certificate Number
Date Issued: October 24, 2011
Trademark/Model Designation Replacement Elements
209811 -
Pentair Water PB5RO-75 PW-RO75R
(
RO Membrane
)
PW-S2500R
(
Pre Filters
)
PW-C5000R
(
Pre Filters
)
PW-C5000R
(
Pre Filters
)
PW-C2500R
(
Post Filter
)
Manufacturer: Pentair Residential Filtration, LLC
The water treatment device(s) listed on this certificate have met the testing requirements pursuant to Section
116830 of the Health and Safety Code for the following health related contaminants:
Cysts
Turbidity
Arsenic (pentavalent)1
Barium
Cadmium
Chromium (hexalent)
Chromium (trivalent)
Copper
Fluoride
Lead
Radium 226/228
Selenium
None
Microbiological Contaminants and Turbidity Inorganic/Radiological Contaminants
Organic Contaminants
Do not use where water is microbiologically unsafe or with water of unknown quality, except that systems certified
for cyst reduction may be used on disinfected waters that may contain filterable cysts.
1 Claims for arsenic reduction shall only be made on water supplies maintaining detectable residual free chlorine at the
reverse osmosis (RO) system inlet. Water systems using an in-line chlorinator should provide a minimum of 1 minute
chlorine contact time before the RO system.
1250 gal service cycle
Rated Service Capacity: 24.8 gpd
Rated Service Flow:
Conditions of Certification:

Model PB5RO-75 Undersink Reverse Osmosis System JA12 • 15
Pentair Residential Filtration, LLC LIMITED WARRANTY
Pentair Residential Filtration, LLC warrants to the original owner (under normal use): Reverse Osmosis System to be free from defects in material and/or
workmanship one (1) year from the date of purchase. Any replacement products furnished will be free from defects in material and/or workmanship for the
remainder of the original warranty period. This warranty does not cover: (1) pre and post filter cartridges, or reverse osmosis membrane (2) defects not reported
within the above time period, (3) items manufactured by other companies, (4) problems arising from failure to comply with Pentair Residential Filtration, LLC
instructions, (5) problems and/or damage arising from acts of nature, abuse, misuse, negligence or accident by any party other than Pentair Residential Filtration,
LLC, (6) problems and/or damage resulting in whole or in part from alteration, modification, repair or attempted alteration, modification or repair by any party other
than Pentair Residential Filtration, LLC, (7) noncompliance with applicable codes/ordinances.
If a defect in workmanship and/or material in a product or part covered by the warranty should arise, Pentair Residential Filtration, LLC, at its sole discretion, will
repair or replace the defective product or part (Pentair Residential Filtration, LLC may consider, in good faith, the customer’s preference).
All claimed defective product must: (1) be authorized for return by Pentair Residential Filtration, LLC with an RGA number (2) include proof of the purchase date of
the product or part (3) returned to Pentair Residential Filtration, LLC prior to the expiration of the warranty date, at the customer’s expense, shipment pre-paid, (4) be
accompanied by a letter detailing the Model Number, Serial Number (if any), and a brief description of the problem.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, PENTAIR RESIDENTIAL FILTRATION, LLC DISCLAIMS ALL OTHER WARRANTIES, WHETHER
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH
REGARD TO THE PRODUCTS, PARTS AND ANY ACCOMPANYING WRITTEN MATERIALS.
To the maximum extent permitted by applicable law, Pentair Residential Filtration, LLC shall not be liable for any damages whatsoever (including, but not limited
to, loss of time, inconvenience, expenses, labor or material charges incurred in connection with the removal or replacement of the system, special, incidental,
consequential, or indirect damages for personal injury, loss of business profits, business interruption, loss of business information, or any other pecuniary loss)
arising out of the use of or inability to use the defective products or parts, even if Pentair Residential Filtration, LLC has been advised of the possibility of such
damages.
Pentair Residential Filtration, LLC'S maximum liability under any provision of this Limited Warranty shall be limited to the amount actually paid for the system.
NOTE: Because some states do not allow the exclusion or limitation of incidental or consequential damages, the above limitations or exclusions may not apply.
THIS WARRANTY GRANTS SPECIFIC LEGAL RIGHTS, AND OTHER RIGHTS MAY APPLY. SUCH RIGHTS VARY FROM STATE TO STATE.

Buyer Seller Date
5730 North Glen Park Road, Milwaukee, WI 53209
Technical Support: 800.279.9404
www.pentairaqua.com/pro
©2012 Pentair Residential Filtration, LLC 247181 Rev D JA12