If you have questions about ordering Pentair Water Pool and Spa (“Pentair”) replacement parts, and pool products,
please use the following contact information:
i
Customer Service (8 A.M. to 5 P.M. — Eastern and
Pacific Times)
Phone: (800) 831-7133
Fax: (800) 284-4151
Web site
visit www.pentairpool.com or www.staritepool.com to
find information about Pentair products.
Table of Contents
General Installation Information .......................
Important Warning and Safety Instructions .....
Installation and Operation ................................
Valve Connection and Filter Position
Installing the Valve onto the Filter
Important Installation Guidelines
Normal Operation
Backwashing
condition. BE SURE to purge all air from the system
before operating or testing equipment.
• DONOTpressuretestwithcompressedair!
For information about the Virginia Graeme Baker Pool and Spa Safety Act, contact the Consumer Product Safety
Commission at (301) 504-7908 or visit www.cpsc.gov.
Important Note: Always turn off all power to the pool pump before installing the cover or working on any suction outlet.
equipment must meet local and/or National Electrical
Code standards.
P/N 270505 Rev. B 4/19/12
FullFloXF™ Backwash Valve Installation and User’s Guide
ii
IMPORTANT WARNING AND SAFETY INSTRUCTIONS
Important Notice:
This guide provides installation and operation instructions for the
FullFloXF™ Backwash Valve. Consult Pentair with any questions
regarding this equipment.
Attention Installer: This guide contains important information about
the installation, operation and safe use of this product. This information
should be given to the owner and/or operator of this equipment after
installation or left on or near the valve.
Attention User: This manual contains important information that
will help you in operating and maintaining this valve. Please retain it for
future reference.
Before installing this product, read and follow all
warning notices and instructions which are included.
Failure to follow safety warnings and instructions can result in severe
injury, death, or property damage. Call (800) 831-7133 for additional free
copies of these instructions.
Consumer Information and Safety
The FullFloXF™ Backwash Valve is designed and manufactured to provide
many years of safe and reliable service when installed, operated and
maintained according to the information in this manual and the installation
codes referred to in later sections. Throughout the manual, safety warnings
and cautions are identified by the “ ” symbol. Be sure to read and
comply with all of the warnings and cautions.
SERIOUS BODILY INJURY OR DEATH CAN
RESULT IF THIS VALVE IS NOT INSTALLED
AND USED CORRECTLY.
INSTALLERS, POOL OPERATORS AND
POOL OWNERS MUST READ THESE
WARNINGS AND ALL INSTRUCTIONS
BEFORE USING THIS VALVE.
This valve is intended for use in swimming pool
applications. Most states and local codes regulate
the construction, installation, and operation of public pools and spas,
and the construction of residential pools and spas. It is important to
comply with these codes, many of which directly regulate the installation
and use of this product. Consult your local building and health codes
for more information.
To reduce risk of injury, do not permit children to
use or operate this valve.
When setting up pool turnovers or flow rates the
operator must consider local codes governing
turnovers as well as disinfectant feed ratios.
DO NOT increase pump size; this will increase
the flow rate through the circulating system and
may exceed the maximum flow rate stated on the
drain cover.
Pumps are not a substitute for properly installed
and secured pool drain covers. An ANSI/ASME
A112.19.8 approved anti-entrapment drain cover must be used for each
drain. Pools and spas should utilize a minimum of two drains per pump.
If a drain cover becomes loose, broken or is missing, close the pool or
spa immediately and shut off the pump until an approved anti-entrapment
drain cover is properly installed with the manufacturer’s supplied screw.
FILTER OPERATES UNDER HIGH PRESSURE.
When any part of the circulating system, (e.g., clamp,
pump, filter, valve(s), etc.), is serviced, air can enter
the system and become pressurized. Pressurized
air can cause the lid to separate which can result in
severe injury, death, or property damage.
To avoid this potential hazard, follow these instructions:
1. Before repositioning valve(s) and before beginning the assembly,
disassembly, or adjustment of the clamp or any other service of the
circulating system: (A) Turn the pump OFF and shut OFF any automatic
controls to ensure the system is NOT inadvertently started during the
servicing; (B) open the manual air relief valve; (C) stand clear of the
filter; (D) wait until all pressure is relieved.
3. Once service on the circulating system is complete FOLLOW SYSTEM RESTART INSTRUCTIONS EXACTLY.
4. Maintain circulation system properly. Replace worn or damaged parts
immediately, (e.g., clamp, pressure gauge, valve(s), o-rings, etc).
5. Be sure that the filter is properly mounted and positioned according
to instructions provided.
The valve must be installed by a qualified pool
serviceman in accordance with the National
Electrical Code and all applicable local codes and
ordinances. Always disconnect power to the pool
equipment at the circuit breaker before servicing
any of the equipment. Be sure that the disconnected circuit is locked
out or properly tagged so that it cannot be switched on while you are
working on the pool equipment. Failure to do so could result in serious
injury or death to serviceman, pool users or others due to electric
shock. Position the filter and the air relief valve to safely direct water
drainage and purged air or water. Water discharged from an improperly
positioned filter or valve can create an electrical hazard that can cause
severe personal injury as well as damage property.
A pool or spa pump must be installed by a qualified
pool and spa service professional in accordance
with the National Electrical Code and all applicable local codes and
ordinances. Improper installation may create an electrical hazard which
could result in death or serious injury to pool users, installers, or others
due to electrical shock, and may also cause damage to property.
For filters intended for use in other than single-family
dwellings, a clearly labeled emergency switch shall
be provided as part of the installation. The switch shall be readily
accessible to the occupants and shall be installed at least 5 feet
(1.52 m) away, adjacent to, and within sight of, the valve.
Water temperature in excess of 100°F (37.7°C) may
be hazardous to your health. Prolonged immersion
in hot water may induce hyperthermia. Hyperthermia occurs when the
internal temperature of the body reaches several degrees above normal
body temperature of 98.6°F (37°). Effects of hyperthermia include: (1)
Unawareness of impending danger. (2) Failure to perceive heat. (3)
Failure to recognize the need to leave the spa. (4) Physical inability to
exit the spa. (5) Fetal damage in pregnant women. (6) Unconsciousness
resulting in danger of drowning. The use of alcohol, drugs, or medication
can greatly increase the risk of fatal hyperthermia in hot tubs and spas.
FullFloXF™ Backwash Valve Installation and User’s Guide
Installation and Operation
Valve Position: Filter Inlet on TOPValve Part Numbers: Filter Inlet on TOP
P/N 263080
Pentair
P/N 262509
No Fittings
P/N 262507
Sta-Rite
Filter Inlet
To Pool
From
Pump
Do not operate this unit above the maximum operating pressure of the valve or the filter. Operating your system above maximum
recommended pressure may cause your filter or valve to separate and result in severe injury, death, and property damage. Never
connect the filter and valve unit to a pump, which can generate a pressure that exceeds the operating
pressure of the filter or valve.
Chemical fumes and/or spills can severely damage the structural components of the filter or valve. Structurally weakened
components can cause the valve or the filter lid to separate and result in severe bodily injury, death, and property damage.
If the valve is hard to rotate, shut the pump off before rotating between positions. Do not use excessive force. If shutting off the
pump does not ease the rotation, service the valve as described in this manual. There may be foreign objects obstructing one of
the internal components.
Be careful not to allow any glue to get into the central bore of the valve body, as this can damage the internal components.
Do not use excess amounts of glue.
1
Valve Connection and Filter Position
1. The images below show the valve orientations that
correspond to filter inlet position (depends if the
inlet is on the top or the bottom).
2. Align the valve with the filter tank according
to the part numbers listed below. Push the
valve into the ports and turn the bulkhead nuts
snugly on the tank fittings. Hand tighten the
nuts - no tools are required.
Valve Position: Filter Inlet on BOTTOM Valve Part Numbers: Filter Inlet on BOTTOM
To Pool
P/N 263081
Pentair
From
Pump
Filter Inlet
P/N 262512
FullFloXF
P/N 262508
Sta-Rite
P/N 262511
No Fittings
FullFloXF™ Backwash Valve Installation and User’s Guide
2
Installing the Valve onto the Filter
1. Turn off all power to the system.
For retrofit installations only, follow steps a-d.
For new installations, proceed to Step 2.
a. Open the pressure relief valve on the top of
the filter. Stand clear while air is released from
the system.
b. If the filter is below pool level, close the suc-
tion and return line valves to isolate the filtration system.
c. Remove the drain plug from the filter to drain
the water from the filter.
d. Remove existing valve from the filter.
2. Place O-rings on the face of the union fittings,
where the face of the backwash valve union will
connect to the filter bulkheads. Be sure O-Ring is
seated into the groove of each union piece.
1
Union Nut
Adapter
2
Important Installation Guidelines
1. Piping size: 2-1/2” or 3” CPVC/PVC pipe fittings can be plumbed directly into valve port socket. 3”
plumbing requires a 3” coupling or 90° elbow slipped
over the valve port spigot. (Also can be used with
any size PVC plumbing with appropriate adapters).
Note: Be sure that no glue enters inside of valve
body past the ports. The recommended pipe glue
to use is WELD-ON® 724 CPVC, GRAY or glue
types such as WELD-ON® 790™ MULTI-PURPOSE
SOLVENT CEMENT.
2. Support piping in such a way that strain is not
placed on the valve or filter.
3. The maximum operating pressure of this valve is
50 psi. The filter unit also has a maximum operating
pressure listed on the filter nameplate.
Normal Operation
1. Be sure the valve handle is pointing towards FILTER.
2. Turn on the filter pump. Check the system for
normal water flow.
Retainer
Ring
3
XF Union Installation
Sta-Rite Union Installation
4
Union Nut
O-Ring
3. Holding the valve upright, place onto the filter
bulkheads. Tighten both union nuts to secure the
valve on the filter.
4. Plumb the discharge of the pump into the valve
inlet labeled FILTER INLET.
5. Plumb the valve outlet labeled FILTER OUTLET
to the heater or pool return lines.
6. Plumb the WASTE ports as needed. Let the
system dry for 24 hours.
Backwashing
1. Turn off all system pump(s).
2. Release all pressure from the system at the
main filter.
3. Turn the valve handle to the BACKWASH
position.
4. Turn on the system pump(s) and run the system
until the water runs clean.
5. Turn off all system pump(s).
6. Return the valve handle to the FILTER position.
7. Turn on system pump(s) and check for normal
water flow.
3-Way Valve
Spa Pool
OFF
Filter Pump
Pump Outlet
(Pool Return)
Filter
Pump Inlet
(From Pump)
Backwash Valve
FullFloXF™ Backwash Valve Installation and User’s Guide
To Waste
Normal Operation
3
Servicing
Incorrect assembly of the internal components may cause your filter to dead head and could cause severe bodily and/or property
damage.
Use only use silicone based lubricants on the valve, other types of lubricant may damage the plastic or rubber components.
Removing Diverters for Inspection or Service
1. Shut off the pump and open the manual relief valve on
the filter to relieve all internal pressure.
2. If the filter is below the pool water level, close the
suction and the return line valves to isolate the filtration
equipment.
3. Drain the filter by moving the valve handle to the
backwash position and removing the filter drain plug.
4. Remove the handle by firmly pulling the handle straight up.
5. Pull the tabs (if needed, insert two flat head screwdrivers
behind the tabs) and rotate the top counter-clockwise
to unlock. Remove the end cap.
6. Slowly pull out the diverter assembly.
Note which diverter is on the top before reassembling.
Removing the Handle
Cleaning and/or Replacing the Diverters
1. DOW CORNING® 111 LUBRICANT or similar lubricant
is recommended as a seal lubricant.
Note: This lubricant is formulated to seal surfaces and
extends the lubrication period. Many other lubricants
are broken down quickly by pool water and have a short
lubricating life.
2. Inspect all seals for nicks and cuts. Replace diverter
if damaged.
3. Inspect the bore of the valve especially around the
ports. Deep scratches and cuts in this area may cause
leaks from the waste port. Replace valve if damaged.
4. Using a clean cloth, thoroughly clean all seals and the
bore of the valve.
5. Apply liberal amounts of DOW CORNING® 111
LUBRICANT or similar lubricant to the surface of all
seals.
Cleaning and/or Replacing the O-Rings on
Diverter and End Cap
Removing the End Cap
End Cap
End Cap O-Ring
Diverter O-Ring
1. Without over-stretching, remove and clean O-rings with
a clean cloth.
2. Clean the O-ring grooves with a clean cloth.
3. Apply liberal amounts of DOW CORNING® 111
LUBRICANT or similar seal lubricant to the O-rings.
4. Replace the O-rings in their grooves.
FullFloXF™ Backwash Valve Installation and User’s Guide
Cleaning the O-Ring
4
F
I
L
T
E
R
B
A
C
K
W
A
S
H
Valve Reassembly
1. Insert the outlet diverter into the center diverter.
Align the three keys as shown below.
2. Insert the inlet diverter into the center diverter.
Align the fins as shown below.
3. Insert spring and seal into the correct key of the
center diverter. Follow either configuration A or B
below, based on the model part number:
A. Inlet on TOP: P/N 263080, 262507, 262509
B. Inlet on BOTTOM: P/N 263081, 262508, 262511, 262512
Note: There are two possible positions for the seal,
the text on the center diverters states which side to
place the seal.
4. Lubricate all sealing surfaces on the seal and diverters
with DOW CORNING® 111 LUBRICANT or similar
lubricant.
12
&
Inlet
Diverter
3
A. Inlet on TOP
Waste
Seal
5. Slide the diverter assembly into the body of the valve.
Follow configuration A or B below.
6. Align the arrow and notch on the end cap and body.
7. Press the cap on and turn clockwise until the side
snaps are locked into place.
Note: End caps only fit one way and must be locked
into place.
8. Partially install the handle and rotate until the arrow
on the handle is between the two arrows on end
cap.
9. Press the handle until it is locked into place.
10. Inspect the valve. When valve is in the filter position,
the waste port should be blocked off with the waste
seal.
Align the notch on the end cap with the arrow.
6
Fins
to align
5
Outlet
Diverter
Outlet
Diverter
Inlet
Diverter
Keys
to align
A. Inlet on TOP
Center
Diverter
Spring
B. Inlet on BOTTOM
Spring
Waste
Seal
B. Inlet on BOTTOM
Inlet
Diverter
Outlet
Diverter
Press the cap down and turn clockwise.
7
Install handle. Rotate until arrow on handle is
8
between the ‘Filter’ and ‘Backwash’ arrows.
FullFloXF™ Backwash Valve Installation and User’s Guide
Maintenance
Continuing to operate a valve with damaged components could result in sudden failure of valve structural components, which
could possibly cause flooding or serious personal injury due to a sudden release of filter system pressure. Inspect and service
your valve regularly as described in this section.
To extend valve life, periodically inspect shaft seals and valve bore for dirt and clean as described in the Servicing section on
page 3. To extend seal life, remove diverters and lubricate periodically.
Valve Care
Proper care and valve maintenance will add many years
of service to the pool. The service life of the valve is
determined by factors such as dirt, heat, weather
exposure, etc.
Follow the suggestions described in this section to
maximize the life of the valve.
1. Dirt
Dirt particles may accumulate on the seals and
can scratch the valve body during normal filter
operation and backwashing.
These scratches can accumulate on the bore
which cannot be repaired.
Replace valve or diverters when the seals can no
longer function properly from dirt accumulation
2. Heat
This valve is not damaged by temperatures found
in correctly plumbed pool and spa installations.
Heat damage can be caused by:
•Improper heater installation or operation:
Heaters should be located after the pool
filtration equipment and must have a check
valve or similar device that ensures super
heated water cannot backup into the valve
when the pump is switched off.
•Circulation pump operating with no flow:
Pumps transfer heat into the water; if there
is no water flow due to a closed valve or loss
of prime, water in the pump will become very
hot and can damage any pool equipment inline and close to the pump.
•Always be sure the system valves are open
so that water is free to flow through the pool
equipment.
3. Weather Exposure
All materials are affected to some degree by weather
exposure. Materials used in this valve are suitable
for outdoor use.
•To extend valve life, protect from weathering,
especially direct sunlight.
•Years of outdoor exposure can cause materials
to become structurally weakened.
•Always replace valve components that show
signs of deterioration, such as cracked surfaces
and/or significant discoloration.
5
4. Chemical Damage
•Maintain pool water chemistry properly. Pool
chemistry is a specialized area and you should
consult your pool service specialist for specific
details.
•Always introduce chemicals into the pool after
water flow passes through the pool filtration
equipment.
•Use only silicone based lubricants. Other
lubricants may damage valve components.
•Always install a check valve between in-line
chlorinators and pool equipment to prevent
chlorine gas from backing up into the pool
equipment.
5. Lubrication
Thick silicone grease allows O -rings to glide easily
over stationary plastic surfaces. Lubrication makes
handle actuation easy and ensures seals are not
damaged when passing over internal passageways
in the valve.
•Frequency of lubrication depends on:
-Frequency of actuation
-Water chemistry
-Water quality
-Water temperature
•Inspect seals and the small shaft seal after three
(3) months to be sure they are well lubricated.
•Valve may be reassembled and checked again
in three (3) more months.
•O-rings that have been cut, nibbled out, or
twisted may be signs of inadequate lubrication.
Damaged O-rings must be replaced.
Winterizing
1. Consult your filter operation and user’s manual
for winterizing instructions.
2. If possible, remove, clean and lubricate the
O-rings and diverters as described on page 3.
3. Store the parts in an airtight container or sealed
plastic bag that protects from light and air.
4. Store away from heat.
Note: If the diverters will be left in the valve body
during the winter, lubricate the valve first to be
sure the diverters will actuate easily after several
months without movement.
FullFloXF™ Backwash Valve Installation and User’s Guide
6
Troubleshooting
ProblemPossible CauseCorrective Action
Leak to waste.
Dirt on seal, damaged seal.
Service valve
(see servicing instructions on page 3).
Leak around shaft exiting
from cap.
Leak between end-cap and valve
body.
Handle is hard to actuate.
Scratched valve bore.
Heat damage to valve bore
(oversized or out of round).
Dirt on small diverter O-rings or
damaged seal.
Damaged end cap or diverter.
Dirt or damage to end cap O-ring.
Sealing surface on the body
damaged.
End cap O-ring groove damaged.
Seals and/or small shaft seals and/or diverters
need lubrication or are damaged.
Valve bore is badly scratched.
Valve body damaged by heat.
Foreign objects stuck between the diverters and
the body.
Replace valve.
Replace valve.
Service valve (see page 3).
Replace end cap or diverter.
Service valve (see page 3).
Replace valve.
Replace end-cap.
Service valve (see page 3).
Lubricate seals frequently. If it is still hard to
actuate, replace the valve.
Replace valve.
Service valve (see page 3).
Valve Dimensions
17.4
3.5
SPIGOT FOR
3" PVC COUPLING
9.5
3.4
7.5
3.4
3.5
8.1
12.175
6.100
4.2
FullFloXF™ Backwash Valve Installation and User’s Guide
Replacement Parts
10
9
6
8
7
11
3
2
1
5
4
14
Head Loss-Ft.
FullFloXF HeadLoss Curve-Backwash Mode
0
10
20
30
40
50
60
70
80
Head Loss-Ft.
262507, 262508, 263080, 263081
262509, 262511, 262512
0.0
5.0
10.0
15.0
20.0
25.0
30.0
0
2
4
6
8
10
12
14
050100150200250300
Head Loss,Ft.
FullFloXF ValveHead Loss Curves -Filter Mode
7
Item
No.
Part
No.
Description
1270187zHandle
2270190zEnd Cap, 2 required
3270197zO-Ring #2-244 Buna
(two required)
4192039O-Ring #2-116 Buna
(two required)
5270199zOutlet Diverter
6270200zInlet Diverter
7274426zPentair Union Assembly
8274416zCenter Diverter
9274417zWaste Seal
10274421zWaste Seal Spring
11274494O-Ring #2-332 Buna
12261067zSta-Rite Union Assembly
13U9-362O-Ring #2-231 Buna
14411101zXF Union Kit
(Not Shown)
-270514zRebuild Kit: Items 3
(Qty. 2), 4 (Qty. 2), 5, 7, 10
-270513zO-Ring Kit: Items 3 (Qty.
2), 4 (Qty. 2)
12
13
Valve Head Loss Curves
Head Loss Curve - Filter Mode
Head Loss Curve - Filter Mode
Pressure Drop - PSI
Flow Rate - GPM
FullFloXF™ Backwash Valve Installation and User’s Guide
(2” plumbing)
(3” plumbing)
40
35
30
25
20
15
Head Loss - Ft.
10
Pressure Drop - PSI
5
0
050100150200250
Head Loss Curve - Backwash Mode
Flow Rate - GPM
Backwash Head Loss Curve
80
70
60
50
40
30
Head Loss - Ft.
20
10
0
8
Valve & Filter Connection Guide
PENTAIR
P/N 263081
Filter Inlet- BOTTOM
Filter P/NPentair Filters
180006FNS Plus FNSP24
180007FNS Plus FNSP36
180008FNS Plus FNSP48
180009FNS Plus FNSP60
STA-RITE
P/N 262508P/N 262512
Filter P/NSta-Rite Filters
S7D75System 3 DE Filter
S8D110System 3 DE Filter
S7S50System 3 Sand Filter
S8S70System 3 Sand Filter
XF FILTERS
Filter P/NXF Filters
188626XF Q-60 DE
188627XF Q-80 DE
188613XF Q-100 DE
188616XF Q-120 DE
Filter P/NXF Filters
188618XF F-36 DE
188619XF F-48 DE
188620XF F-60 DE
188621XF F-72 DE
PENTAIR
P/N 263080
Filter Inlet - TOP
Filter P/NPentair Filters
188592Quad DE 60
188593Quad DE 80
188594Quad DE 100
140212TR 60 Sand
140236TR 40 Sand
Filter P/NPentair Filters
140264TR 60 Sand
140210TR 100 Sand
140243TR 140 Sand
140335TR 100 HD
140315TR 100C Sand
Filter P/NSta-Rite Filters
PLDE 36System 2 Mod DE
PLDE48System 2 Mod DE
S7MD60System 3 Mod DE
S7MD72System 3 Mod DE
STA-RITE
P/N 262507
140249TR 50 Sand
FullFloXF™ Backwash Valve Installation and User’s Guide
1620 Hawkins Ave., Sanford, NC 27330 • (919) 566-8000
10951 West Los Angeles Ave., Moorpark, CA 93021 • (805) 553-5000
This document is subject to change without notice.
FullFloXF
and/or its afliated companies in the United States and/or other countries. Weld-On® is a registered trademark of IPS Corporation and
Dow Corning® is a registered trademark of Dow Corning Corporation. Unless noted, names and brands of others that may be used in this
document are not used to indicate an afliation or endorsement between the proprietors of these names and brands and Pentair Water
Pool and Spa, Inc. Those names and brands may be the trademarks or registered trademarks of those parties or others.
P/N 270505 Rev. B 4/19/12
™
, Sta-Rite®, and Pentair Water Pool and Spa® are trademarks and/or registered trademarks of Pentair Water Pool and Spa, Inc.
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