UNITED Tower-Flo TFH Series Owner's manual

for
Series
TFH
Water Filter Systems
TOWER-FLO®Division
United Industries, Inc.
P. O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
TECHNICAL MANUAL
Complete information for
Engineering, Installation, Operation & Maintenance
of Tower-Flo®Series TFH Water Filter Systems
1

Index
2
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH:INDEX:2/17
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Series
TFH
Form ID Current Description Page
TFH-INDEX ...........................2/17.......... Index............................................................................................................................... 2
WARR....................................1/10.......... Warranty ......................................................................................................................... 3
REG.......................................1/10.......... Warranty Registration ..................................................................................................... 4
TFH-DESC ............................2/17.......... System Description......................................................................................................... 5
TFH-PSP ...............................2/17.......... Project Specifications .................................................................................................. 6-8
TFH-C&D-18..........................5/16.......... Components & Dimensions, 18" Filter ...........................................................................9
TFH-C&D-2430......................5/08.......... Components & Dimensions, 24" & 30" Filter................................................................ 10
TFH-C&D-36..........................4/14.......... Components & Dimensions, 36" Filter ..........................................................................11
TFH-182430CURVE..............2/07.......... Pump Curves, TFH-18, -24, and -30............................................................................ 12
TFH-36CURVE......................4/13.......... Pump Curve, TFH-36 ................................................................................................... 13
TFH-ELEC-3PH.....................4/14.......... Electrical Schematic, Three Phase............................................................................... 14
CONDINT ..............................2/17.......... Conductivity Interface ................................................................................................... 15
TFH-PTS-MC.........................4/13.......... Parts, Major Components............................................................................................. 16
TFH-PTS-SPM ....................11/07.......... Parts, Strainer, Pump & Motor TFH-18, -24, and -30................................................... 17
TFH-BW-OPS......................10/02.......... Backwash Options........................................................................................................ 18
TFH-FWBW...........................2/03.......... Fresh Water Backwash from Municipal Supply Schematic.......................................... 19
INISS .....................................4/98.......... Installation Issues ......................................................................................................... 20
SWEEP..................................4/98.......... Basin Sweeper Piping .................................................................................................. 21
TFH-INSTAL1/4 ...................11/07.......... Installation Instructions ................................................................................................. 22
TFH-INSTAL2/4 ...................11/07.......... Installation Instructions ................................................................................................. 23
TFH-INSTAL3/4 .....................4/14.......... Installation Instructions ................................................................................................. 24
TFH-INSTAL4/4 ...................11/07.......... Installation Instructions ................................................................................................. 25
TFH-START...........................4/14.......... Start Up Instructions ..................................................................................................... 26
................................................................ Blank............................................................................................................................. 27
TFH-OPER1/2 .......................3/13.......... Operating instructions, Page 1 ..................................................................................... 28
TFH-OPER2/2 .....................11/08.......... Operating instructions, Page 2 ..................................................................................... 29
TFH-MNTN..........................10/01.......... Maintenance instructions.............................................................................................. 30
TF-MEDINSP.......................10/01.......... Media Inspection Instructions....................................................................................... 31
TFH-WINT ...........................10/95.......... Winterization Instructions ............................................................................................. 32
TFH-TS................................10/95.......... Trouble Shooting .......................................................................................................... 33

3
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form WARR:1/10
Warrant only to _____________________________________________________________,
the original retail purchaser, that the products which are manufactured by United Industries, Inc. are free from defects in material
and/or workmanship for a period of twelve months from the date of documented installation or, in absence of documented instal-
lation date, 12 months from the date of factory shipment. The warranty registration card in this manual MUST be completed and
returned to United Industries, Inc. in order to establish the date of installation and extend the warranty period. If, within the period
provided by this warranty, any such product shall prove defective, it shall be either repaired or replaced.
For repair/replacement, the original retail purchaser shall first contact the installing dealer, as soon as possible after discovery of
the defect, but in all events prior to the expiration date of the warranty. Upon notification by the dealer, United Industries, Inc., 202
East Cleveland, Sterling, Kansas 67579 will advise the purchaser of the address to which the defective item may be shipped. The
serial number and the date of purchase of the item must be included. Regular UPS cost for shipping replacement part(s) to the
customer will be borne by United Industries, Inc.; shipping other than regular service will be at the customer’s expense. Customer
is responsible for cost of shipping defective part(s) back to United Industries.
If an installing dealer was not involved, then the customer should contact United Industries, Inc.
EXCLUSIONS
1. This warranty shall not apply to any failures resulting from: negligence, abuse, misuse, misapplication, improper installation,
alteration or modification, chemical corrosion, or improper maintenance.
2. Any items manufactured by other companies and used by United Industries in its products may carry warranties by the original
manufacturers.
3. United Industries is not liable for incidental or consequential damages, loss of time, inconvenience, incidental expenses, labor
or material charges in connection with removal or replacement of the equipment.
United Industries is not responsible for any implied warranties or representations by others, and the foregoing warranty is exclu-
sive and in lieu of all warranties provided herein. Some states do not allow the exclusion or limitation of incidental or consequen-
tial damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may
also have other rights which vary from state to state.
IMPORTANT
Read and fully understand the WARNING labels on the equipment. DO NOT OPERATE this unit if any unsafe conditions exist.
UNITED INDUSTRIES, INC.
TOWER-FLO®LIMITED WARRANTY
WARNING
THIS FILTER SYSTEM OPERATES UNDER PRESSURE. DO NOT OPEN WHILE PUMP IS RUNNING AND/OR
UNTIL ALL PRESSURE IS RELEASED THROUGH AIR RELIEF VALVE. SECURELY TIGHTEN VESSEL AND
STRAINER CLAMP ASSEMBLIES ACCORDING TO MANUFACTURER’S INSTRUCTIONS. RAISE PRESSURE
SLOWLY. DO NOT EXCEED THE MAXIMUM WORKING PRESSURE OF THE VESSEL.
DANGER! EXTREME CARE MUST BE TAKEN DURING PRESSURE TESTS. FAILURE TO FOLLOW THESE
INSTRUCTIONS EXPLICITLY CAN RESULT IN PERSONAL INJURY.
Filter Model Number _________________________________ Filter Serial Number _________________________________
Total Filter Surface Area ______________________________ Filtration Rate: Maximum 20 GPM/ft2of Filter Surface Area
Required clearance for service and maintenance: Vertical height ________________ Horizontal width ________________
Filter Flow Rate GPM: Filtration ______________ Backwash _______________ Maximum Working Pressure ___________
Continuous sidestream filtration for removal of suspended solids is one, very important portion of a total water quality manage-
ment program, which should also include the services of competent water treatment professionals for proper control of water
hardness, pH, and biological contaminants.

4
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form REG:1/10:
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
WARRANTY
REGISTRATION
Congratulations on your selection of a TOWER-FLO®Water Filter System by United Industries, Inc.!
Your TOWER-FLO Filter is designed and manufactured for years of virtually maintenance-free service. As with any
mechanical equipment, however, components can and do fail. If you ever have a problem, Tower-Flo is committed
to supporting you and helping you get your filter back in operation as soon as possible, whether it remains under
warranty or not.
Your TOWER-FLO Filter is covered by a limited warranty as stated on the previous page. This warranty is for 12
months from the date of documented installation or, in the absence of documented installation date, 12 months from
the date of factory shipment. In order to receive the maximum warranty benefit, you must complete and return
the Warranty Registration Card below within 10 days of installation to register your warranty and ensure
your warranty rights. Failure to complete and return this Warranty Registration Card will result in your warranty
being limited to 12 months from the date of factory shipment.
EXTEND YOUR WARRANTY!
COMPLETE AND RETURN THIS WARRANTY REGISTRATION CARD WITHIN 10 DAYS OF
INSTALLING YOUR FILTER TO EXTEND YOUR WARRANTY PERIOD!
Manufacturer’s Warranty Registration Card
Filter Serial Number: __________________________________________________________________
Purchased by: Company: ______________________________________________________________
Address: ______________________________________________________________
City: ______________________________ State: ____ Zip: _____________
Contact Person: _________________________ Phone: _______________________
Date of Installation: ___________________________________________________________________
Complete the card below. Cut along dotted line. Return to:
Warranty Registration
Tower-Flo Filter Division
United Industries, Inc.
P. O. Box 58
Sterling, KS 67579
For Your Records
Date of Installation ___________________ Date Warranty Registration Card Mailed ______________

5
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form TFH-DESC:2/17
Description
Series
TFH
The information below provides a general description of the main components of Series TFH filter systems. Details
of standard, optional, and additional components are found in the Project Specifications document, on the follow-
ing pages.
MAIN COMPONENT DESCRIPTION
A. HIGH RATE SAND FILTER VESSEL
This permanent media, high-rate sand filter is a vertical pressure vessel constructed of epoxy lined carbon steel
designed for a maximum working pressure of 100 psi with a special influent baffle in the top of the tank, a bed of
filter sand and a mechanical underdrain system which collects the filtered water and directs it to the return piping
system. The filter operates under pressure. When closed properly and operated without air in the water system, this
filter will operate safely. The system is equipped with an automatic air relief valve and 0-160 psi influent and effluent
pressure gauges mounted in a common panel.
B. VALVE ASSEMBLY
The valves are brass, 3-way ball valves with a single, 24VAC electric actuator and mechanical linkage.
C. CONTROL PANEL
The control panel provides all controls for automatic backwash operation. The standard control panel is UL®and
cUL® Labeled in a NEMA 4X corrosion resistant fiberglass enclosure. Backwash is initiated by: 1) differential pres-
sure switch (external to the enclosure); 2) manual backwash pushbutton on face of control panel; or, 3) 100 hour
“re-setting” timer (∆P switch closure or manual initiation resets timer) for backup initiation. The sequence of the
operation is described under the Operation section of this manual. The controls automatically stop the system’s
pump whenever valves are to be shifted which prevents water hammer, pipe flexing, and the risk of damage to col-
lection laterals in the vessel. Standard control panels include five sets of dry contacts for BMS interface: 1) alarm on
repeat backwash; 2) remote pump on/off with HOA switch; 3) remote indication of common alarm (motor trip indica-
tion; 4) remote indication of backwash operation; 5) remote initiation of backwash; and 6) conductivity interface.
D. PUMP
The pump on Models TFH-18, -24, and -30 is self-priming and has a cast brass impeller, motor bracket, and volute
with stainless steel fasteners to resist corrosion. The drip-proof, cool running, mechanical seal virtually eliminates
burnout and provides easy access for replacement. The pump on Models TFH-36 is flooded suction and has
machined cast iron volute, bronze fittings.
E. MOTOR
The totally enclosed motor with its external fan-cooled construction allows for operation in noncombustible, dusty,
dirty atmospheres. It is double shielded with prelubricated ball bearings on both ends, a high tensile steel shaft,
enclosed in a heavy gauge rolled steel case and is rated at a service factor of 1.15 at 40˚ C over ambient. Motors
are UL approved and CSA stamped.
F. STRAINER
The pump suction strainer assembly on Models TFH-18, -24, and -30 has a cast brass body, brass lid, and a cyco-
lac strainer basket. The lid is held in place by two brass lockhandles and includes and o-ring for postive seal.
The pump suction strainer on Model TFH-36 has a cast iron body; stainless steel basket; cast iron cover with gasket,
held in place with a yoke and bolt clamp.
G. MEDIA
Filter media is shipped with the unit for field installation. The filter media is quartzite or silica with a relative size of
.45 to .55 mm. Clean filter media will remove particles 20 microns in size and larger. Accumulated material on the
top of the media bed, called a filter cake, contributes to finer particle removal as the filter becomes “dirtier”. Removal
of over 99% of 10 micron particles and 90% of 5 micron particles can be expected over the course of a filter cycle.

Project Specications
6
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH-PSP-1/3:2/17
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Series
TFH
TOWER-FLO® Series TFH self-contained filter plants shall consist of the following major components: base, pump, motor,
strainer, facepiping, valve, controls, and filter vessel. The system shall be shipped as a complete factory assembled and tested
unit. Filter media shall be shipped with the unit for field installation.
Project: ________________________________________________________ Date: ______________________
The TOWER-FLO Series TFH Model being specified for this project is a TFH-____ with a maximum filter rate of _____ GPM.
___ unit(s) is(are) specified and each unit shall be equipped with the following components:
COMPONENT SPECIFICATION
BASE ___ Standard: Structural steel channel and plate, primed and coated.
PUMP ___ Standard: TFH-18, -24, -30: Self-priming, close grain cast and machined brass volute, impeller, and pump-to-
motor coupling; close coupled to the motor; and capable of ____ GPM at ____ feet TDH.
___ Standard: TFH-36: Flooded suction, machined cast iron volute, bronze fitted, close coupled to the motor
and capable of ____ GPM at ____ feet TDH.
___ Option: TFH-36: Self-priming pump, machined cast iron volute, bronze fitted, close coupled to the motor
and capable of ____ GPM at ____ feet TDH.
MOTOR ___ Standard: TFH-18, -24, -30: TEFC, heavy gauge rolled steel case, NEMA 56C frame, Class F insulation,
double shielded prelubricated ball bearings; UL®and CSA®listed; ____ HP; and at the follow-
ing VAC, phase and Hz: ___________________.
___ Standard: TFH-36: TEFC, heavy gauge rolled steel case, NEMA 145JM frame, Class F insulation, double
shielded prelubricated ball bearings; UL®and CSA® listed; ____ HP; and at the following VAC,
phase and Hz: ___________________.
___ Option: 575V.
STRAINER ___ Standard: TFH-18, -24, -30: Basket type, brass body, ABS basket, brass cover with o-ring, held in place
by two brass lockhandles.
___ Option: TFH-18, -24, -30: Delete strainer on installations where inlet pressure exceeds 30PSI.
___ Standard: TFH-36: Cast iron body; stainless steel basket; cast iron cover with gasket, held in place with a
yoke and bolt clamp (60 PSI @ 150˚ F).
FACEPIPING ___ Standard: Steel; backwash sight glass; influent / effluent pressure gauges, 0-160 psi, liquid-filled
___ Option: Type 304 Stainless Steel (with brass or stainless steel valves).
___ Option: Fresh water backwash from municipal water supply; includes facepiping modifications, flow
control valve for field installation; end-user responsible for the addition of pressure regulator
(maximum 30 psi) and/or backflow preventer, if required.
___ Option: Fresh water backwash from static water supply using pump to assist.
VALVES ___ Standard: Brass, 3-way ball valves, with electric actuation.
___ Option: Stainless steel (with steel or stainless steel facepiping).
141 GPM MAX FLOW RATE 100 PSI WORKING PRESSURE
Model Base HP Max TDH Full Load Amp Draw Media Operating
Number Dimensions GPM Ft. Single Phase Three Phase Area Vol Weight
S.F. 115V 208V 230V S.F. 208V 230V 460V SqFt CuFt* in Lbs
TFH-18 16.75" x 38" 1 35 65 1.15 12.0 6.6 6.0 1.15 3.2 3.6 1.8 1.8 4.0
TFH-24 22" X 46" 1.5 65 50 1.0 17.0 8.8 8.5 1.15 4.4 4.2 2.1 3.14 7.0 2488
TFH-30 26" X 52" 3 100 45 1.0 - 14.0 14.2 1.15 8.1 8.0 4.0 5.0 9.0 2957
TFH-36 30" X 58" 3 141 45 1.15 - - - 1.15 9.1 8.3 4.1 7.0 14.0 3910
*1 Cubic foot of media = 100 lbs.
✔
✔
✔
✔
✔
✔

7
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form TFH-PSP-2/3:2/17
Project Specications
Series
TFH
COMPONENT SPECIFICATION
CONTROLS ___ Standard: Three phase or single phase, Automatic backwash control panel, UL®and cUL®Labeled, in
a NEMA 4X fiberglass enclosure including: motor starter with thermal overload and short circuit
protection; fuseless branch and control circuit protection; transformer to convert primary supply to
24 and 120 VAC control power; through-the-door disconnect; programmable relay with program of
operation, 7-year battery backup and external memory card backup; HOA switch for pump motor;
differential pressure switch (external to the enclosure) for primary backwash initiation; manual
backwash initiation pushbutton; backwash counter; and contacts for ∆P repeat closure shut-off and
alarm, common alarm (motor trip indication), remote indication of backwash operation, remote
backwash initiation, and conductivity interface. Program features 30-second time delay in ∆P
switch circuit and 100 hour “re-setting” timer (∆P switch closure or manual initiation resets timer)
for backup backwash initiation.
___ Option: Backwash lockout between/among ____ units; to prevent simultaneous backwash of multiple
filter units; 0-60 minute adjustable lockout time delay program; field connection between/
among control panels by others.
___ Option: Contacts for connection to BMS, additional specifications required from owner.
___ local (lights) and remote (contacts) indication of filter or backwash operating mode.
___ other (be specific) _____________________________________________________.
___ Option: Manual backwash; ___ single-phase; ___ three-phase.
VESSEL ___ Standard: ___" diameter, carbon steel; interior tank coating of 15-18 mil two-part epoxy; exterior tank
primer of two-part epoxy after wire brush cleaning; exterior finish coating of two-part industrial
and marine grade polyurethane; Schedule 80 PVC and molded cycolac internals; TFH-18 has
removable top head for internal access with gasketed flange rings, bolts and nuts; TFH-24,
-30, -36 have 14" X 18" access manway; 4" X 6" handhole; 100 psi working pressure; fitted
with tank drain, influent and effluent pressure gauges, automatic air relief valve. Maximum flow
rate _______ GPM at 20 GPM per square foot filter surface area.
___ Option: Type 304 stainless steel
___ Option: working pressures to 150 psi.
___ Option: Uniflex™ heat set PVC interior vessel lining, 60-90 mil finish thickness, 15 year limited vessel warranty.
MEDIA ___ Standard: Quartzite or silica in nature, hard, not smooth, uniformity coefficient of 1.7, relative size of .45
to .55 mm, containing no more than 5% flat particles or more than 1% clay, loam dust, or other
foreign material. Media weighs 100 lbs per cubic foot.
✔
✔
✔

Project Specications
8
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH-PSP-3/3:2/17
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Series
TFH
COMMON ADDITIONAL EQUIPMENT:
NOZZLES ___ Sweeper-Eductor Nozzle, 1/4" MPT, ABS plastic, quantity of _____.
HOLDERS ___ Clip-On Nozzle Holder, quantity of _____; for ___ 1-1/4"; ___ 1-1/2"; or ___ 2" PVC pipe.
SURGE TANK ___ Polyethylene tank for backwash surge capture and gravity release to closest drain:
______ gallon capacity, ____" diameter x ____" high, with a ____" diameter lid in top head and a 2" FPT
drain bulkhead fitting.
___ Bulkhead fitting, additional, for inlet from filter ___ 2", ___3", or ___ 4", for field installed by others;
___ Manual ball valve, 2", 2-way, , ___ Sch 40 PVC, ___ Sch 80 PVC, ___ brass, for field installation by oth-
ers on drain piping from tank for isolation and/or throttling.
LIQUID LEVEL ___ Liquid level control assembly for backwash surge tank to interrupt filter pump if/when surge tank nears
capacity. Includes: ITT McDonnell-Miller 750B liquid level controller mounted in separate NEMA 3R enclo-
sure requiring separate 120 V power supply factory mounted on filter’s control panel bracket (unless oth-
erwise specificed); sensor; 3 trimmable probes (L, H, and Ground); field wiring from sensor to LLC enclo-
sure by others. Also includes additional contacts for remote pump on/off in filter control panel.
___ Liquid level control column assembly; 2” Sch 80 piping assembly mounted on side of poly tank to
isolate liquid level probes from turbulance in poly tank.
SOLENOID VALVE ___ Solenoid valve, for backwash siphon break, _____", bronze, with 24 VAC solenoid.
NOTE: Backwash flow rate, irrespective of water source, must be no less than 75% and no greater than 100% of the vessel's
designed maximum gpm. Backwash duration is factory preset at 3 minutes and is field adjustable.

9
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form TFH-C&D-18:5/16
TFH-18
Components & Dimensions
Series
TFH
PRE-STRAINER
∆P SWITCH
AUTO AIR
RELIEF VALVE
GAUGE PANEL
CONTROL PANEL
BALL VALVE,
BRASS, 3-WAY
BACKWASH
TO WASTE
FILTER
EFFLUENT
FILTER
INFLUENT
VALVE ACTUATOR
WITH LINKAGE
DRAIN
HANDHOLE
PUMP MOTOR
VESSEL
c C
F
E
G
H
D
bB
a
A
TFH-18 DIMENSIONS
Influent Connection 2" FPT
Effluent Connection 2" FPT
Backwash Connection 2" FPT
A Vessel OD .............................18”
aFlange OD............................. 24”
BOverall Length....................... 41”
bBase Length..........................38"
COverall Width ........................25"
cBase Width.......................16.75"
D Vessel to Influent ¢ ...............19”
E Grade to Influent ¢ .............14.5"
F Grade to Effluent Valve ¢......24"
G Eff Valve ¢ to BW Valve ¢.....15"
HOverall Height ....................61.5"
NOTE: All dimensions are approxi-
mate and must be field verified.

TFH-24 & TFH-30
Components & Dimensions
10
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH-C&D-2430:5/08:
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Series
TFH
PRE-STRAINER
∆P SWITCH
AUTO AIR
RELIEF VALVE
GAUGE PANEL
CONTROL PANEL
BALL VALVE,
BRASS, 3-WAY
BACKWASH
TO WASTE
FILTER
EFFLUENT
FILTER
INFLUENT
VALVE ACTUATOR
WITH LINKAGE
DRAIN
HANDHOLE
PUMP MOTOR
VESSEL
c C
F
E
G
H
D
bB
A
DIMENSIONS 24 30
Influent Connection 2" FPT
Effluent Connection 2" FPT
Backwash Connection 2" FPT
A Vessel OD .............................24” 30"
BOverall Length....................... 49” 55"
bBase Length..........................46" 52"
COverall Width ........................28" 34"
cBase Width............................22" 26"
D Vessel to Influent ¢ ...............19” 19"
E Grade to Influent ¢ ................12" 12"
F Grade to Effluent Valve ¢...20.5" 20.5"
G Eff Valve ¢ to BW Valve ¢.....15" 15"
HOverall Height .......................59" 65"
NOTE: All dimensions are approximate
and must be field verified.

11
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form TFH-C&D-36:4/14
TFH-36
Components & Dimensions
Series
TFH
PRE-STRAINER
∆P SWITCH
AUTO AIR
RELIEF VALVE
GAUGE PANEL
CONTROL PANEL
BACKWASH
TO WASTE
FILTER
EFFLUENT
FILTER
INFLUENT
DRAIN
HANDHOLE
PUMP MOTOR
VESSEL
c
C
F
E
G
H
D
bB
A
TFH-36 DIMENSIONS
Influent Connection 2.5" Flanged
Effluent Connection 2" FPT
Backwash Connection 2" FPT
A Vessel OD .............................36”
BOverall Length....................... 62”
bBase Length..........................58"
COverall Width ........................40"
cBase Width............................30"
D Vessel to Influent ¢ ............20.5”
E Grade to Influent ¢ ................ 11"
F Grade to Effluent Valve ¢...19.5"
G Eff Valve ¢ to BW Valve ¢.....15"
HOverall Height .......................61"
NOTE: All dimensions are approxi-
mate and must be field verified.
BALL VALVE,
BRASS, 3-WAY
VALVE ACTUATOR
WITH LINKAGE

Pump Curve - 18, 24, 30
12
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH182430CURVE:2/07
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Series
TFH
PERFORMANCE CURVE
CAPACITY IN GALLONS PER MINUTE
Curve based on 3450 RPM impeller speed. 50 cycle units available.
TFH-30
TFH-24
TFH-18

13
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form TFH36CURVE:4/13
Pump Curve - 36
Series
TFH
Pump Data Sheet - AURORA PUMPS
Company: TOWER-FLO
Name: DAVID NASH
Date: 4/23/2013
TFH-36
Pump:
Size: 2x2.5x7A
Type: 340 1 STG ENDSUC Speed: 1750 rpm
Synch speed: 1800 rpm Dia: 6.75 in
Curve: PC116283 Impeller:
Specific Speeds: Ns: 1255
Nss: 6476
Dimensions: Suction: 2.5 in
Discharge: 2 in
Pump Limits:
Temperature: 300 °F Power: ---
Pressure: 175 psi g Eye area: ---
Sphere size: 0.375 in
Search Criteria:
Flow: 141 US gpm Head: 45 ft
Fluid:
Water Temperature: 60 °F
SG: 1 Vapor pressure: 0.2563 psi a
Viscosity: 1.105 cP Atm pressure: 14.7 psi a
NPSHa: ---
Motor:
Size: 3 hp
Speed: 1800
Frame: 182T
Standard: NEMA
Enclosure: TEFC
Sizing criteria: Max Power on Design Curve
Selected from catalog: Aurora Pumps.60 Vers: 4.3
---- Data Point ----
Flow: 141 US gpm
Head: 44.8 ft
Eff: 73%
Power: 2.18 hp
NPSHr: 4.59 ft
---- Design Curve ----
Shutoff head: 50.9 ft
Shutoff dP: 22 psi
Min flow: ---
BEP: 73% @ 149 US gpm
NOL power:
2.96 hp @ 223 US gpm
-- Max Curve --
Max power:
2.96 hp @ 223 US gpm
Curve efficiencies are typical. For guaranteed values, contact Aurora Pump or your local distributor. Las eficiencias en
curvas son tipicas. Para valores garantizados contacte a Aurora Pump o a su distribuidor local.
US gpm
NPSHr - ft
220200180160140120100806040
020
10
20
Head - ft
220200180
0160140
10
120
20
100
30
8060
40
40
50
20
73.1
6.75 in
6.75 in
4.5 in
0.75 hp 1 hp
1.5 hp
2 hp
3 hp
30
30
40
40
50
50 50
50
55
55
60
60
65
65
70
70
73
73
Performance Evaluation:
Flow Speed Head Efficiency Power NPSHr
US gpm rpm ft %hp ft
169 1750 40.9 72 2.41 6.66
141 1750 44.8 73 2.18 4.59
113 1750 47.7 69 1.98 3.68
84.6 1750 49.7 61 1.75 2.9
56.4 1750 50.6 48 1.51 2.19

Electrical Schematic
Three Phase
Series
TFH
14
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH-ELEC-3PH:2/17
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
RED
X1
TFH SERIES FILTERS CONTROL TERMINAL WIRING
DIFFERENTIAL PRESSURE SWITCH
ACTUATOR, I/O SWITCH ON POSITION “I”
WHITE WHITE WHITE BLACK
1 5
14 15
X3 X3 X3
16 17 17
NOTES: 1. Trip block will be selected in accordance with Table 1. 2. Main disconnect and branch circuit protection must
be sized in accordance with trip block selected.
3. Primary supply taps to transformer will be connect-
ed per primary voltage stated for order.
NOTE: STANDARD SCHEMATIC SHOWN.
OPTIONS WILL CHANGE THIS SCHEMATIC

15
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form CONDINT:2/17
Conductivity Interface
Series
TFW
Conservation of the world’s freshwater resources is a growing global concern. Tower-Flo, recognizing the contribution its solids
removal devices for condenser water systems make to waste water streams, announces a new “conductivity interface” feature
included in its control panels. This feature establishes an interface capability with an automatic water treatment controller designed
to permit that controller to:
• prevent the backwash of a filter or the purge of a separator;
• initiate the backwash of a filter or the purge of a separator; and
• receive a signal from the filter or separator controls indicating each time a backwash or purge occurs.
Tower-Flo’s new conductivity interface feature overcomes one of the most commonly raised objections about filters and separators
for condenser water systems - “backwash and purge wastes too much expensively treated water”.
Tower-Flo’s new conductivity interface in a sand filter control panel allows an automatic water chemistry controller to be pro-
grammed with:
• a low conductivity setpoint below which none of the three filter backwash initiation sources (ΔP switch, manual pushbutton,
100 hour backup timer) can cause a backwash; a filter backwash cannot inadvertently drive the conductivity too low.
◦ that low conductivity set point should close a dry contact wired to the available contacts in the filter’s control panel, which
will open when conductivity exceeds that low set point.
• a high conductivity setpoint that will initiate a backwash;
◦ that setpoint should be higher than the setpoint controlling the water treatment blowdown valve;
◦ filters deliver their best particle retention when they are at their dirtiest; consequently, the filter should never be considered
as the primary blowdown device;
•use the signal of a backwash to cause the addition of a pre-set volume to a totalized volume of water going to waste.
With Tower-Flo’s conductivity interface in a centrifugal separator control panel, an automatic water chemistry controller can control
the separator’s purge valve the same way it would control a blow-down valve.
This feature is now standard in control panels for Tower-Flo sand filter Series TFW, TFH & TFB. This feature is an option now
available on Tower-Flo centrifugal separator Series TFSP and the optional automatic purge for Series TFS, and will become stan-
dard in the very near future.

Parts
Major Components
16
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH-PTS-MC:4/13
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Series
TFH
TFH-18, top head gasket
M846219 Gasket, 18" round
Manway, 11" x 15" (until 11/07)
M846310 Manway cover, 11" x 15"
M846361 Top assembly, 11x15
Manway. 14" x 15" (11/07 to present)
F000005 Gasket, 14” x 18" manway
M846396 Top assembly, 14x18 manway
Hand hole
M846181 Gasket, hand hole, 4x6
M846185 Top assebmly, 4x6 hand hole
Top assembly = Cover, yoke, bolt and gasket
Pressure Gauges, 2 required
P181045H Gauge, pressure, 0-100 PSI, 3.5"
(standard gauges)
P181045L Gauge, pressure, 0-60 PSI, 3.5"
P181045T Gauge, pressure, 0-160 PSI, 3.5"
Valve & Actuator
M870330K Valve, ball, 3-way, brass, 2"
M870377 Actuator, electric, 24 VAC
M870376K Actuator mounting kit
14" X 18" MANWAY
PUMP PRE-STRAINER
AUTO AIR RELIEF VALVE
BRASS 3-WAY
BALL VALVE
GAUGE PANEL
CONTROL PANEL
BACKWASH
TO WASTE
FILTERED
WATER
RETURN
VALVE ACTUATOR
WITH LINKAGE
VESSEL DRAIN
HANDHOLE
PUMP MOTOR

17
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form TFH-PTS-SPM:11/07
Parts
Strainer, Pump, & Motor
Series
TFH
Item Part # Description Qty
1 P263165 Lockhandle, brass 2
2 Z010830 Trap cover, bronze, 5" 1
3 P171977 Trap cover, O-ring 5" 1
4 P171005 Basket, strainer 5" 1
5 P170422 Trap body, bronze, 5" x 2" 1
7 P263171 Plug volute and/or trap 2
8 M808698 Bolt, trap to volute 4
9 P171915 Pump base 1
10 P171917 Lockwasher 2
Item Part # Description Qty
11 P171920 Hex bolt 5/16-18 x 3/4 2
12 P170415 Gasket, trap to volute 1
14 P170417 Volute 1
16 P171976 Seal 1
17 P171974 Gasket, volute 1
18 P171903 Hex bolt, 3/8-16 x 5/8 4
19 P170420 Bracket 1
20 P171902 Hex bolt, 5/16-18 x 5/8 8
21 P171901 Screws, set 3
22 P171904 Shaft extension 1
Uncommon Part Numbers
TFH-18 TFH-24 TFH-30
15 P171971 P171972 P171973 Impeller 1
23 P171922 P171938 P171983 Pump assembly, (items 9-22) 1
24 P171942 P295056 P171541 Motor, three phase, TEFC 1
Common Part Numbers for TFH-18, -24, and -30

Backwash Options
18
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH-BW-OPS:10/02:
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Series
TFH
TOWER-FLO®Filters are equipped to automatically back wash using water from the same source they are filtering. In the
vast majority of sidestream applications this is perfectly satisfactory. However, in some cases it is not desirable to dispose
of system water for filter backwashing. In those cases, TOWER-FLO offers two alternative approaches as described below.
FRESH WATER BACKWASH FROM MUNICIPAL SUPPLY
This option uses municipal water supply for backwashing. When the filter’s differential pressure switch activates backwash,
the system pump is stopped for the duration of the backwash operation and a valve is opened to allow city water to back-
wash the vessel. The flow rate and pressure of the city water supply must be controlled so as not to exceed the limits of
the vessel; conversely, the flow rate must meet the vessel’s minimum backwash flow requirement of 75% of flow rate.
Ordering this option changes the facepiping from the standard configuration (as shown on pages 9, 10 & 23) to the
configuration shown on the following page. Municipal water supply is connected to the bottom valve as shown.
Additionally, this option provides a flow control valve, factory preset to the maximum flow rate of the vessel, to be
installed on site in the municipal water supply line to the filter. The end-user is responsible for the addition of a
pressure-controlling device in the fresh water supply line set to a maximum 30 psi. Local code may also
require the addition of a back flow preventer in the fresh water supply line.
FRESH WATER BACKWASH FROM STATIC SUPPLY, PUMP ASSISTED
This option uses some totally independent, static pressure water supply (such as an accumulation vessel) for back-
washing and relies on the system pump to create the backwash flow. This option is useful when it is not desirable to
backwash with system water and municipal supply is either not available or cannot meet the minimum flow requirement.
Ordering this option provides an additional three-way valve mounted to the suction port on the pump pre-strainer.
The three-way valve is normally open on the suction line from source and closed to the backwash water source. It
switches position simultaneously with the two backwash control valves.

19
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Form TFH-FWBW:2/03
Series
TFH
Series
TFH Option - Fresh Water Backwash
from Municipal Water Supply
INSTALLATION SEQUENCE - FRESH WATER BACKWASH FROM MUNICIPAL SUPPLY
This option changes the facepiping from the standard configuration (as shown in drawings elsewhere) to the con-
figuration shown above. Included with this option is a flow control valve for field installation. The end-user is respon-
sible for the addition of a pressure-controlling device in the municipal water supply line set to a maximum
30 psi. Local code may also require the addition of a back flow preventer in the municipal water supply line.
Municipal water supply is connected to the top port of the bottom valve. The additional equipment required to control
the pressure and flow of municipal water supply to the filter system should be installed in the following sequence
from source toward the filter’s bottom valve: 1) back flow preventer (by others); 2) pressure controlling device set to
maximum 30 psi (by others); 3) flow control valve 2” (provided by TF) set at either • 28% for TFH-24 at 65 gpm, •
20% for TFH-30 at 100 gpm. • or 13% for TFH-36 at 141 gpm.

Installation Issues
20
United Industries, Inc.
P.O. Box 58
Sterling, KS 67579
800-835-3272 • 620-278-3160
Fax [phone] • 620-278-3115
www.towerflo.com
Form TFH-INISS:4/98
Data presented here is the best available at the
time of publicaton. United Industries and/or its
representatives assume no liability for its use.
Series
TFH
Tower-Flo®generally recommends sidestream installation of its filter systems and its standard systems are designed and built for
sidestream application. Sidestream filtration means a filter system which draws water from and returns it to a static pressure
reservoir of water in the cooling loop, completely independent of the cooling water recirculation system. Usually, that reservoir of
water is the basin of the cooling tower or sometimes it may be a chilled water storage reservoir in the cooling loop.
However, there are occassions where a design has called for slipstream installation. Slipstream filtration means a filter which is
installed on the pressurized recirculation piping system, "slipping" a portion of the chilled water recirculation flow through the filter
system. Depending on the points of connection to the recirculation piping, the slipstream may be either under the influence of the
discharge side or the suction side of the recirculation pump.
If the filter system you are about to install is to be installed in any other fashion than sidestream, please be sure that necessary
consideration has been given to operating pressure of the filter system and flow promotion issues. If you, as the installer, have
any questions, contact your local Tower-Flo Representative or contact the Tower-Flo Water Filter Systems Division of United
Industries, Inc.
INSTALLATION STYLE
BASIN SWEEPER PIPING SYSTEM
A basin sweeper piping system will use the return flow of filtered water from the filter system to help sweep solids towards the filter's
suction point. However, it is very important to have a reasonable expectation of such a basin sweeper piping system. It must be
understood that the primary purpose of the filter system is the continuous removal of suspended solids from the water being
recirculated through the cooling loop. The basin sweeper piping system provides a secondary benefit by promoting the movement
solids across the basin floor toward the filter suction point for removal.
While such a system can reduce the time and effort required for regular basin clean-out, even the best designed sweeper piping
system cannot keep a cooling tower basin perfectly clean nor sweep effectively around all appertinances. If you plan to use a
basin sweeper piping system, please review the information on the next page to determine the proper number of nozzles or per-
forations to be used with your basin sweeper piping system.
IF YOU, AS THE INSTALLER OR OWNER OR OPERATOR, HAVE ANY QUESTIONS ABOUT ANY ASPECT OF
YOUR INSTALLATION AND/OR OPERATION OF THIS TOWER-FLO FILTER SYSTEM, CONTACT YOUR LOCAL
TOWER-FLO REPRESENTATIVE OR CONTACT THE TOWER-FLO WATER FILTER SYSTEMS DIVISION OF
UNITED INDUSTRIES, INC., BEFORE START-UP OF THIS FILTER SYSTEM.