Willoughby Industries, Inc. T4 User manual

Installation &
Operation Manual
Rev. 10/2019
Willoughby Industries, Inc.
5105 West 78th Street
Indianapolis, IN 46268
Toll Free: [phone]
Local: [phone]
Fax: [phone]
www.willoughby-ind.com MADE IN THE U.S.A.
Table of Contents
Pre-Installation Information������������������������������������� 3
General Description������������������������������������������������4
Physical Dimensions ����������������������������������������������5
Exploded-view w/BOM �������������������������������������������6
Checking Contents �������������������������������������������������7
Installation Instructions �������������������������������������������8
Care and Maintenance �������������������������������������������9
Troubleshooting Guide �����������������������������������������10
Troubleshooting Guide Diagram ��������������������������12
Warranty���������������������������������������������������������������13
T4
Toilet Overow Preventer
w/ Manual Reset
T4
(Manual-Reset)

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 2Rev. 10/2019 www.willoughby-ind.com
(Page left intentionally blank)

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 3Rev. 10/2019 www.willoughby-ind.com
INSTALLATION INSTRUCTIONS
Visit our website at http.//www.willoughby-ind.com
2210 West Morris Street • P.O. Box 21217 • Indianapolis, IN 46221
[phone] • Fax: [phone] • [phone]
© Rev. 11/2007 Page 3
Installation notice!
Check Rough-in location and flush lines prior to hook up!
When installing the Willoughby Industries’ WAW, WAF, or WWF series
washfountains or lavatory deck systems:
Before Step 1 of the installation instructions, ensure that rough-ins are in the correct
location.
It is essential that the water supply lines be thoroughly flushed prior to making final
connection to the hot and cold water supply lines. These lines must be flushed
sufficiently to remove the small particles of debris that are inherent with new
construction projects. If this debris is not removed, the valving in these units will be
damaged. Do not attempt to remove aerators to flush debris into the lavatory. The
damage can only be fixed by replacing the valves. Damage to valves caused by debris
will not be covered by the manufacturers warranty.
Installation notice!
Check Rough-in location and flush lines prior to hook up!
© Rev. 5/2010
When installing the Willoughby Industries' Top-4 Overow Preventer w/ Manual Reset:
Before step 1 of the installation instructions, ensure that rough-ins are in the correct location�
The valve assembly, including the spray head, MUST NOT BE connected until after
all lines have been ushed to remove the small particles of debris that are inherent
with new construction projects and all chemicals that are used in ushing are purged
from the system�
Chemicals used in ushing plumbing systems can attack the internal components of
the valve and spray head and severely damage them, so any ushing of the system
must be followed by a full ushing with pure water to clear any harsh chemicals
remaining in the system� Debris in the system if allowed to enter the valve assembly
and spray head can cause poor performance or outright failure�
Again DO NOT attempt to connect the valve assembly and spray head until after all
ushing is complete and pure water is the only media that will be passing through the
system� Damage to the valve assembly or spray head caused by harsh chemicals or
debris will not be covered by the manufacturer's warranty�
INSTALLATION INSTRUCTIONS
Visit our website at http.//www.willoughby-ind.com
2210 West Morris Street • P.O. Box 21217 • Indianapolis, IN 46221
[phone] • Fax: [phone] • [phone]
© Rev. 11/2007 Page 3
Installation notice!
Check Rough-in location and flush lines prior to hook up!
When installing the Willoughby Industries’ WAW, WAF, or WWF series
washfountains or lavatory deck systems:
Before Step 1 of the installation instructions, ensure that rough-ins are in the correct
location.
It is essential that the water supply lines be thoroughly flushed prior to making final
connection to the hot and cold water supply lines. These lines must be flushed
sufficiently to remove the small particles of debris that are inherent with new
construction projects. If this debris is not removed, the valving in these units will be
damaged. Do not attempt to remove aerators to flush debris into the lavatory. The
damage can only be fixed by replacing the valves. Damage to valves caused by debris
will not be covered by the manufacturers warranty.
Installation notice!
Check Rough-in location and flush lines prior to hook up!
© Rev. 5/2010
Check Rough-In location PRIOR to installation
Flush lines thoroughly PRIOR to hook-up
Check Rough-In location PRIOR to installation
Flush lines thoroughly PRIOR to hook-up
Pre-Installation Information

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 4Rev. 10/2019 www.willoughby-ind.com
General Description
MAINTENANCE & TROUBLESHOOTING
Visit our website at http.//www.willoughby-ind.com
2210 West Morris Street • P.O. Box 21217 • Indianapolis, IN 46221
[phone] • Fax: [phone] • [phone]
© Rev. 10/2005 Page 5
TOP-4 Manual Reset
General Description
In normal operation, when the toilet is flushed, the vacuum generator on the toilet pulls
air from the overflow port that is positioned at a particular height inside the bowl. The
overflow port is designed in a manner such that water will not flow into it unless the
height of water inside the bowl reaches the overflow port. Since the vacuum generator is
only pulling air through the system, vacuum does not build to a sufficient level that is
required to actuate the TOP-4 valve.
If the water level inside the toilet bowl reaches the overflow port, water will be pulled
through the system by the vacuum generator, When water begins to be pulled through the
system, the vacuum in the system increases to a sufficient level and actuates the TOP-4
valve. At this point, the TOP-4 valve has disabled the flush valve from operating and no
more flushes can be made. A check valve in the system holds the vacuum on the TOP-4
valve.
To enable the flush valve to operate again, the reset button must be pressed on the TOP-4
valve. Press and hold the reset button for 10 seconds. While holding the reset button, flush
the fixture. The TOP-4 valve has an integral reset button that is pointed out by a label on the
TOP-4 valve mounting bracket. When the reset button is pressed, the vacuum held on the
TOP-4 valve is released and the valve is reset. The flush valve will now function when
the flush push button is pressed. On the first flush after an overflow condition, the tubing
in the TOP-4 system will rid itself of water and the vacuum generator will return to pulling
only air through the system.
© Rev. 5/2011

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 5Rev. 10/2019 www.willoughby-ind.com
Physical Dimensions- Top-4 w/ Manual Reset

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 6Rev. 10/2019 www.willoughby-ind.com
Exploded-view w/BOM- Valve Assembly
1
Indianapolis, Indiana
TRB
C
PART #:
980401T-B
10/12/12
NAL 1/9/18 1 OF 1
SEE BOM
1:2
VALVE ASSEMBLY, T4-MANUAL RESET
SHEET:REV.:
ORIG.:REVISION:
SCALE: REF.:
MAT'L:
2 PLCS: A
ANGLE:
SIZE:
TITLE / DESC.:
FRACTIONS:
3 PLCS:
EXCEPT AS
TOLERANCES
NOTED
0.03 0.015 1/32"
Willoughby Industries, Inc.
STANDARD
NOTE:
5
3
1
4
9
16
KIT (PARTS: 17,18)
8
7
14
CANNOT BE PURCHASED INDIVIDUALLY.
10
11
12
13
19
18
17
6
15
2
AVAILABLE IN KIT FORM ONLY. ITEMS
NOTE:
LISTED IN THE EXPLODED VIEW. REPAIR KIT ORDERING #'S ARE PARTS LISTED IN THE PVK REPAIR KITS ARE NOT SOLD INDIVIDUALLY
PVK-3
DIAPHRAGM
ITEMS IN PVK-2, PVK-3, & 980320 ARE
NOTE:
PVK-2 DIAPHRAGM
KIT (PART: 14-18)
PVK-5 TOP4 REBUILD KIT (PARTS: 2-18)
980320 TOP4 COVER ASSEMBLY KIT (PARTS: (2-7)
ITEM # SUB-ASSY# PART # DESCRIPTION QTY.
1 N/A 980001A #8-32 x 1 1/4" SCREW 4 2
980320
380842 FITTING-HOSE BARB T4, 1/4" I.D. TUBE 1
3 980205 AIR SIDE TOP COVER 1 4 980203 TOP 4 RESET BUTTON 1 5 600129 O-RING, #013, BUNA N-70 1 6 980202 TOP 4 RESET SPRING 1 7 980204 TOP 4 RESET RING 1 8 N/A 980616 T4 VACUUM SPRING 1 9 980315 980160 MAGNET CUP & DIAPHRAGM ASSEMBLY 1
10 980132 MAGNET, PNEUMATIC METERING VALVE 1 11 N/A 380802M BODY, MOLDED WI PNEU. MTRG. 1 12 N/A 980127 O-RING M1.5x32 BUNA-70 1 13 N/A 980126 BARRIER CUP 1 14 N/A 980136 SPRING, WATER SIDE DIAPHRAGM 1 15 980310 980161 BUMPER, WATER SIDE ACTUATOR DISC 1
16 980125 DISK, WATER SIDE ACTUATING 1 17 980305 980128 3-PRONG VALVE SEAT ADAPTOR 1 18 980129 DIAPHRAGM - WATER SIDE - PM/EL 1
19 N/A 980426B TOP 4 BASE, SUB-ASSEMBLY 1
P/N: 980426B
ITEM # SUB-ASSY# PART # DESCRIPTION QTY.
1 N/A 980001A #8-32 x 1 1/4" SCREW 4 2
980320
380842 FITTING-HOSE BARB T4, 1/4" I.D. TUBE 1
3 980205 AIR SIDE TOP COVER 1 4 980203 TOP 4 RESET BUTTON 1 5 600129 O-RING, #013, BUNA N-70 1 6 980202 TOP 4 RESET SPRING 1 7 980204 TOP 4 RESET RING 1 8 N/A 980616 T4 VACUUM SPRING 1 9 980315 980160 MAGNET CUP & DIAPHRAGM ASSEMBLY 1
10 980132 MAGNET, PNEUMATIC METERING VALVE 1 11 N/A 380802M BODY, MOLDED WI PNEU. MTRG. 1 12 N/A 980127 O-RING M1.5x32 BUNA-70 1 13 N/A 980126 BARRIER CUP 1 14 N/A 980136 SPRING, WATER SIDE DIAPHRAGM 1 15 980310 980161 BUMPER, WATER SIDE ACTUATOR DISC 1
16 980125 DISK, WATER SIDE ACTUATING 1 17 980305 980128 3-PRONG VALVE SEAT ADAPTOR 1 18 980129 DIAPHRAGM - WATER SIDE - PM/EL 1
19 N/A 980426B TOP 4 BASE, SUB-ASSEMBLY 1
ASSEMBLED VALVE
INLET OUTLET
PLACE LABEL
TO SHOW FLOW
DIRECTION
WILLOUGHBY

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 7Rev. 10/2019 www.willoughby-ind.com
Check Contents
• Separate all parts from packaging and make sure all parts are accounted for before discarding
any packaging material. If any parts are missing, do not attempt to install T4 Overow Preventer
w/ Manual Reset until you obtain the missing parts�
NOTE: Before beginning installation, all supply, drain and waste piping for the T4 Overow
Preventer w/ Manual Reset must be completed according to specied rough-ins. If you
have not received rough-in details, please contact Willoughby Industries, Inc.
[phone]
 IMPORTANT: Flush all the water supply lines
before making connections.

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 8Rev. 10/2019 www.willoughby-ind.com
Installation Instructions
1.) Mount TOP-4 valve with reset button #980401T to the ush valve's vacuum breaker tube using
the included clamp� Tighten securely, but noy to the point of deforming the vacuum breaker tube�
Ensure the bracket is mounted on the vacuum breaker tube such that the rubber tee tting is
facing downward (see drawing on reverse side)�
2.) Connect the two (2) pieces of the tubing th the rubber tee tting.
3�) The natural color LDPE tubing #600471 (2 pieces at 36" long) should be connected to the s/s
vacuum generator and bowl sensor� This connection is made with a push-type union connector
#320446 & #320448 (see drawing on reverse side)�
Do not shorten this piece of tubing.
4.) The TOP-4 valve is installed in the hydraulic ush valve's low pressure line. This line is identied
with a letter "L" on a Sloan® ush valve and pushbutton for the ush valve. After this line has been
connected between the ush valve and the pushbutton, cut it at a location that will allow both of
the cut ends to reach the TOP-4 valve� The tube that connects the high pressure (letter "O" on a
Sloan® valve) ttings on the ush valve and pushbutton will remain unchanged.
5.) The line from the ush valve (letter "L" on a Sloan® valve) connects to the elbow tube tting on the
top of the TOP-4 valve and the line from the ush valve pushbutton (letter "L" on a Sloan®valve)
connects to the straight tting on the bottom of the TOP-4 valve (see drawing on reverse side).
6�) Ensure all connections are tight to complete the installation�
Note: if the plastic ttings are taken apart for any reason, use ONLY thread tape on the plastic
threads to reseal them� DO NOT USE ANY OTHER THREAD SEALERS OR THREAD
LOCKERS ON THE PLASTIC THREADS. Thread sealers and thread lockers will attack the black
plastic parts� If you have any questions, contact Willoughby Industries at: [phone]�

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 9Rev. 10/2019 www.willoughby-ind.com
Care and Maintenance
MAINTENANCE & TROUBLESHOOTING
Visit our website at http.//www.willoughby-ind.com
2210 West Morris Street • P.O. Box 21217 • Indianapolis, IN 46221
[phone] • Fax: [phone] • [phone]
© Rev. 10/2005 Page 7
TOP-4 Manual Reset Maintenance
There is no regularly scheduled maintenance required for the “Manual-Reset” system. The system should be visually
checked for cracks in the flexible vacuum lines during normal maintenance inspections of other plumbing systems. If any
cracking or damage is found, it is recommended that all flexible vacuum lines and connectors be replaced at that time.
© Rev. 5/2011 Page 7

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 10Rev. 10/2019 www.willoughby-ind.com
Troubleshooting Guide
MAINTENANCE & TROUBLESHOOTING
Visit our website at http.//www.willoughby-ind.com
2210 West Morris Street • P.O. Box 21217 • Indianapolis, IN 46221
[phone] • Fax: [phone] • [phone]
© Rev. 10/2005 Page 8
TOP-4 Manual Reset Troubleshooting Guide
© Rev. 5/2011
Issues
1. Toilet Won’t Flush
2. Toilet Will Only Flush Once
3. TOP-4 Valve Prevents Flushing in Overflow, but Quickly Resets Itself
4. Toilet Will Still Flush When in an Overflow Condition
Solutions
1. Toilet Won’t Flush
a. If nothing happens when the flush push button is pressed
1. Ensure that the water is being supplied to the flush valve.
2. Press the white reset button located on the TOP-4 valve to
ensure that the valve is open.
b. If water enters the toilet when the flush button is pressed
1. It is likely that the blowjet in the toilet has become blocked
debris.
2. Toilet Will Only Flush Once (then nothing happens when the flush button is pressed)
a. If this is the first flush after an overflow condition, press the white reset button
on the TOP-4 valve again. Some times the TOP-4 valve can close on the
first flush after an overflow condition.
b. If there has been no previous overflow condition, a piece of tubing is either
blocked or kinked.
1. Check the piece of tubing that is connected to the overflow sensor port
and make sure it is not kinked and does not have an obstruction.
2. Inside the toilet bowl, check the underneath side of the overflow sensor
port and make sure there is nothing blocking this port (the use of a mirror
may be required to check the port for blockage).
3. TOP-4 Valve Prevents Flushing in Overflow, but Quickly Resets Itself
a. The o-ring on the reset button has likely become dirty, and is not sealing properly.
1. A new reset assembly may be ordered (see drawings in this document).
1. If a new reset assembly is being ordered, skip the subsequent steps.
2. Review the drawings in this manual.
3. Remove the two pieces of tubing from the rubber tee fitting that are going
to the overflow port and vacuum generator port on the toilet.
4. Remove the TOP-4 mounting bracket from the flush valve.
5. Remove the check valve from the rubber tee fitting.
6. Remove all four screws in the valve and pull off the valve cover with integral
reset button.

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 11Rev. 10/2019 www.willoughby-ind.com
Troubleshooting Guide (cont.)
MAINTENANCE & TROUBLESHOOTING
Visit our website at http.//www.willoughby-ind.com
2210 West Morris Street • P.O. Box 21217 • Indianapolis, IN 46221
[phone] • Fax: [phone] • [phone]
© Rev. 10/2005 Page 9
7. A plastic plate will need to be removed from inside the valve cover.
To do this, simply press the plate inward and turn the plate counter-
clockwise a partial turn and it will fall out.
8. Remove the reset spring, reset button o-ring and reset button by
pulling on the reset spring.
9. Check all components, , including the valve cap, for dirt and debris.
1. Clean all components, if necessary, and allow them to dry
before reassembling.
2. The o-ring may need to be replaced in severe instances.
The o-ring is a standard #013 o-ring.
a. DO NOT, UNDER ANY CIRCUMSTANCES,
LUBE THIS O-RING!
10. Reassemble and test for functionality.
b. The check valve may not be operating properly.
1. Replace the check valve with a new one from Willoughby.
c. Contact Willoughby Industries for further assistance if you have
tried all of the steps listed above and problem persists.
4. Toilet Will Still Flush When in an Overflow Condition
a. The TOP-4 valve may be connected improperly. Check documentation to
verify that the TOP-4 valve is properly connected to the flush valve and
flush button.
b. Tubing may be kinked, ,blocked, connected improperly or have a hole in it.
1. Ensure that the tubing to the overflow port and vacuum generator
are securely hooked up.
a. Also ensure the same tubing is secure in the rubber tee fitting.
b. Ensure that both pieces of tubing are 3 feet in length.
2. Ensure that no tubing is kinked, blocked or has a hole in it.
c. Check and see if the vacuum generator is pulling a vacuum.
1. Locate the tubing that is connected to the vacuum generator. Pull
that tubing out of the rubber tee fitting, While someone flushes the
toilet, hold a finger over the piece of tubing that is connected to the
vacuum generator-you should be able to feel the vacuum with your finger.
d. Make sure the tubing to the vacuum generator and overflow sensor port is three
feet long each. Cutting the tubing short can hamper valve operation.
e. Make sure the correct tubing is running to the vacuum generator and overflow sensor
port (you may need to review the documentation that came with the TOP-4 valve).
f. The check valve may not be functioning properly.
1. Replace check valve with a new one from Willoughby.
g. Contact Willoughby Industries for further assistance if you have tried all of the steps
listed above and problem persists.
© Rev. 5/2011

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 12Rev. 10/2019 www.willoughby-ind.com
Troubleshooting Guide Diagram

Installation & Operation Manual
Toilet Overow Preventer w/ Manual Reset
T4
Willoughby Industries, Inc. TOLL FREE [phone] ● LOCAL [phone] ● FAX [phone]
Page 13Rev. 10/2019 www.willoughby-ind.com
Warranty
Willoughby Industries, Inc� warrants to commercial and institutional purchasers only that each unit will
be free from defects in workmanship and materials under normal use and service upon the following
terms and conditions� The period during which components are warranted is as follows:
1� All other components warranted for 1 year from date of shipment�
This warranty does not cover installation or any other labor charges and does not apply to any
components damaged by accident, abuse, improper installation or improper maintenance� This
warranty does not cover any installation that did not comply with national, state and local building,
plumbing or electrical codes� The warranty is limited to replacing or repairing at manufacturer's option,
transportation charges prepaid by the purchaser, any component or part which upon our inspection
shall be deemed as defective within the limitations of this warranty� The replacement or repair of
defective units as stated in this warranty shall constitute the sole remedy of the purchaser and the
sole liability of Willoughby Industries, Inc� Willoughby Industries, Inc� shall not otherwise be liable
under any indirect damages caused by defects in the repair or replacement thereof�
This warranty only extends to commercial and industrial purchasers and does not extend to any
others, including consumer customers of commercial institutional purchasers� This warranty is in lieu
of all other warranties, expressed or implied, including implied warranty of merchantability or tness
for a particular purpose or otherwise�