Kohler K-25737X-C Assembly instructions

Installation and Care Guide
Two-Piece Toilet


1402301-X2-A ©2021 Kohler Co.
K-25737X-C
EN English
TH 

1402301-X2-A 2 Kohler Co.
Thank You for Choosing Kohler Company
Thank you for choosing Kohler. Kohler craftsmanship offers you a rare
combination of proven performance and graceful sophistication that will
satisfy you for years to come. The dependability and beauty of your Kohler
product will surpass your highest expectations. We’re very proud of our
products here at Kohler and we know you will be too.
Please take a few minutes to review this manual before you start installation. If
you encounter any installation or performance problems, please don’t hesitate
to contact us. Our phone numbers and website are listed on back cover.
All information in this manual is based upon the latest product information avail-
able at the time of publication. At Kohler, we constantly strive to improve the
quality of our products. We reserve the right to make changes in product char-
acteristics, packaging or availability at any time without notice.
Thank you for choosing Kohler Company.
Important Information
IMPORTANT NOTICE TO INSTALLERS!:Please leave these instructions for
the consumer. They contain important information.
In addition to installation procedures, this manual contains important care and
cleaning. Please retain for future reference.
NOTE: The toilet pictured in the installation steps may differ from the model
being installed.

Kohler Co. 3 1402301-X2-A
Before You Begin
¨Observe all local plumbing and building codes.
¨Prior to installation, unpack the new product and inspect it for damage.
Return the product to its protective carton until you are ready to install it.
¨Use the template supplied with the product.
¨Failure to follow these precautions may result in a poor installation.
¨If the existing toilet does not have a supply shut-off valve below the tank,
install one before installing the new toilet.
¨Do not use white cement or high lime content cements to install this toilet.
The expansion of cement due to a rise in temperature may make the toilet
crack or cause damage. Kohler is not responsible for any damage caused
by installation with the use of cement.
¨Fixture dimensions are nominal and conform to tolerances established by
Standards ASME A112.19.2/CSA B45.1, TIS 792
CAUTION: Risk of personal injury or product damage. Handle with
care. Product can break, chip, or cause injury if handled carelessly.
CAUTION: Risk of property or product damage. Turn on the water
and allow water to ow through the supply pipe to ush the system of
any debris before connecting ll valve.
CAUTION: Risk of hazardous gases. If the new toilet is not installed
immediately, temporarily place a rag in the closet ange.

1402301-X2-A 4 Kohler Co.
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Kohler Co. 5 1402301-X2-A
Tools/

¨ 
¨ 
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¨ 
¨ 
¨  

¨  
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¨     
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 
 
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
 



1402301-X2-A 6 Kohler Co.
Installation / 



1/2” Supply
Verify inlet and outlet position. Position the template on the oor to
ensure the template against the wall.
Tape in place.



Drill 2 floor mounting holes and
3 flange holes. Insert anchors.




Draw centerline
on the floor.

10
Position the brackets as shown on
the template and install the bracket.




3
1
4
2

Kohler Co. 7 1402301-X2-A
Installation / 
Plastic Trap Outlet
Install the wax ring and trap outlet on the
floor. Tighten with screws.


 Connector
Wax Ring
  

Turn the tank upside down and place the gasket to the tank. Install the tank onto
the bowl.

CAUTION: Risk of product damage. Overtightening may cause breakage or
chipping of the vitreous china.
☐Assemble the washers and nuts to the tank bolt. Tighten the nuts so the tank is level.
☐Be sure the nuts are tight enough to achieve a watertight seal.


☐
☐
Tank
Viewing the
assembly from
under the Tank
Tank
Gasket
Washer
Brass Nut
Tank
Bolt
Rubber washer
Bowl
Bowl
ถังพักนํ�า
ถังพักนํ�า
แหวนรอง
ถังพักนํ�า
โถสุขภัณฑ์
โถสุขภัณฑ์
ปะเก็นยาง
โบลท์
นอต
มุมมองการประกอบ
จากด้านใต้ถังพักนํ�า
แหวนรอง
5
6

1402301-X2-A 8 Kohler Co.
Installation / 
Thread the supply hose onto the ll valve shank. Slide nut of inlet cover onto the supply
hose, with flared end last and run hose through toilet wall.


Take hose guide apart and slide onto the supply hose, with the flared end last. Slide the
two inserts into the flared end of the hose guide. Insert into toilet wall and tighten nut.

Hose Guide
ฝาครอบสายนํ�าดี
7
8

Kohler Co. 9 1402301-X2-A
Installation / 
1/2” Supply



Carefully align and lower the bowl. Apply weight to the bowl rim to let the outlet insert
into plastic trap. Carefully thread the screws into the brackets, until toilet is secure.
Alternately tighten left and right sides to prevent pulling the toilet off center. Install cap
to cover screw.
Connect the supply hose to shut-off valve.

Apply silicone around base.




Outlet
Plastic Trap
ท่อนํ�าทิ�ง
ข้อต่อท่อนํ�าทิ�ง
Cap
Screw
Bushing
ปลอก
สกรู
ฝาครอบ
9
10

1402301-X2-A 10 Kohler Co.
Installation / 
Adjust the water level.

Fill Valve
วาล์วนํ�าเข้า
Flush Valve
วาล์วนํ�าออก
Push Button
ชุดปุ่มกดชําระ
Float Canister
ลูกลอยวาล์วนํ�าเข้า
Button Box
ชุดกล่องปุมกดชําระ
Steel Wire
สายปุ่มกดชําระ
FITTINGS AND RELATIVE POSITION IN TANK
Cautuion:
Restore the moved or removed parts according to the positions and directions as
shown.
Pay attention to the position and angle of the oat canister to avoid interfere with the
steel wire on the box.



10

Kohler Co. 11 1402301-X2-A
IMPORTANT: Before turning on the supply valve for the rst time, follow the steps below
to clear sand, debris and rust from the system.
Make sure water supply is off. Remove valve END by rotating it 1/8 turn counterclockwise.
While holding a container over the uncapped VALVE to prevent splashing, turn water
supply on and off a few times. Leave water supply off.
Replace END by engaging lugs and rotating 1/8 turn clockwise. Make certain the top
is turned to the locked position. Valve may not turn on if top is not fully in the
locked position.
Turn on water supply. Check that water level is at the marked water line.
Install the toilet seat according to the seat manufacture’s installation instruction.
Attach the tank cover.
Installation / 










1402301-X2-A 12 Kohler Co.
Care and Cleaning
For best results, keep the following in mind when caring for your product:
• Carefully read the cleaner product label to ensure the cleaner is safe for use
on the material.
• Always test your cleaning solution on an inconspicuous area before applying
to the entire surface.
• Wipe surfaces clean and rinse completely with water immediately after
cleaner application. Rinse and dry any overspray that lands on nearby
surfaces.
• Do not allow cleaners to sit or soak on the surface.
• Use a soft, dampened sponge or cloth. Never use an abrasive material such as
a brush or scouring pad to clean surfaces.
• Be careful not to leave staining materials in contact with the surface for
extended periods of time.
• The ideal cleaning technique is to rinse thoroughly and blot dry any water
from the surface after each use.
WARNING: Risk of property or product damage. Do not use in-tank
cleaners in your toilet. Products containing chlorine (calcium hypochlorite)
can seriously damage ttings in the tank. This damage can cause leakage
and property damage.

Kohler Co. 13 1402301-X2-A

 

•   

•  

•  

• 
•      

• 
•  






1402301-X2-A 14 Kohler Co.
Troubleshooting Guide
Symptoms Recommended Action
1. Poor flush. A. Adjust the tank water level to match the waterline.
B. Fully open the water supply shut-off valve.
C. Clear obstructions from the trapway, jet, or bowl rim
holes.
D. Clear obstructions from the waste line.
2. No flush. A. Make sure the push button rods are in place. Adjust
as needed.
3. The ll valve
turns on/off by
itself or it runs,
allowing water to
enter the tank.
A. Check the position of flush valve cable, flush valve
cable must not overlap the valve float sinks.
B. Check the position of flush valve cable, flush valve
cable must not obstructive the phase of overflow
tube.
C. Clean or replace the flush valve seal if it is worn,
dirty, or misaligned with the valve seat or flush valve
seat is damaged.
D. Clean the ll valve seal of debris or replace the
seal assembly.
E. Replace the ll valve if the valve float sinks.
F. Adjust the tank water level if it is too high.
4. Long tank ll
cycle.
A. Fully open the water supply shut-off valve.
B. Clean the valve inlet, valve head, or supply line.
Flush the lines.
C. Clean the valve inlet, valve head, or supply line.
Flush lines.
5. Noisy tank ll
cycle.
A. Partially close the water supply shut-off valve if the
water pressure to the toilet is too high. Check the
toilet performance following any such adjustment.
B. Remove dirt or obstructions from the valve head.
Flush the lines.

Kohler Co. 15 1402301-X2-A

 




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
 



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





 




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








1402301-X2-A kohler.com

 
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E-mail: [email protected]
KOHLER ASIA PACIFIC LIMITED
Asia Customer Service Centre
No.158, Jiang Chang San Road, Zhabei District, Shanghai, PRC. 200436.
Tel : [phone]
KOHLER (THAILAND) PUBLIC COMPANY LIMITED
16th FL. Jasmine City Bldg., 2 Soi Sukhumvit23, Sukhumvit Road, Wattana, Bangkok, Thailand. 10110
Call Center Tel. +(66) 2700 9299