KOHLER K-11748-K, K-11748-KS Installation Manual

Installation and Care Guide

Bath and Shower Valve

K-11748-K K-11748-KS

M product numbers are for Mexico (i.e. K-12345M)
Los números de productos seguidos de
M corresponden a México (Ej.
K-12345M)
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Español, página “Español-1”

1128093-2-E

IMPORTANT INSTRUCTIONS

READ AND SAVE FOR THE

CONSUMER

WARNING: Risk of scalding or other severe injury.

•

Before completing installation, the installer must set the
maximum water temperature setting of this valve to minimize the
risks associated with scalding hazards according to ASTM F 444.

•

Do not install a shut-off device on either outlet of this valve. The
installation of any such device may create a cross-flow condition
at the valve and affect the water temperature.

•

Factors that change the temperature of the water supplied to the
valve, such as seasonal water temperature changes, and water
heater replacement or servicing, will change the maximum water
temperature supplied by the valve and may create a scalding
hazard. The pressure-balancing valve will not compensate for
changes in the water supply temperature; adjust the maximum
water temperature setting of this pressure-balancing valve when
such changes occur.

•

Pressure-balancing valves may not provide protection against
scalding if there is a failure of other temperature-limiting devices
elsewhere in the plumbing system.

NOTICE: Only apply silicone based lubricants to these valves. Do
not use petroleum based lubricants. Petroleum based lubricants will
harm the O-rings, seals, and plastic components.

The installer is responsible for installing the valve and adjusting the
maximum water temperature of this pressure-balancing valve
according to instructions.

This valve meets or exceeds ANSI A112.18.1 and ASSE 1016.

If you do not understand any of the installation or temperature
adjustment instructions in this document, in the United States please
contact our Customer Care Center at 1-800-4KOHLER. Outside the
U.S., please contact your distributor.

IMPORTANT NOTICE TO INSTALLERS! Please fill in the blanks in
the information box below and on the valve label. Retain this
information for future reference.

1128093-2-E 2 Kohler Co.

IMPORTANT INSTRUCTIONS (cont.)

NOTICE TO HOMEOWNERS! This device has been preset by
_______________________ of _______________________________ to
ensure a safe maximum temperature. Any change in the setting may
raise the discharge temperature above the limit considered safe, and
lead to scalds.

Date: ______________

Tools

5/64"

Hex Wrench

Hacksaw or Tubing Cutter

Strap WrenchSealant TapeSolder

Important Information

WARNING: Risk of scalding. High water temperature can
cause severe burns. Set the water temperature at or below
120°F (49°C) following the adjustment procedure.

NOTICE: Do not force the handle in any direction. Forcing the
handle will damage the valve.

NOTE: The primary outlet is the outlet that the water will flow
from when the valve is turned on. Water will flow from the
secondary outlet when the diverter is pressed.

This valve can be used for two different installation
configurations: 1) Bath Spout (primary) with Showerhead or
Handshower (secondary) and 2) Showerhead (primary) with
Handshower (secondary). See the ″Installation Options″ section
for example piping options. Follow only the instructions that
apply to your chosen installation.

Kohler Co. 3 1128093-2-E

Important Information (cont.)

This valve can be used for thin and thick wall installations. Thin
wall installations are typically fiberglass and acrylic. Thick wall
installations are typically tile, plaster, marble, or other similar
material.

Observe all local plumbing and building codes.
Shut off the water supply.

1128093-2-E 4 Kohler Co.

Installation Options

12

Bath as Primary Outlet

Preparation

Showerhead as
Primary Outlet

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Stop
Assembly

1. Prepare the Valve

IMPORTANT! The internal components of the valve will only need
to be removed for back-to-back installations (reversed valve only) or
installations that require soldering of connections.

NOTE: Only valves with stops will include the stop assembly.

Solder Installations Only

Remove the plaster guard (not shown).
Remove internal valve components as shown and set aside.

Back-to-Back Installations Only

Remove the plaster guard (not shown).
For the reversed valve, remove internal components as shown

and set aside. The stop assembly does not need to be removed if
soldering is not needed.

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2x4 Bracing

72" (1829 mm) –
78" (1981 mm)
To Floor
(Typical)

2-1/16" (52 mm)

Finished Wall

7" (178 mm) –
18" (457 mm)
[10" (254 mm)
Recommended

4" (102 mm)

Cold Supply

Hot Supply

2-3/4" (70 mm)

Thin Wall

2-1/16" (52 mm)

Finished
Wall

2-3/4" (70 mm) –
3-1/2" (89 mm)

Thick Wall

2. Roughing-In

Showerhead/Bath Spout Installations

For Back-to-Back Installations: Proceed to the ″Install the Supply
Piping and Valve, Back-to-Back″ section.

Route the supplies and install the valve. Refer to the roughing-in
illustration for your installation.

NOTE: The position of the 2x4 bracing is dependent on the
thickness of your finished wall.

Install 2x4 bracing behind the plate as shown.
Install bracing at the showerhead and bath spout outlet

installation locations.
Connect the water supplies using 1/2” copper, CPVC, or PEX

components. Use thread sealant on all threaded connections.
Proceed to the “Route the Piping” section for your installation

configuration.

Kohler Co. 7 1128093-2-E

2x4 Bracing

72" (1829 mm) –
78" (1981 mm)
To Floor (Typical)

2-1/16" (52 mm)

Finished Wall

48" (1220 mm)
To Floor

Cold Supply

Hot Supply

2-3/4" (70 mm)

Thin Wall

2-1/16" (52 mm)

Finished
Wall

2-3/4" (70 mm) –
3-1/2" (89 mm)

Thick Wall

3. Roughing-In

Showerhead/Handshower Installations

For Back-to-Back Installations: Proceed to the ″Install the Supply
Piping and Valve, Back-to-Back″ section.

Route the supplies and install the valve. Refer to the roughing-in
illustration for your installation.

NOTE: The position of the 2x4 bracing is dependent on the
thickness of your finished wall.

Install 2x4 bracing behind the plate as shown.

NOTE: The outlet positions are dependant on your particular
installation and may differ from the illustration shown.

Install bracing at the showerhead and handshower outlet
installation locations.

Connect the water supplies using 1/2” copper, CPVC, or PEX
components. Use thread sealant on all threaded connections.

1128093-2-E 8 Kohler Co.

Roughing-In (cont.)

Proceed to the “Route the Piping” section for your installation
configuration.

Kohler Co. 9 1128093-2-E

Hot Supply

Cold Supply

4. Install the Supply Piping and Valve

Back-to-Back Installation

NOTICE: Do not install the valve body upside down.

Route the supplies and install the valves. Refer to the roughing-in
illustration for your installation.

NOTE: One valve will have reversed supply connections, hot
supply to ″COLD″ inlet and cold supply to ″HOT″ inlet.

Connect the water supplies as shown. Use sealant tape on all
threaded connections.

Install 2x4 bracing behind the plate (not shown).
Proceed to the “Route the Piping” section for your installation

configuration.

1128093-2-E 10 Kohler Co.

Showerhead Outlet

1/2" Pipe Nipple

Hot Supply

Bath Outlet

Cold Supply

1/2" Pipe Nipple

5. Route the Piping

Bath Spout as Primary Outlet

Install piping and elbows to the bath and showerhead installation
locations. Use thread sealant on all threaded connections.

Secure the piping to the framing.
Solder all needed connections.
Temporarily install 1/2” pipe nipples to the elbows so they will

extend at least 2” (51 mm) beyond the finished wall.
Install caps to both pipe nipples.
Proceed to the “Reassemble the Valve” section.

Kohler Co. 11 1128093-2-E

Showerhead Outlet

Handshower Outlet

1/2" Pipe Nipple

Hot Supply

1/2" Pipe Nipple

Cold Supply

6. Route the Piping

Showerhead as Primary Outlet

NOTE: Illustration shows the recommended piping configuration.
Piping may need to be modified to accommodate your specific site.

Install piping and elbows to the showerhead and handshower
supply locations. Use thread sealant on all threaded connections.

Secure the piping to the framing.
Solder all needed connections.
Temporarily install 1/2” pipe nipples to the elbows so they will

extend at least 2” (51 mm) beyond the finished wall.
Install caps to both pipe nipples.
Proceed to the “Reassemble the Valve” section.

1128093-2-E 12 Kohler Co.

Cap Assembly
Pressure
Balancing Unit

Black Tab

Stop Assembly

Collar

7. Reassemble the Valve

Solder Installations Only

Slowly open the water supply and flush the lines and valve body
before assembling the internal components. Turn off the water
supply.

Reinstall the stop assembly (certain models) and the pressure
balancing unit.

For reversed valves in back-to-back installations proceed to
″Back-to-Back Installations Only.″

Reinstall the cap assembly with the black tab oriented up.
Install the collar and secure with the screws.

Back-to-Back Installations Only

The cap assembly for the reversed valve only will need to be
reinstalled, with the black tab oriented down, to the valve with
the reversed supply connections. Install the cap assembly to the
second valve with the black tab oriented up.

Install the collar and secure with the screws.

Kohler Co. 13 1128093-2-E

Cap

8. Flush the System

Remove the cap from one of the pipe nipples.
Turn the valve stem clockwise to the full open position. Water

will flow from the uncapped outlet.
Turn the valve stem counterclockwise to close.
Reinstall the cap.
Repeat for the second pipe nipple.
Reinstall the cap.

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Finished Wall

Ø 5-9/16"
Ø 5-9/16"
(141 mm)

*2-3/4" (70 mm) – 3-1/2" (89 mm)
Rough-In Depth

* Refer to the valve trim specification sheet

for roughing-in dimensions.

(141 mm)

Plaster Guard

9. Install the Finished Wall

Thick Wall

NOTE: The plaster guard can be used as a guide for marking the
cutout.

Cut a 5-9/16″ (141 mm) hole in the wall material.
Install the finished wall material.
Leave the plaster guard in place at this time.

Kohler Co. 15 1128093-2-E

Plaster Guard

Ø 3-1/2"
(89 mm)

Plaster Guard

Discard.

1-9/16"
(40 mm)

45˚

1-9/16"
(40 mm)

Screws

Ø 4-1/2"
(114 mm)

2-3/4" (70 mm)
Rough-In Depth

Ø 4-1/2"
(114 mm)

45˚

Wall
Material

Drywall
Screws

10. Install the Finished Wall

Thin Wall

Twist the dome of the plaster guard to separate it from the outer
ring. Discard the outer ring.

Slide the dome over the valve stem.

NOTE: The plaster guard dome can be used as a guide for marking
the cutout.

Cuta4″ (102 mm) hole in the wall material.
For Valves with Stops: Using the holes in the valve backing plate

as a guide, cut openings for the stops.
Secure the wall material to the valve backing plate at the

locations shown.
Leave the plaster guard dome in place at this time.

1128093-2-E 16 Kohler Co.

Black Tab

Setscrew

Collar

O-Ring

Valve Stem

Minor
Adjustment

Major
Adjustment

Temperature Limiting Adjustment

CAUTION: Risk of personal injury. If the water
temperature is set too high, scalding will occur. The water
temperature should never be set above 120°F (49°C).

Turn the valve stem clockwise to the full open position. Allow the
water to run for several minutes.

Using a thermometer, check the water temperature.
Turn off the water.

Minor Temperature Adjustment

Using a hex wrench, turn the setscrew clockwise to lower the
temperature and counterclockwise to raise the temperature.

Recheck the water temperature.

Major Temperature Adjustment

Remove the O-ring and collar from the valve stem.
Turn the valve stem clockwise in small increments. Check the

water temperature at each increment.
Once the desired maximum water temperature is reached, leave

the water running and reinstall the collar to the valve stem with
the setscrew positioned against the black tab.

Turn off the water.
Reinstall the O-ring.

Kohler Co. 17 1128093-2-E

Warranty

KOHLER®Faucet Lifetime Limited Warranty

Kohler Co. warrants its Faucets* manufactured after January 1, 1997, to
be leak and drip free during normal residential use for as long as the
original consumer purchaser owns his or her home. If the Faucet
should leak or drip during normal use, Kohler Co. will, free of charge,
mail to the purchaser the cartridge necessary to put the Faucet in good
working condition. This warranty applies only to Kohler Faucets
installed in the United States of America, Canada or Mexico (″North
America″).

Kohler Co. also warrants all other aspects of the faucet or accessories
(″Faucet″)*, (except gold, non-Vibrant
of defects in material and workmanship during normal residential use
for as long as the original consumer purchaser owns his or her home.
This warranty applies only to Kohler Faucets installed in North
America. If a defect is found in normal residential use, Kohler Co. will,
at its election, repair, provide a replacement part or product, or make
appropriate adjustment. Damage to a product caused by accident,
misuse, or abuse is not covered by this warranty. Improper care and
cleaning will void the warranty**. Proof of purchase (original sales
receipt) must be provided to Kohler Co. with all warranty claims.
Kohler Co. is not responsible for labor charges, installation, or other
incidental or consequential costs. In no event shall the liability of
Kohler Co. exceed the purchase price of the Faucet.

If the Faucet is used commercially or is installed outside of North
America, or if the finish is gold, non-Vibrant or a painted or powder
coated color finish, Kohler Co. warrants the Faucet to be free from
defects in material and workmanship for one (1) year from the date the
product is installed, under Kohler Co.’s standard one-year limited
warranty.

If you believe that you have a warranty claim, contact Kohler Co.,
either through your Dealer, Plumbing Contractor, Home Center or
E-tailer, or by writing Kohler Co., Attn.: Customer Care Center, 444
Highland Drive, Kohler, WI 53044, USA. Please be sure to provide all
pertinent information regarding your claim, including a complete
description of the problem, the product, model number, color, finish,
the date the product was purchased and from whom the product was
purchased. Also include your original invoice. For other information,
or to obtain the name and address of the service and repair facility
nearest you, call 1-800-4-KOHLER (1-800-456-4537) from within the
USA and Canada, and 001-800-456-4537 from within Mexico, or visit
www.kohler.com within the USA, www.ca.kohler.com from within
Canada, or www.mx.kohler.com in Mexico.

KOHLER CO. AND/OR SELLER ARE PROVIDING THESE

, non-chrome finishes) to be free

®

1128093-2-E 18 Kohler Co.