KOHLER K-18647 Installation Manual

Installation and Care Guide

In-Wall Tank and Carrier

K-18647

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1247365-2-B

Tools and Materials

Qty: 8
3/8" x 2-1/2" (64 mm) Min
Lag Bolts with Washers

Plus:

• Conventional woodworking
tools and materials

• 3/8" x 2" (51 mm) Min
Concrete Expansion Bolts
(for concrete subflooring)

Optional:

• Assorted electrical tools

Before You Begin

IMPORTANT! 2x4 framing or larger is required for this installation.

IMPORTANT! In areas with freezing temperatures, install on an

interior wall. If installed on an exterior wall, provide adequate
insulation to prevent the possibility of freezing.

NOTE: If 2x6 framing is used, the drain outlet may be angled 45
degrees in either direction.

NOTE: This product is not intended to be used as a retrofit device
for 1.28 gpf (4.8 lpf) water closets.

Only bowl model K-76395 is compatible with this carrier.
During installation, make sure the inlet tube connections and

gaskets remain fully engaged to ensure a watertight seal.
Observe all local plumbing and building codes.

1247365-2-B 2 Kohler Co.

1/2" NPT

23-1/4" (590 mm)

3-3/16" (80 mm)

1-9/16" (40 mm)

15-1/4"
(387 mm)
Min

23"
(584 mm)
Max

10-7/8" (276 mm)

Roughing-In

50-15/16"
(1294 mm)

2x4 Studs
3-3/4"
(95 mm)
2x6 Studs
5-3/16"
(132 mm)

1/4" (6 mm)

28"
(711 mm)

Centerline
of Outlet

1-3/4 (44 mm)

Kohler Co. 3 1247365-2-B

2x4 Studs
or 2x6 Studs

PVC
Elbow

23-1/4"
(591 mm)

PVC Waste Outlet
1-3/4" (44 mm) [2x4 Studs]
3-1/4" (83 mm) [2x6 Studs]

Waste Outlet

Cast Iron Outlet
2-7/8" (73 mm) [2x6 Studs]

1. Install the Framing

IMPORTANT! The waste outlet location is critical. Use the correct
dimension (shown above) from the front edge of the framing to the
center of the waste outlet for your installation.

NOTE: The waste outlet pipe may need to be relocated for this
installation.

NOTE: A PVC elbow is supplied with this product. A cast iron
elbow may be required by codes in some areas. The height of the
toilet drain pipe may need to be adjusted if the cast iron elbow is
used.

NOTE: Double studs must be used on either side of the stud
pocket.

Construct the stud pocket according to the dimensions shown.

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Install the Framing (cont.)

Locate the center of the waste outlet from the front edge of the
framing to the dimension shown for your installation.

Waste Pipe Installation Options:

NOTE: These installation options are suggestions. Follow all
applicable codes in your area.

4″ Diameter PVC

Install the supplied rubber, ribbed adapter onto carrier’s PVC
elbow and insert it into the 4″ PVC waste outlet pipe.

The waste outlet pipe height must be sufficient to allow rubber
ribbed adapter to be fully inserted into waste outlet pipe.

NOTE: The 4″ PVC waste outlet pipe is wider than the stud pocket
in a 2x4 installation requiring that the wall material be carved out
on both sides of the installation wall to fit waste pipe.

3″ Diameter PVC

Couple to carrier’s PVC elbow using flexible coupler or a glued
PVC coupler.

NOTE: PVC or flexible coupler may be wider than stud pocket in a
2x4 installation, requiring the wall material be carved out on both
sides of the installation wall to fit coupler.

Cast Iron Waste Outlet

The cast iron outlet must be installed as required by local codes.
Use the KOHLER cast iron outlet specified on the specification
sheet.

The recommended cast iron waste pipe will center 2-7/8″ (73
mm) from the front of the frame.

NOTE: The cast iron waste pipe will not be centered inside 2x4
framing and will protrude beyond the back of the stud pocket. 2x6
framing or a chase behind 2x4 framing is required for cast iron
outlets.

Kohler Co. 5 1247365-2-B

Front View

Mounting
Frame

PVC
Elbow

Drain
Clamp

2. Prepare the Carrier

Position the carrier face down on the floor.
Using a hex wrench, loosen the nuts securing the legs to the

carrier.
Raise the carrier 8″ (203 mm) - 10″ (254 mm) high to allow access

to the feet.
Tighten the nuts securing the legs to the carrier.

1247365-2-B 6 Kohler Co.

Back View

2x62x4

3. Install the Drain Clamp

NOTE: If using 2x6 studs, install the drain mounting frame in the
back notches as shown.

Install the drain mounting frame into the front notches on the
bottom of the carrier.

Insert the PVC elbow into the mounting frame.
Secure the elbow in place with the drain clamp. Push the clamp

into the frame until it locks into place.

Kohler Co. 7 1247365-2-B

Mark the carrier.

2-5/8"
(67 mm)

Threaded
Rods

Finished
Floor

Nut

Leg

4. Adjust the Carrier Height

IMPORTANT! If the carrier is not correctly adjusted, the bowl rim
height may not be compliant with applicable codes.

X

NOTE: The minimum rim height is 15″ (381 mm). The maximum
rim height is 23″ (584 mm). The carrier can be adjusted up to 8″ (203
mm), with 6″ (152 mm) or less of adjustment sufficient in most
installations.

Move the carrier into place in the stud pocket.
Align the carrier flush with the front edge of the studs. The front

of the carrier should be flush with the front edge of the studs or
set back slightly for finished wall installation.

Check the front of the carrier for plumb.
Temporarily secure the carrier in place so it will not fall.
Install the threaded rods several turns into the carrier.
Make a mark on the carrier 2-5/8″ (67 mm) above the top of the

threaded rod.
Measure from the finished floor to the mark (X) to determine the

rim height of the bowl.

1247365-2-B 8 Kohler Co.

Adjust the Carrier Height (cont.)

To adjust the carrier to the desired height, loosen the nuts
securing the legs to the carrier.

NOTE: As the carrier is lowered, make sure the elbow and gasket
(if present) align with the floor drain pipe.

Adjust the carrier until the desired height is reached. Securely
tighten the nuts using a wrench to secure the legs in place.

NOTE: If a cast iron elbow is required, make the connections
following all applicable codes.

Kohler Co. 9 1247365-2-B

Lag Bolts

5. Install the Carrier

IMPORTANT! It may be difficult to drill pilot holes for the feet lag
bolts if your carrier has been adjusted to a low height. If there is not
enough room to drill the pilot holes, mark their location and
temporarily remove the carrier to drill them.

Mark the hole locations for the eight lag bolts, one for each foot
and three on either side of the carrier.

Drill pilot holes (remove the carrier if needed) for the lag bolts.

NOTE: If the carrier is installed onto a concrete subfloor use
concrete expansion bolts (not supplied) when securing the feet of
the carrier.

Secure the carrier to the support studs using minimum 3/8’’ x
2-1/2’’ (64 mm) long lag bolts and washers (not supplied), one at
each location.

1247365-2-B 10 Kohler Co.

Water Supply

1/2" NPT
Adapter

6. Install the Water Supply

Install the water supply line, following all local codes.
Connect the waste pipe following all applicable local codes.

Kohler Co. 11 1247365-2-B

Inlet Hole

Shield

Outlet
Hole

Plaster Guard

7. Install the Plaster Guards

Insert a plaster guard into the inlet hole in the carrier.
Insert a plaster guard into the outlet hole in the carrier.
Install the shield in the flush valve opening by snapping it into

place.

NOTE: Any parts needed for the final bowl installation should be
secured and set aside at this point to avoid losing them.

1247365-2-B 12 Kohler Co.

Front View

Cement
Board

36"
(914 mm)
Min

16"
(406 mm)
Min

8. Install the Finished Wall

CAUTION: Risk of product damage. Do not puncture the water
tank with the fasteners.

NOTE: A template to assist in cutting out the finished wall is
included on the lid of the box.

IMPORTANT! It is recommended to use cement board or tile
backer board for the wallboard backing. Gypsum board may
compromise the load strength of the bowl.

Cords

NOTE: The wall thickness should not exceed 2-3/4″ (70 mm).

Install the finished wall. Make sure the cords are accessible
through the cutout on the side of the drain pipe.

Install the bowl according to the instructions packed with the
product.

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Shield

9. Trim the Shield

NOTE: Be careful not to cut the flush control cords.

Using a utility knife, carefully trim the shield even with the
finished wall.

The trimmed off portion of the shield may be discarded.

1247365-2-B 14 Kohler Co.

Side View

Nuts

Push
Rods

10. Install the Actuator

Thread the push rods into the actuator assembly 1/8″ (3 mm)
beyond the finished wall.

If needed, trim the threaded end of the push rods.
Secure the push rods in place by tightening the nuts.

1/8"
(3 mm)
Min

Finished
Wall

Kohler Co. 15 1247365-2-B

Mounting Frame

Open Position

Lock Position

Finished
Wall

11. Install the Mounting Frame

Install the four locking pins into the mounting frame.
Turn the locking pins to the ″Open″ position.
Align the mounting frame and shield with the tank mounting

opening and install the frame.
If needed, trim the locking pins.
Turn the locking pins to the ″Lock″ position.

Care and Cleaning

WARNING: Risk of property or product damage. Do not
use in-tank cleaners in your toilet. Products containing
chlorine (calcium hypochlorite) can seriously damage fittings
in the tank. This damage can cause leakage and property
damage.

Kohler Co. shall not be responsible or liable for any tank fitting
damage caused by the use of cleaners containing chlorine (calcium
hypochlorite).

1247365-2-B 16 Kohler Co.

Care and Cleaning (cont.)

For best results, keep the following in mind when caring for your
KOHLER product:

•

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 applying cleaner. Rinse and dry any overspray that lands on
nearby surfaces.

•

Do not allow cleaners to soak on surfaces.

•

Use a soft, dampened sponge or cloth. Never use an abrasive
material such as a brush or scouring pad to clean surfaces.

•

For Artist Edition Toilets: Treat your decorative product just as
you would treat your fine china. DO NOT use bristle brushes or
abrasive-backed sponges. They will scratch decorative surfaces.
Use only warm water to clean. Dry with a cotton cloth or soft
sponge.

For detailed cleaning information and products to consider, visit
www.kohler.com/clean. To order Care & Cleaning information, call
1-800-456-4537.

Troubleshooting

For service parts information, visit www.kohler.com/serviceparts.

Symptoms Cause Recommended Action

1. Poor flush. A. Water level is

too low.

B. Improper waste

line venting.

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A. The water line should

be at the level marked
on the left side of the
tank. Raise the water
level in the tank to the
marked waterline by
turning the white
knob on the fill valve
clockwise until the
water level reaches the
waterline marked in
the tank.

B. Install venting to code.

Troubleshooting (cont.)

Symptoms Cause Recommended Action

C. Poorly adjusted

rod.

C. Check the threaded

rods behind the face
plate to make sure
that they are threaded
out far enough to
make contact with the
flush buttons. If they
are not, thread the
rods out to the correct
length and tighten
down the nuts to lock
the rods in place.

2. Running fill

valve.

A. Water level is

too high.

A. Lower the water level

in the tank by turning
the knob at the top of
the threaded rod
counterclockwise until
the fill valve shuts off
when the water level
reaches the marked
waterline in the tank.

B. Flush valve

gasket or flush
valve are

B. Replace gasket or

flush valve as
necessary.

damaged.

C. Flush valve is

sticking open.

C. Check flush valve and

actuating mechanisms
for free movement.
Push button actuators
should raise levers
then spring back
without force. Replace
components as
necessary.

4. Carrier and bowl

flex when used.

A. Insufficient

support for
frame.

A. Add additional

support members, and
mount the frame with
1/4″ or larger lag
screws.

5. No water flow. A. Supply stop

located in tank
is closed.

A. Open the supply stop

(located on the left
side).

1247365-2-B 18 Kohler Co.

Troubleshooting (cont.)

Symptoms Cause Recommended Action

B. There is an

obstruction in
the water line.

B. Close the external

supply stop,
disconnect the braided
hose where it attaches
to the fill valve. Turn
on the water supply
and check the flow
through the hose.
Continue to
investigate water path
for obstructions. Clear
any blockages.

Warranty

KOHLER Intelligent Toilet and C3 Cleansing Seat Three-Year Limited
Warranty

Kohler Co. warrants that its toilets with integrated cleansing
functionality (″Intelligent Toilets″) and electric cleansing seats will be
free of defects in material and workmanship during normal residential
use for three years from the date the product is installed. This
warranty applies only to intelligent toilets and electric cleansing seats
installed in the United States of America, Canada and Mexico (″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 where Kohler Co.’s inspection discloses any
such defect. Damage 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
other than those noted above. In no event shall the liability of Kohler
Co. exceed the purchase price of the intelligent toilet or electric
cleansing seat.

If the intelligent toilets or electric cleansing seats are used
commercially or are installed outside of North America, Kohler Co.
warrants that the intelligent toilet or electric cleansing seat will be free
from defects in material and workmanship for one (1) year from the
date the product is installed, with all other terms of this warranty
applying except duration.

Kohler Co. 19 1247365-2-B

Warranty (cont.)

If you believe that you have a warranty claim, contact your Home
Center, Dealer, Plumbing Contractor or E-tailer. Please be sure to
provide all pertinent information regarding your claim, including a
complete description of the problem, the product, model number, the
date the product was purchased, from whom the product was
purchased and the installation date. Also include your original invoice.
For other information, or to obtain the name and address of the service
and repair facility nearest you, write Kohler Co., Attn: Customer Care
Center, Kohler, Wisconsin 53044 USA, or by calling 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.

THE FOREGOING WARRANTIES ARE IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. KOHLER CO. AND/OR SELLER DISCLAIM ANY
LIABILITY FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL
DAMAGES.

Some states/provinces do not allow limitations of how long an
implied warranty lasts or the exclusion or limitation of such
damages, so these limitations and exclusions may not apply to you.
This warranty gives the consumer specific legal rights. You may also
have other rights that vary from state/province to state/province. This
warranty is to the original consumer purchaser only, and excludes
product damage due to installation error, product abuse, or product
misuse, whether performed by a contractor, service company, or the
consumer.

This is Kohler Co.’s exclusive written warranty.

* Never use cleaners containing abrasive cleansers, ammonia, bleach,
acids, waxes, alcohol, solvents or other products not recommended for
stainless steel or polypropylene plastic. This will void the warranty.

1247365-2-B 20 Kohler Co.