Kohler K-18647 Assembly instructions

Installation and Care Guide
In-Wall Tank and Carrier
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K-18647
1247365-2-B

Tools and Materials
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.
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
1247365-2-B 2 Kohler Co.

Roughing-In
23-1/4" (590 mm)
50-15/16"
(1294 mm)
1/2" NPT
3-3/16" (80 mm)
1-9/16" (40 mm)
Centerline
of Outlet
2x4 Studs
3-3/4"
(95 mm)
2x6 Studs
5-3/16"
(132 mm)
1-3/4 (44 mm)
1/4" (6 mm)
10-7/8" (276 mm)
15-1/4"
(387 mm)
Min
23"
(584 mm)
Max
28"
(711 mm)
Kohler Co. 3 1247365-2-B

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.
2x4 Studs
or 2x6 Studs
23-1/4"
(591 mm)
PVC
Elbow
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]
1247365-2-B 4 Kohler Co.

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

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.
Mounting
Frame
PVC
Elbow
Front View
Drain
Clamp
1247365-2-B 6 Kohler Co.

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.
Back View
2x62x4
Kohler Co. 7 1247365-2-B

4. Adjust the Carrier Height
IMPORTANT! If the carrier is not correctly adjusted, the bowl rim
height may not be compliant with applicable codes.
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.
Leg
Nut
X
Finished
Floor
Mark the carrier.
2-5/8"
(67 mm)
Threaded
Rods
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

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.
Lag Bolts
1247365-2-B 10 Kohler Co.