Kohler K-1018 User manual

1024937-2-A
Shower Walls and Receptor
Installation Guide
Français, Page 15
Español, Página 28
K-1018, K-9455

1024937-2-A2Kohler Co.
Thank You For Choosing Kohler Company
We appreciate your commitment to Kohler quality. 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 the back cover. Thanks again for choosing Kohler Company.
Recommended Tools and Materials
Silicone Sealant
Safety Glasses
Square
Drill Level
ShimsC-Clamps
Drill Bits,1/4”
& 5/16”
Caulk Gun
-Conventional woodworking
tools and material.
-Drop Cloth
-2x4’s or 2x6’s
-Hole saw or saber saw with
fine tooth blade (32 teeth per
inch)
-#6 Large-head galvanized
nails
Masking
Tape
Socket Wrench
W/Sockets
Open End
Wrench
Open End
Box Wrench
Tape
Measure
Claw
Hammer
Pencil & Felt
Tip Marker
Saber
Saw
Before You Begin
CAUTION: Risk of product damage. If extensive shimming is required, all dimensions must be checked and
confirmed. Take extra care when creating centerlines and marking the valve hole and showerhead location.
-Read all instructions before you begin.
-There are two sets of instructions in this installation guide, the receptor and shower wall installation which begins
on page 3, and receptor only installation, which begins on page 13. Refer to the appropriate section.
-Before removing the old unit, inspect your Kohler shower walls and receptor for damage.
-Observe all local plumbing and building codes.
-If you are remodeling, measure the existing framework before removing the old fixture to ensure the new unit
will fit. If needed add or move studs to create the proper stud configuration that is shown.
-To prevent damage, keep the shower components in a safe place until you begin the installation.
-Do not install the shower over open floor joists.
-Make sure there is sufficient access to move the module into the installation location.
-Avoid flexing the sidewalls to prevent damage to the module.
-Insulate all exterior walls before installation
-If ceiling height allows, it is recommended that the showerhead be mounted above the shower wall.
-The Kohler Model K-704516 shower door must be used with this shower module.
-Consult all applicable instructions for accessories and shower doors before beginning this installation.
-Position the rough drain according to the roughing-in dimensions.

1024937-2-A
3
Kohler Co.
7-1/4”
(18.4cm)
38-3/4” (98.4cm)
12-1/2”
(31.8cm) 16”
(40.6cm)
8” (20.3cm)
7-1/4” (18.4cm)
4-1/2” D.
(11.4cm)
N
o
t
e:
T
he con
t
r
o
l
s
hou
l
d
b
ecen
t
e
r
ed
b
e
t
w
een
t
he
s
t
ud
s
.
Adjustment of the control plumbing and location may be
needed if the wall is not plumb.
T
h
i
s
d
i
men
s
i
on
i
s
f
o
r
moun
t
i
ng
t
he
s
ho
w
e
r
he
a
d
i
n
the top of the shower wall. If you are mounting the
showerhead above the showerwall, disregard this
dimension and adjust the plumbing accordingly.
48”
(121.9cm) 75-3/8”
(191.5cm)
38-3/4”
(98.4cm)
5-1/2”
(14cm)
1. Construct the Framing
IMPORTANT! Refer to the shower door installation instructions for any special framing considerations.
NOTE: Check the dimensions of the escutcheon included with the showerhead if applicable. If the diameter of the
escutcheon exceeds 3” (7.6cm), the shower arm should be mounted above the shower wall in an appropriate spot.
-Study the roughing-in and framing diagrams.
-Add any bridging or support needed if you are installing grab bars or towel bars. Refer to the accessory
manufacturer’s instructions.
-The plumbing may be installed on either wall. The supplied dimensions should be used on either wall.
-The showerhead may be installed in the shower wall or above the shower wall. Take into account the height of the
shower users when determining the installation location. The dimension provided is for a shower wall installation
only.
-If the unit is installed against a masonry wall, use furring strips to secure the unit. The furring strip configuration
should match the stud configuration shown.
2. Install the Plumbing
-Locate the drain according to the dimensions shown above. Measure and cut the drain hole opening in the floor
and install the rough drain lines.
-Install the rough plumbing at the dimensions shown above. The rough plumbing should be in place before the
unit is installed.

1024937-2-A4Kohler Co.
Back Side Shown Back Side Shown
70”
(177.8cm)
47-1/2”
(120.7cm)
25-1/2”
(64.8cm)
3” (7.6cm)
C-Clamp
Bolt
Washer Washer
Lockwasher
Nut
Apply
caulk/sealant
here
3. Locate Wall Jambs
NOTE: Before proceeding, install the valving in the framing pocket.
-Position the walls upright on a clean, flat surface with the flanges mating as shown.
-Clamp the walls together at the top and bottom using C-clamps. Make sure the top and bottom edges are flush.
-Mark the location of the holes on the flange with a felt tip marker.
-Drill holes through both flanges with a 5/16” bit at the marked locations.
-Apply a minimum 1/4” (6mm) bead of caulk on one of the mating surfaces between the walls as shown.
-Assemble the bolt, washers, and nut at each location.
-Wrench tighten. Do not overtighten.

1024937-2-A
5
Kohler Co.
Back view of receptor on subfloor
Check level here
Subfloor
Receptor
Leveling blocks/shims should be
placed under the receptor if needed
Install the receptor with
the drain fitting attached
4. Pre-fit the Receptor in the Framing Pocket
-Assemble and install the drain according to the manufacturer’s instructions.
-Move the shower receptor into the framing pocket.
-Make sure the unit is level on all sides. If the unit is not level, shim as required to level the unit.
-Predrill the side and back nail-in flanges on the stud centers around the receptor. Do not nail the receptor in place
at this time.

1024937-2-A6Kohler Co.
Cut the valve stem hole(s) from
the front of the wall panel
Water Supply
Valve Hole Pilot Hole
Note: When determining the valve cut--out
location, measure the distance from the
top ledge of the receptor.
Note: If the showerhead
trim ring is larger than 3”
(7.6cm), it is recommended
that the showerhead be
installed above the top
edge of the shower unit if
space allows.
5. Mark and Cut the Water Supply Holes
CAUTION: Risk of injury. Wear safety glasses while cutting or drilling.
CAUTION: Risk of product damage. Check and recheck the valve and showerhead locations before drilling.
The hole(s) must be in the correct location.
-Mark the center of the supply valve on the front side of the end wall. Determine the height according to the
manufacturer’s instructions.
-The holes should align with the rough plumbing established in step 1, and should be on the centerline of the wall
panel at the correct distances from the floor.
-Refer to the valve manufacturer’s instructions for proper hole size. Make sure the valve cover plate is large
enough to cover the holes.
-Drill 1/4” (6mm) diameter pilot holes at the marked locations on the appropriate shower wall.
-From the finished surface of the wall, cut the holes required for the valving. A hole saw is preferred, but if the
correct size is not available it can be cut using a sabre-saw with a fine metal or plastic cutting blade.
-Protect the finished surface with masking tape before cutting.

1024937-2-A
7
Kohler Co.
Align these two surfaces
on both walls
8” (20.3cm)
Align these vertical
surfaces on both walls
6. Pre-fit the Shower Walls Together
NOTE: The module must be plumb and level. The shower door will not install properly if the module is not
plumb and level.
-Carefully move the wall assembly onto the receptor.
-Align the receptor and the walls.
-Check and align the walls for plumb and level.
-If walls are not plumb and level, go to section 7, “Shimming Procedures”.
-Predrill the nail-in flanges on the stud centers and around the walls on 8” (20.3cm) centers. Do not nail the walls
in place at this time.

1024937-2-A8Kohler Co.
Stud wall leaning inward Stud wall leaning outward
Shim at each nail
Shim at each nail
Note: Position the shims so they are held in place by the fasteners
whenever possible. Drill pilot holes through the shims to avoid
splitting them when the fasteners are installed.
7. Shimming Procedures
-If either wall is not plumb, it will adversely effect the fit of the wall panels to the receptor and the fit of the shower
door to the walls.
-If one or both of the stud pocket walls are leaning inward toward the receptor, the receptor will have to be moved
away from the stud pocket until the walls sit plumb.
-If one or both of the stud pocket walls are leaning outward away from the receptor, you will have to shim
between the nail-in flange of the wall and stud pocket until the shower wall is plumb.
-Depending on the severity of the out-of-plumb condition and the shimming required, you may have to move
your drain pipe and/or rough plumbing to align with the receptor in its plumb condition.

1024937-2-A
9
Kohler Co.
Apply caulk/sealant here
Figure 1 Figure 2
8. Fasten the Receptor in Place
NOTE: If the unit is shimmed, make sure the length of the fasteners is sufficient to span the shims and penetrate
into the studs at least 1” (2.5cm).
-Tack the corners of the receptor into place using #6 large-head galvanized nails (not supplied) to fasten the unit.
(Figure 1)
-Carefully remove the walls.
-Shim the receptor as needed at each of the remaining wall studs and finish nailing the receptor into place in the
predrilled holes. (Figure 2)
9. Caulk the Receptor
-Apply a bead of caulk around the receptor where the shower walls come in contact with the receptor.

1024937-2-A10 Kohler Co.
Check walls for plumb
Wallboard
2x4
Framing
Furring
Strip
Galvanized
Nail
Paperboard
Edge Down
Silicone Sealant
1/4” (6mm)
Max.
Figure 1
Figure 2
10. Fasten the Walls in Place
-Carefully move the wall assembly onto the receptor. Place the wall assembly directly onto the receptor to prevent
scraping caulk off the joint.
-Check the walls for plumb.
-Check the alignment of the receptor walls as described in section 6, “Pre-fit the Shower Walls Together .“
-Shim the walls as necessary at each predrilled hole location.
-Fasten the walls into place using #6 large-head galvanized nails. (Figure 1)
11. Finish the Wall
-Apply 1/8” (3mm) thick furring strips to the studs to ensure the wallboard installation is true and level. (Figure 2)
-Apply water-resistant sealant to the nailing-in flange.
-Install the wallboard with the factory edge (the paperbound edge) a maximum of 1/4” (6mm) above the finished,
concave surface of the walls.
-The front nailing-in flanges should be similarly furred, and the wallboard sealed to the nailing-in flange. Mud,
tape, and finish the wallboard.