Kohler K-98740 Assembly instructions

Installation and Care Guide
Overhead Rain Panel
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K-98740
1207715-2-B

Tools
Important Information
NOTICE: Choose an automatic compensating valve with the
appropriate minimum flow rate to assure your valve will provide
safety at the lowest flow rates.
•For a showerhead rated at 2.5 gal/min (9.5 l/min) maximum, use
with an automatic compensating valve rated at 2.0 gal/min (7.6
l/min) or less.
Observe all local plumbing and building codes.
Inspect the supply piping for damage. Replace as necessary.
For service parts information, visit your product page at
www.kohler.com/serviceparts.
Sealant
Tape
• Close or 1-1/2" nipple
• Female fittings
• 1/2" copper tubing
• 2x2's and 2x4's
• Conventional woodworking
tools and materials
Phillips
Screwdriver
Plus:
Note: All nipples and fittings
are 1/2" NPT
5/64" & 5/32"
Hex Wrenches
Socket Wrench with 11 mm or
7/16" Socket and Extension
Masking
Tape
Soldering Supplies
1207715-2-B 2 Kohler Co.

1. Install the Supply Piping – Single Supply
Route the water supply lines.
Use the provided soldering template to construct a pressure
balancing loop.
Position tees in the loop over each of the four raised locations on
the template.
Solder the assembly while it is attached to the template.
Remove the pressure balancing loop from the template.
Connect the pressure balancing loop to the water supply.
Do not strap the pipes.
Temporarily install a nipple to each tee. Do not use any sealant.
1/2" NPT Nipple
5" (127 mm) Soldering Template
5"
(127 mm)
Pressure
Balancing Loop
Tee
Kohler Co. 3 1207715-2-B

2. Install the Supply Piping – Multiple Supplies
Route the water supply lines.
Use the provided soldering template to construct the pressure
balancing loops.
Position tees in the loops over each of the four raised locations on
the template.
Solder the assembly while it is attached to the template.
IMPORTANT! To ensure proper alignment of the tees with the
product, the two pressure balancing loops must be rigidly connected
to each other while on the soldering template.
While still on the soldering template, rigidly connect the two
pressure balancing loops to each other.
Remove the pressure balancing loop assembly from the template.
Connect the pressure balancing loops to the water supplies.
Do not strap the pipes.
Temporarily install a nipple to each tee. Do not use any sealant.
Rigidly connect
the loops to each
other while on the
template.
Pressure
Balancing
Loops 1/2" NPT Nipple
5" (127 mm) Soldering Template
5"
(127 mm)
Tee
1207715-2-B 4 Kohler Co.

3. Install the Support Framing
Construct the support framing as illustrated. The 2x2 should be
offset 1-3/16″(30 mm) from the bottom edge of the 2x4s to
support the pressure balancing loop at the proper depth.
Install the support framing under the pressure balancing loop(s).
The bottom of the 2x4s should be flush with the bottom of the
ceiling joists.
Do not strap the pipes.
2x2
2x4
2x4
2x2
2x4
2x4
9" (229 mm)
Pressure
Balancing
Loop
14-1/2"
(368 mm)
Typical
Ceiling
Joist
1-3/16"
(30 mm)
Kohler Co. 5 1207715-2-B

4. Install the Finished Ceiling
Install the water-resistant wall board.
Cut out a 9″(229 mm) to 9-1/4″(235 mm) square at the desired
installation location.
Install the finished wall material.
5. Install the Pipe Nipple
Remove the nipples.
NOTE: The minimum distance between the face of the tees/elbows
and the surface of the finished ceiling should be 2-1/4″(57 mm).
The measurement for typical installations is 2-3/4″(70 mm).
Measure the distance from the face of the tees/elbows to the
surface of the finished ceiling. Make any adjustments as needed.
If your measurement is 2-1/4″(57 mm): Use close pipe nipples.
If your measurement is 2-3/4″(70 mm): Use 1-1/2″pipe nipples.
Thread the nipple into the tee/elbow and hand tighten.
9"
(229 mm) -
9-1/4"
(235 mm)
Cutout
Finished Ceiling
Tee
Tee
Nipple
Cutout
Finished
Ceiling
2-1/4"
(57 mm)
Min
9" (229 mm) -
9-1/4" (235 mm)
9"
(229 mm) -
9-1/4"
(235 mm)
1207715-2-B 6 Kohler Co.

Install the Pipe Nipple (cont.)
Measure the distance from the end of the nipples to the surface of
the finished ceiling. Verify that the distance is at least 1-1/2″(38
mm) and no more than 1-3/4″(44 mm).
Remove the nipples.
Apply thread sealant to the threads of the nipples.
Reinstall the nipples to the tees/elbows.
Run water through the system to flush out any dirt or debris.
Kohler Co. 7 1207715-2-B

6. Install the Waterway
Insert the escutcheon into the opening.
If any of the leak shields makes contact with an elbow: Enlarge
the hole in the back of the leak shield to 1-1/4″(32 mm).
Thread the adapter onto the nipple using the provided 11 mm bit,
11 mm or 7/16″socket, extension and socket wrench. Use
masking tape to hold the bit in place, as the bit could fall off and
cause damage.
IMPORTANT! The escutcheon should sit loosely at this point. If it
is tight against the wall, use a longer pipe nipple.
Align the groove in the waterway with the double ribs on the
leak shield.
Press the waterway into place over the adapter. Secure the
waterway to the adapter with the screw provided.
Verify that the escutcheon does not turn or shift.
IMPORTANT! If the escutcheon is still loose after this step, use a
shorter pipe nipple.
Waterway
Screw
Leak Shield Escutcheon
Adapter
Extension
Socket Wrench
With Bit
1207715-2-B 8 Kohler Co.

Install the Waterway (cont.)
Repeat for the remaining waterways.
Kohler Co. 9 1207715-2-B

7. Install the Sprayhead
Using a 5/32″hex wrench, secure the sprayhead to the waterway
with the two hex screws. Do not overtighten.
Verify that the sprayhead sits squarely within the escutcheon and
tilts freely up and down.
Place the nozzle membrane over the sprayhead, aligning the long
edge of the membrane with the ribs.
NOTE: For optimum performance, ensure that the membrane is
applied evenly.
Applying pressure evenly, press the membrane seal into the
sprayhead groove.
Waterway
Sprayhead
Hex Screws
Ribs
Groove
Nozzle Membrane
Escutcheon
1207715-2-B 10 Kohler Co.