
5. Install the Finished Ceiling
Build a 5″ (127 mm) typical drop sill (including finished ceiling
material) around the mounting cradle using cut/modified 2x6
lumber.
Install the water-resistant wallboard.
IMPORTANT! The rough opening (cutout) size must be within
specified limits (refer to cutout dimensions shown above). The seal
will not cover gaps greater than 1/4″ (6 mm).
IMPORTANT! The pressure balancing loop(s) must be centered
within 1/8″ (3 mm) with the pipe nipples evenly spaced from the
edges of the rough opening.
Cut out a 20-1/4″ (514 mm) to 20-1/2″ (521 mm) square at the
desired installation location.
Install the finished ceiling material (if using tile).
Double check that the finished drop sill is the proper height
relative to the cradle. The depth from the bottom of cradle to the
finished surface should be between 3-1/2″ (89 mm) and 3-3/4″
(95 mm).
20-3/8" +/– 1/8"
(518 mm +/– 3 mm)
5" (127 mm) Typical
4-7/8" (124 mm) Min
Finished
Ceiling
3-5/8" (92 mm) Typical
3-1/2" (89 mm) Min
2x4
Ceiling Joist
2x6
Cut/Modified
Ceiling
Joist
2x4
Finished
Ceiling
Cutout
Nipple
Pressure
Balancing
Loop
Cutout
20-3/8"
+/– 1/8"
(518 mm
+/– 3 mm)
Kohler Co. 11 1207716-2-C
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