Kohler K-9132-BRZ Guide D'installation page 4

See fixture
instructions.
Subfloor
1. Prepare the Site
The 2" NPT (2-3/8" OD) drain pipe must extend as specified for
the fixture. Consult the fixture installation instructions.
Provide a 4-5/8" (11.7 cm) D. minimum hole in the subfloor to
accommodate the 4-1/2" (11.4 cm) shower drain nut. Provide a
minimum working depth of 1-1/2" (3.8 cm) to accommodate the
shower drain nut, washer, gasket, and strainer body.
1032220-2-B
2" NPT
2-3/8" OD
1/4" (6 mm)
4-5/8"
(11.7 cm) Min
4
1-1/2"
(3.8 cm)
Min
Kohler Co.