Kohler Components K-77990-8-CP Guide D'installation Et D'entretien page 4

Prepare the Site (cont.)
NOTICE: Do not exceed 1-1/2" (38 mm) hole diameters for the
spout and valve body mounting holes. Maximum contact area is
necessary for a successful installation.
Carefully cut mounting holes for the spout and valve bodies.
Install or relocate the water supplies as needed.
1317801-2-A 4 Kohler Co.