Kohler K-45905 Instructions D'installation page 6

1/2"-14 NPT Elbow
Roughing-In - Upper Supply Connection
Measure the distance between the 1/2"-14 NPT elbow and the
finished wall surface. The distance must be between 1-3/8" (35
mm) and 2-7/8" (73 mm).
IMPORTANT! The shower column connection will not seal
properly if the distance exceeds 2-7/8" (73 mm); see below for the
required deep roughing-in kit.
If the distance is between 2-7/8" (73 mm) and 4" (102 mm):
Order the 1194630 Deep Roughing-in Kit.
If the distance is less than 1-3/8" (35 mm): Order the 1187917
Shallow Roughing-in Kit.
1189046-2-A
1-3/8" (35 mm) –
2-7/8" (73 mm)
1" (25 mm) Maximum
Wall Surface Offset
1-3/4" (44 mm)
Minimum
Escutcheon
Clearance
Finished Wall Surface
4 Kohler Co.