Kohler K-98740 Guia De Instalacion página 7

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