Kohler K-304 Guía De Instalación Y Cuidado página 8

Position the Valve and Route Piping (cont.)
Solder all needed connections.
Temporarily install 1/2" pipe nipples to the elbows so they will
extend at least 2" (51 mm) beyond the finished wall.
Install caps to both pipe nipples.
1110626-2-J 8 Kohler Co.