Kohler K-2975 Installation Manual page 13

Install the Valve (cont.)
NOTE: If the existing hot and cold plumbing makes this
configuration inconvenient or if it is advantageous to reverse the hot
and cold ports (such as back-to-back installations), see the "Reverse
the Inlet Supplies" section.
For K-2973 and K-2976 valves, make certain that the integral
volume control/shut-off valve portion of the assembly is on top
when installed.
Connect the water outlet lines to the valve ports. Plug any
unused outlet port.
IMPORTANT! Secure the piping to the framing.
NOTE: When using the plaster guard to trace the cut-out, the tick
marks located outside of the guard will assist you in identifying the
spline centers.
Use the plaster guard to determine the depth of the valve in the
wall, and to trace the cut-out line in the wall material.
NOTE: The finished wall must be within the MIN-MAX depth
shown on trim adapters 1, 2, and 3 of the plaster guard.
Turn on the water supply lines to the valves.
Run the water through the mixing valve, all showers, and the
spout.
Remove the plaster guard to access and inspect the valve.
Kohler Co. 13 1145568-2-A