Kohler K-1913 Instructions D'installation page 21

Attach the water supply to accumulator.
11. Attach the Water Supply to the Accumulator
All Installations
Attach the water supply line to the water accumulator at the inlet (3/4" NPT).
Move the drain line out of the way if the receptor tray needs to be reinstalled.
Kohler Co.
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Accumulator
Fitting
(supplied)
Receptor Tray
3/4" NPT
21
Clamp
Drain Line
Cable
Tie
1128532-2-G