Kohler C3-520 Homeowner's Manual page 18

11. Drain the Water from the Seat
CAUTION! Risk of product damage. When the seat is not used for a
long time or environmental temperature may have dropped to below
freezing, the water should be drained from the seat in advance.
Turn off the water supply and water inlet valve.
Press discharge button (at the bottom of cover).
Discharge residual water from the seat.
1350325-KR01-A
Discharge button
18 Kohler Co.