KOHLER GENUINE PART GP1138930 Silent Fill Toilet Fill Valve Kit KOHLER GENUINE PART Silent Fill provides a gracious experience by filling the tank quietly. Multiple fill-rate inserts are provided to optimize performance and conserve water. Adjustable to accommodate any height, compatible with various KOHLER toilets. Confirm shank color to determine correct part; if grey, use this part and if black, use GP1083167. Cap color may vary.