What causes poor toilet flush?
While this can be caused from a variety of factors, the first thing to check is the water level in the tank. KOHLER toilets have a water level indicator label on the overflow tube or tank wall. Check to make sure that the water supply shut-off valve is fully open. You should also ensure that the trapway is clear and the rim holes are not obstructed by any mineral build-up. If the problem persists, check for obstructions in the soil pipe and vent pipe; these steps may require professional assistance.