09/21/2026
Does your toilet tank fill normally, but the water level in the toilet bowl stays low or doesn't refill after you flush? If the tank refills correctly, but the bowl doesn't fill up after flushing, the problem is related to your fill valve. If the refill tube is loose or disconnected, water will enter the tank, not the bowl. If water is not flowing from the refill tube into the overflow tube, check if your fill valve has a bowl refill adjuster. Make sure the dial is turned to the fully open position. Then you can fine tune the toilet bowl. If little or no water flows through the refill tube, debris or mineral buildup is likely clogging the fill valve. You can fix this by rinsing the cap with warm water. For full steps to service your Korky fill valve and clean the cap. Mineral buildup can sometimes be harder to remove in older valves, and cleaning may not always work. In that case, you can replace the fill valve cap without replacing the entire valve.