Adjust toilet bowl water level by modifying the tank water level and refill tube. For float-cup fill valves turn the adjustment screw clockwise to raise water level. Ball-float models require bending the float arm slightly upward. The water level should be about one inch below the overflow tube top. Ensure the refill tube is properly clipped to the overflow pipe to direct water into the bowl during refilling. Flush and check the bowl level after adjustments.