A toilet flushing mechanism or flow control, including a lift rod carrying a bulb valve, a hand lever disposed on the outside of the water tank with linkage connecting the hand lever to the lift rod. Means is provided for restricting hand lever movement when desired to secure a limited water outflow, such means being shiftable to then secure full outflow. A balanced lever is provided to engage under stops on the lift rod to hold the same elevated. And said lever is tripped by the rod that carried a ball float, allowing the lift rod and its bulb valve to close and shut off the water flow.