Abstract: An automatic flush control system is shown for a toilet of the type employing a first water flow to create a waste slurry in the toilet and a second water flow to cause the waste slurry to be pumped out of the toilet to a sewer connection. An interruptible timer is provided to set the duration of each water flow period. A sensor is provided responsive to an undesired condition of the supply water to interrupt and hold the timing count of the timer in place until the undesired condition is eliminated whereupon the interrupted water flow is continued for the remaining time on the interruptible timer without undesirable prolongation of the water flow period thus avoiding a flooding condition.