Refinements in a pull-plug system now allow efficient removal of manure from shallow, totally slotted grow-finish buildings without needing extra liquid for a flush. The pull-plug flush removes manure through hydraulic force of the last 3 inches of liquid drainage from most tanks. Stored liquid from adjoining tanks is used to remove solids by a continuous flushing action, which moves solids toward the cross channel and into the drain. Plugs can be easily pulled once or twice to achieve multiple mini flushes if solid movement is a problem. Total manure removal would require pulling of all the plugs. Construction and dimensions of the system is outlined. Naturally ventilated buildings can use the pull-plug flush system.