this water goes immediately to sewer 128 via flow line 127 see arrow 140 fig5 and open drain valve 130 module 3 the empty pocket module remains empty of water the valve conditions shown in fig5 accompany an empty pocket of module 3 this valve condition moves with the u201c empty pocket u201d as it moves from one module to the next module through the tunnel washer 11 in the direction of arrows 17 18 in the method and apparatus of fig4 and 5 the u201c empty pocket u201d is first placed in module 1 then moves to module 2 then 3 then to each subsequent module in sequence 4 5 6 7 8 9 until the empty pocket reaches the last module 10 in this case where module 10 is the empty pocket the controller will signal the receiving apparatus such as a press or an extractor that there is no linen in the press or extractor so that it does not cycle counterflow in washer 11 is controlled by the counterflow valves 132 133 134 135 counterflow is permitted when the valve 133 for flow from module 3 to the previous module 2 is open and the valve 136 for flow to the sewer 128 is closed counterflow is prevented when the valve states are opposite although counterflow would be possible between module 3 and module 2 in.