HEIMLICH TYPE SIMPLE VALVES ARE USED TO SECURE CHEST DRAINAGE SYSTEMS. THE DOUBLE SUCTION AND DISCHARGE VALVE IS USED DURING TRANSPORT OR WHEN THERE IS NO VACUUM SOURCE AVAILABLE. THE SIMPLE VALVE WITH INTERMEDIATE LUER-LOCK CONNECTION IS FITTED ON THE PLEUROCATH® PLEURAL DRAINAGE CATHETERS. AN ARROW INDICATES FLOW DIRECTION (FROM LUNG TO CONTAINER). THIS MODEL INCLUDES : • 1 simple or double unidirectional valve • Connecting unit