Index: firmware/App/Controllers/AirTrap.c
===================================================================
diff -u -r8d31b2019ec67195f074853795d100a9eeb4b410 -rb61fbe40cc9d6de4d942285e2a9cfc7a60a4741c
--- firmware/App/Controllers/AirTrap.c	(.../AirTrap.c)	(revision 8d31b2019ec67195f074853795d100a9eeb4b410)
+++ firmware/App/Controllers/AirTrap.c	(.../AirTrap.c)	(revision b61fbe40cc9d6de4d942285e2a9cfc7a60a4741c)
@@ -471,7 +471,7 @@
         airTrapWasFilledAtStartOfTreatement = TRUE;
 
         set3WayValveState( H20_VALV, VALVE_3WAY_COMMON_TO_CLOSED_STATE );
-        set3WayValveState( H13_VALV, VALVE_3WAY_COMMON_TO_CLOSED_STATE );
+        set3WayValveState( H13_VALV, VALVE_3WAY_COMMON_TO_OPEN_STATE );
 
         setAirPumpState( AIR_PUMP_STATE_OFF, AIR_PUMP_MOTOR_OFF );