Index: firmware/App/Modes/ModePreGenDialysate.c
===================================================================
diff -u -r6f961c6e113a4076ba9d5f97e078a398a8976d7c -r325e67dab10f6666702bf0f1256015b31e58de4f
--- firmware/App/Modes/ModePreGenDialysate.c	(.../ModePreGenDialysate.c)	(revision 6f961c6e113a4076ba9d5f97e078a398a8976d7c)
+++ firmware/App/Modes/ModePreGenDialysate.c	(.../ModePreGenDialysate.c)	(revision 325e67dab10f6666702bf0f1256015b31e58de4f)
@@ -267,9 +267,6 @@
             break;
 
         case DD_WET_SELF_TEST_NEGATIVE_DEAERATION_PRES_CHECK:
-            //Make sure Water Inlet Valve is open
-            setValveState( M4_VALV, VALVE_STATE_OPEN );
-
             // Start timer for hyd chamber negative pressure check state
             hydChamberPressureCheckStartTimeMS = getMSTimerCount();
             // Start D12/Degassing pump - closed loop control