Index: firmware/App/Modes/ModeFlush.c
===================================================================
diff -u -r2a791a59f7336f63b07e310446435af0b16969a5 -rbb8d23755bc6f2d3016bde413fbdd32d31fa9838
--- firmware/App/Modes/ModeFlush.c	(.../ModeFlush.c)	(revision 2a791a59f7336f63b07e310446435af0b16969a5)
+++ firmware/App/Modes/ModeFlush.c	(.../ModeFlush.c)	(revision bb8d23755bc6f2d3016bde413fbdd32d31fa9838)
@@ -311,6 +311,9 @@
     // Set the actuators to drain R1
     setValveState( VRD1, VALVE_STATE_OPEN );
 
+    // Set VPO
+    setValveState( VPO, VALVE_STATE_FILL_C_TO_NC);
+
     setDrainPumpTargetRPM( DRAIN_PUMP_TARGET_RPM );
 
     flushUIState = FLUSH_UI_STATE_DRAIN_DEVICE;
@@ -352,6 +355,8 @@
         // Set the actuators to drain R2
         // NOTE: Drain pump is already on and VDr is already on drain state
         setValveState( VRD2, VALVE_STATE_OPEN );
+        // Set VPO
+        setValveState( VPO, VALVE_STATE_FILL_C_TO_NC);
 
         stateTimerStart = getMSTimerCount();
         rsrvr2Status = DG_RESERVOIR_ABOVE_TARGET;
@@ -666,6 +671,8 @@
             // Close VPi and VPd to drain
             setValveState(VPI, VALVE_STATE_CLOSED);
             setValveState(VPD, VALVE_STATE_DRAIN_C_TO_NO);
+            // Set VPO
+            setValveState( VPO, VALVE_STATE_FILL_C_TO_NC);
 
             stateTimerStart = getMSTimerCount();
             isThisInitialDrain = FALSE;