Index: firmware/App/Modes/FlushPermeate.c
===================================================================
diff -u -r60df6fda52be699d377d3d5ec62cfb337f920706 -r44dbba513dffd7b1a997f873426407dbfc4163d1
--- firmware/App/Modes/FlushPermeate.c	(.../FlushPermeate.c)	(revision 60df6fda52be699d377d3d5ec62cfb337f920706)
+++ firmware/App/Modes/FlushPermeate.c	(.../FlushPermeate.c)	(revision 44dbba513dffd7b1a997f873426407dbfc4163d1)
@@ -1,27 +1,27 @@
 /**************************************************************************
 *
-* Copyright (c) 2024-2024 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2025-2025 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * @file    FlushPermeate.c
 *
-* @author  (last)      Michael Garthwaite
-* @date    (last)      28-Feb-2025
+* @author  (last)      “Raghu
+* @date    (last)      04-Sep-2025
 *
 * @author  (original)  Michael Garthwaite
-* @date    (original)  28-Feb-2025
+* @date    (original)  02-Jul-2025
 *
 ***************************************************************************/
 
 #include "BoostPump.h"
 #include "Conductivity.h"
 #include "FlushPermeate.h"
 #include "FPOperationModes.h"
+#include "Level.h"
 #include "MessageSupport.h"
 #include "Messaging.h"
-#include "PermeateTank.h"
 #include "Pressure.h"
 #include "ROPump.h"
 #include "TaskGeneral.h"
@@ -141,12 +141,24 @@
 static FP_PERM_FLUSH_STATE_T handlePermeateFlushProgressState( void )
 {
     FP_PERM_FLUSH_STATE_T state = PERM_FLUSH_IN_PROGRESS;
+    LEVEL_STATE_T level = getLevelStatus();
 
 //    if ( TRUE == 1 ))// TODO Alarm and Stop State Rework
 //    {
 //        state = PERM_FLUSH_PAUSED;
 //    }
 
+    // Manual control of Permeate tank while in Permeate Flush
+    // to prevent overfill.
+    if ( LEVEL_STATE_HIGH == level )
+    {
+        setValveState( M4_VALV,VALVE_STATE_CLOSED );
+    }
+    else if ( LEVEL_STATE_LOW == level )
+    {
+        setValveState( M4_VALV,VALVE_STATE_OPEN );
+    }
+
     if( TRUE == didTimeout( permeateFlushTimer, getPermeateFlushTimeout() ) )
     {
         F32 p18conductivity = getFilteredConductivity( P18_COND );
@@ -217,7 +229,6 @@
             setValveState( P39_VALV, VALVE_STATE_OPEN );
             setValveState( P20_VALV, VALVE_STATE_CLOSED );
             setValveState( P43_VALV, VALVE_STATE_CLOSED );
-            startPermeateTankControl();
             if ( TRUE == isBoostPumpInstalled() )
             {
                 setBoostPumpTargetPressure( PERMEATE_FLUSH_BOOST_PUMP_TGT_PSI );