Index: firmware/App/Modes/FPModes/StateFlushPermeate.c
===================================================================
diff -u -r9f7c5de17f8e3d832da0888f138fb7602cc33a78 -r973f790125e70115662d979f5f5631bb9df081f0
--- firmware/App/Modes/FPModes/StateFlushPermeate.c	(.../StateFlushPermeate.c)	(revision 9f7c5de17f8e3d832da0888f138fb7602cc33a78)
+++ firmware/App/Modes/FPModes/StateFlushPermeate.c	(.../StateFlushPermeate.c)	(revision 973f790125e70115662d979f5f5631bb9df081f0)
@@ -1,17 +1,17 @@
 /**************************************************************************
 *
-* Copyright (c) 2025-2026 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2026-2026 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    StateFlushPermeate.c
 *
 * @author  (last)      “rkallala”
-* @date    (last)      15-Jan-2026
+* @date    (last)      29-Jan-2026
 *
-* @author  (original)  Michael Garthwaite
-* @date    (original)  08-Sep-2025
+* @author  (original)  “rkallala”
+* @date    (original)  16-Jan-2026
 *
 ***************************************************************************/
 
@@ -40,7 +40,7 @@
 #define PERMEATE_FLUSH_DATA_PUBLISH_INTERVAL        ( MS_PER_SECOND / TASK_GENERAL_INTERVAL )   ///< Interval (ms/task time) at which the gen water mode data published.
 #define PERMEATE_FLUSH_TIMEOUT                      ( 2 * SEC_PER_MIN * MS_PER_SECOND )         ///< Permeate flush timer (in ms) timeout for 2 minutes
 #define PERMEATE_FLUSH_ALARM_TIMEOUT                ( 5 * SEC_PER_MIN * MS_PER_SECOND )         ///< Permeate flush alarm timer (in ms) timeout for 5 minutes
-#define PERMEATE_FLUSH_RO_PUMP_TGT_ML               700                                         ///< Pressure target in ml/min for the RO pump during permeate flush.
+#define PERMEATE_FLUSH_RO_PUMP_TGT_ML               800                                         ///< Pressure target in ml/min for the RO pump during permeate flush.
 #define PERMEATE_FLUSH_BOOST_PUMP_TGT_PSI           25                                          ///< Pressure target in PSI for the boost pump during permeate flush.
 #define PERMEATE_FLUSH_CONDUCTIVITY_THRESHOLD       200.0F                                      ///< Conductivity alarm threshold for permeate flush.
 #define MIN_BOOST_PUMP_DUTY_CYCLE_PCT               0.5F                                        ///< Minimum duty cycle value for boost pump during open loop control
@@ -174,6 +174,12 @@
         checkROInletPressure();
     }
 
+    // check low flow rate is within range
+    checkPermeateLowFlow();
+
+    // check permeate high flow rate is within range
+    checkPermeateHighFlow();
+
     if ( TRUE == didTimeout( permeateFlushTimer, getPermeateFlushTimeout() ) )
     {
         F32 p18conductivity = getFilteredConductivity( P18_COND );