Index: firmware/App/Modes/ModeRecirculate.c
===================================================================
diff -u -r8f5feed92f41a476d5656038bcdfe884e17bd593 -rf308cc4c35eab630ebbbde405cfe47d049afeafb
--- firmware/App/Modes/ModeRecirculate.c	(.../ModeRecirculate.c)	(revision 8f5feed92f41a476d5656038bcdfe884e17bd593)
+++ firmware/App/Modes/ModeRecirculate.c	(.../ModeRecirculate.c)	(revision f308cc4c35eab630ebbbde405cfe47d049afeafb)
@@ -1,3 +1,4 @@
+
 /**************************************************************************
 *
 * Copyright (c) 2019-2020 Diality Inc. - All Rights Reserved.
@@ -7,8 +8,8 @@
 *
 * @file ModeRecirculate.c
 *
-* @author (last) Sean Nash
-* @date (last) 06-Jul-2020
+* @author (last) Quang Nguyen
+* @date (last) 13-Aug-2020
 *
 * @author (original) Sean
 * @date (original) 04-Apr-2020
@@ -17,15 +18,18 @@
 
 #include "etpwm.h"
 
+#include "ConductivitySensors.h"
 #include "DrainPump.h"
 #include "FPGA.h"
 #include "Heaters.h"
+#include "ModeRecirculate.h"
 #include "OperationModes.h"
+#include "Pressures.h"
 #include "ROPump.h"
 #include "TaskGeneral.h"
 #include "Timers.h"
 #include "Valves.h"
-#include "ModeRecirculate.h"
+#include "TemperatureSensors.h"
 
 /**
  *  @addtogroup DGRecirculateMode
@@ -39,8 +43,8 @@
 
 // ********** private data **********
 
-static DG_RECIRCULATE_MODE_STATE_T recircState;                   ///< Currently active re-circulation state.
-static F32 flushLinesVolumeL = 0.0;                             ///< Volume of water pumped by RO pump during flush lines state.
+static DG_RECIRCULATE_MODE_STATE_T recircState;                ///< Currently active re-circulation state.
+static F32 flushLinesVolumeL = 0.0;                            ///< Volume of water pumped by RO pump during flush lines state.
 
 // ********** private function prototypes **********
 
@@ -106,6 +110,11 @@
  *************************************************************************/
 U32 execRecirculateMode( void )
 {
+    // check inlet water conductivity, temperature, and pressure
+    checkInletWaterConductivity( recircState );
+    checkInletWaterTemperature();
+    checkInletPressure();
+
     // execute current re-circulate state
     switch ( recircState )
     {