Index: firmware/App/Modes/ModeRecirculate.h
===================================================================
diff -u -r138efd92a8645e0d2fe422409ef5a33dd2929a25 -rc48a99d2d1c852adcc986253b6c420a90dab7bfe
--- firmware/App/Modes/ModeRecirculate.h	(.../ModeRecirculate.h)	(revision 138efd92a8645e0d2fe422409ef5a33dd2929a25)
+++ firmware/App/Modes/ModeRecirculate.h	(.../ModeRecirculate.h)	(revision c48a99d2d1c852adcc986253b6c420a90dab7bfe)
@@ -30,12 +30,25 @@
 
 // ********** public definitions **********
 
+/// Enumeration of re-circulation mode states.
+typedef enum Recirculate_Mode_States
+{
+    RECIRCULATE_MODE_STATE_START = 0,                          ///< Start re-circulation mode state.
+    RECIRCULATE_MODE_STATE_FLUSH_LINES,                        ///< Flush lines state.
+    RECIRCULATE_MODE_STATE_RECIRC_WATER,                       ///< Re-circulate water state.
+    RECIRCULATE_MODE_STATE_PAUSE,                              ///< Pause state (pumps, heaters, lamps off).
+    NUM_OF_RECIRCULATE_MODE_STATES                             ///< Number of fill mode states.
+} RECIRCULATE_MODE_STATE_T;
+
 // ********** private function prototypes **********
 
 void initRecirculateMode( void );          // initialize this module
 void transitionToRecirculateMode( void );  // prepares for transition to Recirculate mode
 void execRecirculateMode( void );          // execute the Recirculate mode state machine (call from OperationModes)
 
+BOOL requestDGStop( void );                // HD requests DG stop (go back to standby mode)
+RECIRCULATE_MODE_STATE_T getRecirculateModeState( void );    // get the current state of re-circulate mode
+
 /**@}*/
 
 #endif