Index: DDDefs.h
===================================================================
diff -u -r71b310825c5057e493a4b4c0af81163b455318a8 -r078f7c3765716782c91b91ebfa09899ef32da279
--- DDDefs.h	(.../DDDefs.h)	(revision 71b310825c5057e493a4b4c0af81163b455318a8)
+++ DDDefs.h	(.../DDDefs.h)	(revision 078f7c3765716782c91b91ebfa09899ef32da279)
@@ -173,8 +173,9 @@
     DD_GEND_STATE_START = 0,                                    ///< Gen dialysate start state
     DD_GEND_DIALYSATE_BYPASS_STATE,                             ///< Gen dialysate - Bypass dialysate state
     DD_GEND_DIALYSATE_DELIVERY_STATE,                           ///< Gen dialysate - deliver dialysate state
-    DD_GEND_DIALYSATE_DELIVERY_PAUSE,                           ///< Gen dialysate - dialysate delivery pause state
     DD_GEND_ISOLATED_UF_STATE,                                  ///< Gen dialysate - Isolated ultrafiltration state
+    DD_GEND_SPENT_CHAMBER_FILL_STATE,                           ///< Gen dialysate - spent chamber fill state
+    DD_GEND_DIALYSATE_DELIVERY_PAUSE,                           ///< Gen dialysate - dialysate delivery pause state
     NUM_OF_DD_GEND_MODE_STATES                                  ///< Number of gen dialysate states
 };
 typedef enum DD_GenD_Mode_States DD_GEND_MODE_STATE_T;          ///< Type for DD gen dialysate mode states enumeration
@@ -448,4 +449,23 @@
 
 /**@}*/
 
+/**
+ *  @addtogroup SpentChamberFill
+ *  @{
+ */
+
+/// Enumeration of Spent chamber fill exec states.
+enum Spent_Chamber_Fill_Exec_States
+{
+    SPENT_CHAMBER_FILL_STATE_START = 0,                            ///< Initial state of spent chamber fill
+    SPENT_CHAMBER_FILL_STATE1_FILL_START,                          ///< Spent chamber fill state 1 fill start state
+    SPENT_CHAMBER_FILL_STATE1_FILL_END,                            ///< Spent chamber fill state 1 fill end state
+    SPENT_CHAMBER_FILL_STATE2_FILL_START,                          ///< Spent chamber fill state 2 fill start state
+    SPENT_CHAMBER_FILL_STATE2_FILL_END,                            ///< Spent chamber fill state 2 fill end state
+    NUM_OF_SPENT_CHAMBER_FILL_EXEC_STATES                          ///< Number of spent chamber fill states
+};
+typedef enum Spent_Chamber_Fill_Exec_States SPENT_CHAMBER_FILL_EXEC_STATE_T;  ///< Type for spent chamber fill exec state enumeration
+
+/**@}*/
+
 #endif