Index: HDDefs.h
===================================================================
diff -u -r1841f63f8a1715d14809a3edb4e15c5d12ebda86 -rd82c9506c6d4993b087bb3baecd4ad50367d60f1
--- HDDefs.h	(.../HDDefs.h)	(revision 1841f63f8a1715d14809a3edb4e15c5d12ebda86)
+++ HDDefs.h	(.../HDDefs.h)	(revision d82c9506c6d4993b087bb3baecd4ad50367d60f1)
@@ -137,6 +137,26 @@
     NUM_OF_HD_PRE_TREATMENT_STATES                                          ///< Number of pre-treatment mode states
 };
 typedef enum HD_Pre_Treatment_Mode_States HD_PRE_TREATMENT_MODE_STATE_T;    ///< Type for HD pre-treatment mode states enumeration
+
+/// Enumeration of sample water sub-mode states.
+enum Sample_Water_States
+{
+    SAMPLE_WATER_SETUP_STATE = 0,                               ///< Sample water setup state of the sample water sub-mode state machine
+    SAMPLE_WATER_STATE,                                         ///< Sample water state of the sample water sub-mode state machine
+    NUM_OF_SAMPLE_WATER_STATES                                  ///< Number of sample water sub-mode states
+};
+typedef enum Sample_Water_States SAMPLE_WATER_STATE_T;          ///< Type for sample water states enumeration.
+
+
+/// Enumeration of user actions that may be requested from sample water sub-mode.
+enum Requested_Sample_Water_User_Actions
+{
+    REQUESTED_USER_ACTION_SAMPLE_WATER_STOP = 0,                ///< User requests to stop sample water
+    REQUESTED_USER_ACTION_SAMPLE_WATER_START = 1,               ///< User requests to start sample water
+    NUM_OF_REQUESTED_SAMPLE_WATER_USER_ACTIONS                  ///< Number of requested sample water user actions
+};
+/// Type for requested user actions enumeration.
+typedef enum Requested_Sample_Water_User_Actions REQUESTED_SAMPLE_WATER_USER_ACTIONS_T;
 
 /**@}*/