Index: DDDefs.h
===================================================================
diff -u -r6dcd6474798082bd6125fa7609c5b9d1e90c7b04 -rc90526b4ad2b98e1f081064d75406fb37eb036ef
--- DDDefs.h	(.../DDDefs.h)	(revision 6dcd6474798082bd6125fa7609c5b9d1e90c7b04)
+++ DDDefs.h	(.../DDDefs.h)	(revision c90526b4ad2b98e1f081064d75406fb37eb036ef)
@@ -7,8 +7,8 @@
 *
 * @file    DDDefs.h
 *
-* @author  (last)      “Raghu
-* @date    (last)      14-Oct-2025
+* @author  (last)      Varshini Nagabooshanam
+* @date    (last)      26-Dec-2025
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -307,7 +307,8 @@
     DD_EVENT_SUB_MODE_CHANGE,                                           ///< DD Op sub-mode change event
     DD_EVENT_OPERATION_STATUS,                                          ///< DD operation status event
     DD_EVENT_D6_LEVL_CHANGE,                                            ///< DD floater level change event
-    DD_EVENT_D63_LEVL_CHANGE,                                           ///< DD bicarb level change event
+    DD_EVENT_D63_LEVL_CHANGE,                                           ///< DD bicarb upper level change event
+    DD_EVENT_D98_LEVL_CHANGE,                                           ///< DD bicarb lower level change event
     DD_EVENT_D46_LEVL_CHANGE,                                           ///< DD spent dialysate air seperation level change event
     DD_EVENT_TD_COMMUNICATION_LOSS,                                     ///< DD TD communication loss
     DD_EVENT_TEMPERATURE_DRIFT,                                         ///< DD dialysate temperature drift
@@ -378,8 +379,8 @@
     D3_VALV,                                      ///< Valve Hydraulics Inlet (D3)
     D80_VALV,                                     ///< Valve Dry Bicarb (D80)
     D81_VALV,                                     ///< Valve De-scaler (D81)
-    LAST_HYD_VALVE = D81_VALV,                    ///< End of Hydraulics valve of group
-    RSRVD_SPACE1,                                 ///< This space has been reserved
+    D85_VALV,                                     ///< Valve DryBicart vent (D85)
+    LAST_HYD_VALVE = D85_VALV,                    ///< End of Hydraulics valve of group
     FIRST_BC_VALVE,                               ///< Start of Balancing Chamber valve group
     D23_VALV = FIRST_BC_VALVE,                    ///< Balancing chamber Valve 1 (D23)
     D19_VALV,                                     ///< Balancing chamber Valve 2 (D19)
@@ -392,12 +393,12 @@
     LAST_BC_VALVE = D22_VALV,                     ///< End of Balancing Chamber valve group
     D79_PMP_VALV,                                 ///< D79 Pump mapped to Spare valve 0
     FIRST_SP_VALVE = D79_PMP_VALV,                ///< First spare valve
-    SPARE1_VALV,                                  ///< Spare Valve 1
-    SPARE2_VALV,                                  ///< Spare Valve 2
+    D83_VALV,                                     ///< D83 Valve mapped to Spare valve 1
+    D91_VALV,                                     ///< D91 Valve mapped to Spare valve 2
     SPARE3_VALV,                                  ///< Spare Valve 3
     SPARE4_VALV,                                  ///< Spare Valve 4
     SPARE5_VALV,                                  ///< Spare Valve 5
-    SPARE6_VALV,                                  ///< Spare Valve 6
+    D100_VALV,                                    ///< D100 Valve mapped to Spare valve 6
     SPARE7_VALV,                                  ///< Spare Valve 7
     LAST_SP_VALVE = SPARE7_VALV,                  ///< Last spare valve
     LAST_DD_VALVE = LAST_SP_VALVE,                ///< Last DD valve
@@ -486,6 +487,32 @@
 };
 typedef enum Spent_Chamber_Fill_Exec_States SPENT_CHAMBER_FILL_EXEC_STATE_T;  ///< Type for spent chamber fill exec state enumeration
 
+
+/// Enumeration of DryBicart fill exec states.
+enum Dry_Bicart_Fill_Exec_States
+{
+    DRY_BICART_START_STATE = 0,                                      ///< Initial state of dry bicart fill
+    DRY_BICART_FILL_WATER_START_STATE,                               ///< Dry bicart fill start state
+    DRY_BICART_FILL_WATER_END_STATE,                                 ///< Dry bicart fill end state
+    DRY_BICART_DEGAS_START_STATE,                                    ///< Dry bicart vent start state
+    DRY_BICART_DEGAS_END_STATE,                                      ///< Dry bicart vent end state
+    DRY_BICART_FILL_DURATION_CHECK_STATE,                            ///< Dry bicart fill duration check state
+    DRY_BICART_FILL_COMPLETE_STATE,                                  ///< Dry bicart fill complete state
+    NUM_OF_DRY_BICART_FILL_EXEC_STATES                               ///< Number of dry bicart fill states
+};
+typedef enum Dry_Bicart_Fill_Exec_States DRY_BICART_FILL_EXEC_STATE_T;  ///< Type for dry bicart fill exec state enumeration
+
+/// Enumeration of Bicarb chamber fill exec states.
+enum Bicarb_Chamber_F_Fill_Exec_States
+{
+    BICARB_CHAMBER_START_STATE = 0,                                  ///< Initial state of Chamber F fill
+    BICARB_CHAMBER_CHECK_LEVEL_STATE,                                ///< Bicarb Chamber check level state
+    BICARB_CHAMBER_FILL_STATE,                                       ///< Bicarb Chamber fill start state
+    BICARB_CHAMBER_PRESSURE_CHECK_STATE,                             ///< Bicarb Chamber pressure check start state
+    NUM_OF_BICARB_CHAMBER_FILL_EXEC_STATES                           ///< Number of Bicarb chamber fill state
+};
+typedef enum Bicarb_Chamber_F_Fill_Exec_States BICARB_CHAMBER_FILL_EXEC_STATE_T;  ///< Type for bicarb chamber fill exec state enumeration
+
 /**@}*/
 
 #endif