Index: leahi_dialin/common/msg_ids.py
===================================================================
diff -u -rc5493e8477c3bd058517d2c56a7460357bfc029e -re16372ac648dd4efca346c889348b08c8653ee17
--- leahi_dialin/common/msg_ids.py	(.../msg_ids.py)	(revision c5493e8477c3bd058517d2c56a7460357bfc029e)
+++ leahi_dialin/common/msg_ids.py	(.../msg_ids.py)	(revision e16372ac648dd4efca346c889348b08c8653ee17)
@@ -286,6 +286,7 @@
     MSG_ID_DD_DRY_BICART_FILL_CYCLE_MAX_OVERRIDE_REQUEST = 0xA055
     MSG_ID_DD_DRY_BICART_FILL_REQUEST_OVERRIDE_REQUEST = 0xA056
     MSG_ID_DD_BICARB_CHAMBER_FILL_REQUEST_OVERRIDE_REQUEST = 0xA057
+    MSG_ID_DD_BICART_DRAIN_REQUEST_OVERRIDE_REQUEST = 0xA058
 
     # Placeholder messages
     MSG_ID_DD_ALARM_STATE_OVERRIDE_REQUEST = 0xAF03
Index: leahi_dialin/common/test_config_defs.py
===================================================================
diff -u -r9c785697827d1a21021b48b57d5a14f157856ec2 -re16372ac648dd4efca346c889348b08c8653ee17
--- leahi_dialin/common/test_config_defs.py	(.../test_config_defs.py)	(revision 9c785697827d1a21021b48b57d5a14f157856ec2)
+++ leahi_dialin/common/test_config_defs.py	(.../test_config_defs.py)	(revision e16372ac648dd4efca346c889348b08c8653ee17)
@@ -20,11 +20,9 @@
 
 @unique
 class DDTestConfigOptions(DialinEnum):
-    TEST_CONFIG_BETA_HW =  0                                    # Test configuration using Beta Hardware
-    TEST_CONFIG_DISABLE_BC_PRES_ALARM = 1                       # Test configuration disabling BC pressure alarms
-    TEST_CONFIG_DISABLE_DIENER_CONC_PUMP = 2                    # Test configuration disabling Diener concentrate pump
-    TEST_CONFIG_ENABLE_4WIRE_RINSE_PUMP = 3                     # Test configuration Enabling 4 wire rinse pump
-    NUM_OF_TEST_CONFIGS = 4                                     # Number of Test Configs
+    TEST_CONFIG_DISABLE_BC_PRES_ALARM = 0                       # Test configuration disabling BC pressure alarms
+    TEST_CONFIG_ENABLE_DRY_BICART_FILL = 1                      # Test configuration for enabling drybicart fill
+    NUM_OF_TEST_CONFIGS = 2                                     # Number of Test Configs
 
 @unique
 class FPTestConfigOptions(DialinEnum):
Index: leahi_dialin/dd/modules/drybicart.py
===================================================================
diff -u -rc5493e8477c3bd058517d2c56a7460357bfc029e -re16372ac648dd4efca346c889348b08c8653ee17
--- leahi_dialin/dd/modules/drybicart.py	(.../drybicart.py)	(revision c5493e8477c3bd058517d2c56a7460357bfc029e)
+++ leahi_dialin/dd/modules/drybicart.py	(.../drybicart.py)	(revision e16372ac648dd4efca346c889348b08c8653ee17)
@@ -49,19 +49,21 @@
 
         self.dd_dry_bicart_fill_execution_state = 0
         self.dd_bicarb_chamber_fill_execution_state = 0
+        self.dd_dry_bicart_drain_execution_state = 0
         self.dd_dry_bicart_fill_cycle_counter = 0
         self.dd_dry_bicart_max_fill_cycle_count = 0
         self.dd_dry_bicart_fill_request = 0
         self.dd_bicarb_chamber_fill_request = 0
+        self.dd_dry_bicart_drain_request = 0
         self.dd_dry_bicart_last_fill_time = 0
         self.dd_dry_bicart_current_fill_time = 0
         self.dd_dry_bicart_timestamp = 0
 
     @publish(["msg_id_dd_dry_bicart_data",
-              "dd_dry_bicart_fill_execution_state", "dd_bicarb_chamber_fill_execution_state",
+              "dd_dry_bicart_fill_execution_state", "dd_bicarb_chamber_fill_execution_state", "dd_dry_bicart_drain_execution_state",
               "dd_dry_bicart_fill_cycle_counter", "dd_dry_bicart_max_fill_cycle_count",
-              "dd_dry_bicart_fill_request", "dry_bicarb_chamber_fill_request", "dd_dry_bicart_last_fill_time",
-              "dd_dry_bicart_current_fill_time",
+              "dd_dry_bicart_fill_request", "dry_bicarb_chamber_fill_request", "dd_dry_bicart_drain_request",
+              "dd_dry_bicart_last_fill_time", "dd_dry_bicart_current_fill_time",
               "dd_dry_bicart_timestamp"])
     def _handler_dry_bicart_sync(self, message, timestamp=0.0):
         """
@@ -75,18 +77,22 @@
             message['message'][MsgFieldPositions.START_POS_FIELD_1:MsgFieldPositions.END_POS_FIELD_1]))[0]
         self.dd_bicarb_chamber_fill_execution_state = struct.unpack('I', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_2:MsgFieldPositions.END_POS_FIELD_2]))[0]
-        self.dd_dry_bicart_fill_cycle_counter = struct.unpack('I', bytearray(
+        self.dd_dry_bicart_drain_execution_state = struct.unpack('I', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_3:MsgFieldPositions.END_POS_FIELD_3]))[0]
-        self.dd_dry_bicart_max_fill_cycle_count = struct.unpack('I', bytearray(
+        self.dd_dry_bicart_fill_cycle_counter = struct.unpack('I', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_4:MsgFieldPositions.END_POS_FIELD_4]))[0]
-        self.ddd_dry_bicart_fill_request = struct.unpack('I', bytearray(
+        self.dd_dry_bicart_max_fill_cycle_count = struct.unpack('I', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_5:MsgFieldPositions.END_POS_FIELD_5]))[0]
-        self.dd_bicarb_chamber_fill_request = struct.unpack('I', bytearray(
+        self.ddd_dry_bicart_fill_request = struct.unpack('I', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_6:MsgFieldPositions.END_POS_FIELD_6]))[0]
-        self.dd_dry_bicart_last_fill_time = struct.unpack('I', bytearray(
+        self.dd_bicarb_chamber_fill_request = struct.unpack('I', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_7:MsgFieldPositions.END_POS_FIELD_7]))[0]
-        self.dd_dry_bicart_current_fill_time = struct.unpack('I', bytearray(
+        self.ddd_dry_bicart_drain_request = struct.unpack('I', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_8:MsgFieldPositions.END_POS_FIELD_8]))[0]
+        self.dd_dry_bicart_last_fill_time = struct.unpack('I', bytearray(
+            message['message'][MsgFieldPositions.START_POS_FIELD_9:MsgFieldPositions.END_POS_FIELD_9]))[0]
+        self.dd_dry_bicart_current_fill_time = struct.unpack('I', bytearray(
+            message['message'][MsgFieldPositions.START_POS_FIELD_10:MsgFieldPositions.END_POS_FIELD_10]))[0]
 
         self.dd_dry_bicart_timestamp = timestamp
 
@@ -220,3 +226,32 @@
         else:
             self.logger.error("Timeout!!!!")
             return False
+    def cmd_dry_bicart_drain_request_override(self, start_stop: int, reset: int = NO_RESET) -> int:
+        """
+        Constructs and sends the dry bicart drain request override command
+        Constraints:
+            Must be logged into DD.
+
+        @param start_stop:  int - value to start or stop dry bicart drain ( start = 1, stop = 0
+        @return: 1 if successful, zero otherwise
+
+        """
+
+        request = integer_to_bytearray(start_stop)
+        reset_byte_array = integer_to_bytearray(reset)
+        payload = reset_byte_array + request
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dd_ch_id,
+                                              message_id=MsgIds.MSG_ID_DD_BICART_DRAIN_REQUEST_OVERRIDE_REQUEST.value,
+                                              payload=payload)
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content...
+        if received_message is not None:
+            # response payload is OK or not OK
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.error("Timeout!!!!")
+            return False
\ No newline at end of file