Index: leahi_dialin/dd/modules/valves.py
===================================================================
diff -u -r7a827f82f5866f5780a0a679920b1e7b75280efd -ra86c438ad4724d63a8aef56f5ae4e9cecab1718c
--- leahi_dialin/dd/modules/valves.py	(.../valves.py)	(revision 7a827f82f5866f5780a0a679920b1e7b75280efd)
+++ leahi_dialin/dd/modules/valves.py	(.../valves.py)	(revision a86c438ad4724d63a8aef56f5ae4e9cecab1718c)
@@ -366,6 +366,61 @@
             self.logger.debug("Timeout!!!!")
             return False
 
+    def cmd_bc_valves_override(self, bcv1: bool, bcv2: bool, bcv3: bool, bcv4: bool, bcv5: bool, bcv6: bool, bcv7: bool, bcv8: bool) -> int:
+        """
+        Constructs and sends the balancing chamber valve states override command.
+        Constraints:
+            Must be logged into DG.
+            Given valve ID must be one of the valve IDs listed below.
+
+        @param bcv1:  bool - valve state for BCV1 (true=open, false=closed)
+        @param bcv2:  bool - valve state for BCV2 (true=open, false=closed)
+        @param bcv3:  bool - valve state for BCV3 (true=open, false=closed)
+        @param bcv4:  bool - valve state for BCV4 (true=open, false=closed)
+        @param bcv5:  bool - valve state for BCV5 (true=open, false=closed)
+        @param bcv6:  bool - valve state for BCV6 (true=open, false=closed)
+        @param bcv7:  bool - valve state for BCV7 (true=open, false=closed)
+        @param bcv8:  bool - valve state for BCV8 (true=open, false=closed)
+        @return: 1 if successful, zero otherwise
+        """
+
+        valve = 0
+        if bcv1:
+            valve = valve | 0x1
+        if bcv2:
+            valve = valve | 0x2
+        if bcv3:
+            valve = valve | 0x4
+        if bcv7:
+            valve = valve | 0x8
+        if bcv5:
+            valve = valve | 0x10
+        if bcv6:
+            valve = valve | 0x20
+        if bcv4:
+            valve = valve | 0x40
+        if bcv8:
+            valve = valve | 0x80
+
+        payload = integer_to_bytearray(valve)
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dd_ch_id,
+                                              message_id=MsgIds.MSG_ID_DD_BC_VALVE_STATES_OVERRIDE_REQUEST.value,
+                                              payload=payload)
+
+        self.logger.debug("Override balancing chamber valve states")
+
+        # 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.debug("Timeout!!!!")
+            return False
+
     def cmd_valve_broadcast_interval_override(self, ms: int, reset: int = NO_RESET) -> int:
         """
         Constructs and sends the valve state override command.