Index: dialin/ui/hd_simulator.py
===================================================================
diff -u -r9ae90e7b14dc11b1f6fa631caecc75d68d7f68e8 -raf9e093318463eb6111bca2c925ffaad4f5b2773
--- dialin/ui/hd_simulator.py	(.../hd_simulator.py)	(revision 9ae90e7b14dc11b1f6fa631caecc75d68d7f68e8)
+++ dialin/ui/hd_simulator.py	(.../hd_simulator.py)	(revision af9e093318463eb6111bca2c925ffaad4f5b2773)
@@ -1202,7 +1202,7 @@
 
         self.can_interface.send(message, 0)
 
-    def cmd_send_treatment_rinseback_data(self, vTarget, vCurrent, vRate, vTimeoutTotal, vTimeoutCountDown):
+    def cmd_send_treatment_rinseback_data(self, vTarget, vCurrent, vRate, vTimeoutTotal, vTimeoutCountDown, vSafetyVolume):
         """
         the rinseback state change Response message method
         | MSG  | CAN ID | Box | Type   | Ack | Src | Dst | Description             | #1:(F32)           | #2:(F32)            | #3:(U32)         | #4:(U32)                 | #5:(U32)                     |
@@ -1214,6 +1214,7 @@
         :param vRate            : (uint ) the current flow rate in mL/min
         :param vTimeoutTotal    : (uint ) Total Timeout
         :param vTimeoutCountDown: (uint ) Current Timeout count down
+        :param vSafetyVolume    : (float) Safety Volume
         :return: None
         """
 
@@ -1222,6 +1223,7 @@
         payload += integer_to_bytearray(vRate)
         payload += integer_to_bytearray(vTimeoutTotal)
         payload += integer_to_bytearray(vTimeoutCountDown)
+        payload += float_to_bytearray(vSafetyVolume)
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.hd_to_ui_ch_id,
                                               message_id=MsgIds.MSG_ID_HD_RINSEBACK_PROGRESS.value,