Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r3d8da969460b0a8d118cd1f4ccc4883b5436f730 -r2b2cf776b2e1dec6d61c3a4150a4b5d838b4f911
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 3d8da969460b0a8d118cd1f4ccc4883b5436f730)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 2b2cf776b2e1dec6d61c3a4150a4b5d838b4f911)
@@ -1132,6 +1132,37 @@
 
 /*********************************************************************//**
  * @brief
+ * The handleParkConecentratePumpsCmd function handles a DG concentrate pumps park
+ * command message from the HD.
+ * @details Inputs: none
+ * @details Outputs: message handled
+ * @param message a pointer to the message to handle
+ * @return none
+ *************************************************************************/
+void handleParkConecentratePumpsCmd( MESSAGE_T *message )
+{
+    BOOL result = FALSE;
+
+    if ( message->hdr.payloadLen == 0 )
+    {
+        DG_CMD_RESPONSE_T cmdResponse;
+        cmdResponse.commandID  = DG_CMD_PARK_CONCENTRATE_PUMPS;
+        cmdResponse.rejected   = FALSE;
+        cmdResponse.rejectCode = DG_CMD_REQUEST_REJECT_REASON_NONE;
+        result                 = TRUE;
+
+        // Park both acid and Bicarb concentrate pumps
+        requestConcentratePumpOff( CONCENTRATEPUMPS_CP1_ACID, PARK_CONC_PUMPS );
+        requestConcentratePumpOff( CONCENTRATEPUMPS_CP2_BICARB, NO_PARK_CONC_PUMPS );
+
+        sendCommandResponseMsg( &cmdResponse );
+    }
+
+    sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_DG_2_HD, result );
+}
+
+/*********************************************************************//**
+ * @brief
  * The handleStartStopTrimmerHeaterCmd function handles a trimmer heater start/stop
  * command message from the HD.
  * @details Inputs: none