Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r780d9a73fe04ddd85282c413fbe5984f374f2b61 -rf94085c6fbf817a07db7225d6748b5347dfb12d3
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 780d9a73fe04ddd85282c413fbe5984f374f2b61)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision f94085c6fbf817a07db7225d6748b5347dfb12d3)
@@ -569,7 +569,7 @@
  * @param drainToVolumeMl volume (in mL) to drain the inactive reservoir to
  * @return TRUE if msg successfully queued for transmit, FALSE if not
  *************************************************************************/
-BOOL sendDGDrainCommand( U32 drainToVolumeMl )
+BOOL sendDGDrainCommand( DRAIN_RESERVOIR_CMD_PAYLOAD_T *drainCmdPtr )
 {
     BOOL result;
     MESSAGE_T msg;
@@ -578,9 +578,9 @@
     // create a message record
     blankMessage( &msg );
     msg.hdr.msgID = MSG_ID_DG_DRAIN_CMD;
-    msg.hdr.payloadLen = sizeof( U32 );
+    msg.hdr.payloadLen = sizeof( DRAIN_RESERVOIR_CMD_PAYLOAD_T );
 
-    memcpy( payloadPtr, &drainToVolumeMl, sizeof( U32 ) );
+    memcpy( payloadPtr, drainCmdPtr, sizeof( DRAIN_RESERVOIR_CMD_PAYLOAD_T ) );
 
     // serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
     result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_DG, ACK_REQUIRED );