Index: firmware/App/Services/Reservoirs.c
===================================================================
diff -u -r55425a4c5370a6fa1faad61dc24fcd76b854d3ed -r6145c5d1a645646587fb077df3c61eef2354f744
--- firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision 55425a4c5370a6fa1faad61dc24fcd76b854d3ed)
+++ firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision 6145c5d1a645646587fb077df3c61eef2354f744)
@@ -160,6 +160,54 @@
 
     sendCommandResponseMsg( &cmdResponse );
 }
+
+/*********************************************************************//**
+ * @brief
+ * The changeValveSettingCmd function changes valve settings according to
+ * the given setting ID.
+ * @details Inputs: none
+ * @details Outputs: Specified valve settings has been setup.
+ * @param valveSettingID ID of valve setting to change valves to
+ * @return none
+ *************************************************************************/
+void changeValveSettingCmd( VALVE_SETTING_ID_T valveSettingID )
+{
+    DG_CMD_RESPONSE_T cmdResponse;
+
+    cmdResponse.commandID = DG_CMD_VALVE_SETTING;
+    cmdResponse.rejected = TRUE;
+    cmdResponse.rejectCode = DG_CMD_REQUEST_REJECT_REASON_NONE;
+
+    // valve setting command only valid in re-circulate mode
+    if ( DG_MODE_CIRC == getCurrentOperationMode() )
+    {
+        switch ( valveSettingID )
+        {
+            case VALVE_SETTING_R1_TO_R2:
+                cmdResponse.rejected = FALSE;
+                setValveState( VRO, VALVE_STATE_R1_C_TO_NO );
+                setValveState( VRI, VALVE_STATE_R2_C_TO_NC );
+                break;
+
+            case VALVE_SETTING_R2_TO_R1:
+                cmdResponse.rejected = FALSE;
+                setValveState( VRO, VALVE_STATE_R2_C_TO_NC );
+                setValveState( VRI, VALVE_STATE_R1_C_TO_NO );
+                break;
+
+            default:
+                // invalid reservoir given - cmd will be NAK'd w/ false result.
+                cmdResponse.rejectCode = DG_CMD_REQUEST_REJECT_REASON_INVALID_PARAMETER;
+                break;
+        }
+    }
+    else
+    {
+        cmdResponse.rejectCode = DG_CMD_REQUEST_REJECT_REASON_INVALID_MODE;
+    }
+
+    sendCommandResponseMsg( &cmdResponse );
+}
 
 /*********************************************************************//**
  * @brief