diff --git a/src/configs/rotatingMachine.json b/src/configs/rotatingMachine.json
index 2c83be7..6ef9955 100644
--- a/src/configs/rotatingMachine.json
+++ b/src/configs/rotatingMachine.json
@@ -412,6 +412,14 @@
         ],
         "description": "The frequency at which calculations are performed."
       }
+    },
+    "flowNumber": {
+      "default": 1,
+      "rules": {
+        "type": "number",
+        "nullable": false,
+        "description": "Defines which effluent flow of the parent node to handle."
+      }
     }
   }
   
\ No newline at end of file