diff --git a/CADETProcess/modelBuilder/carouselBuilder.py b/CADETProcess/modelBuilder/carouselBuilder.py
index 66c66815..237d4700 100644
--- a/CADETProcess/modelBuilder/carouselBuilder.py
+++ b/CADETProcess/modelBuilder/carouselBuilder.py
@@ -140,13 +140,10 @@ def _add_inter_zone_connections(self, flow_sheet):
 
                 flow_sheet.add_connection(origin, destination)
 
-        flow_rates = self.flow_sheet.get_flow_rates()
         for zone in self.zones:
             output_state = self.flow_sheet.output_states[zone]
             flow_sheet.set_output_state(zone.outlet_unit, output_state)
 
-            zone_flow_flow_rate = flow_rates[zone.name].total_out
-
     def _add_intra_zone_connections(self, flow_sheet):
         """Add connections within zones."""
         for zone in self.zones: