diff --git a/DaSaSo.ViewModel/Controls/SewerRhebalationControllViewModel.cs b/DaSaSo.ViewModel/Controls/SewerRhebalationControllViewModel.cs
index 5f4adbb..97300e4 100644
--- a/DaSaSo.ViewModel/Controls/SewerRhebalationControllViewModel.cs
+++ b/DaSaSo.ViewModel/Controls/SewerRhebalationControllViewModel.cs
@@ -83,5 +83,10 @@ namespace DaSaSo.ViewModel.Controls
             SewerPreperationControllViewModel = new SewerPreperationControllViewModel(model.PreparationType);
             _date = model.Date.ToDateTime(new TimeOnly(0));
         }
+        public override void Dispose()
+        {
+            model.PreparationType = SewerPreperationControllViewModel.CalculatePreparationFlags();
+            base.Dispose();
+        }
     }
 }
diff --git a/DaSaSo.ViewModel/SewerPipeLinerViewModel.cs b/DaSaSo.ViewModel/SewerPipeLinerViewModel.cs
index dcfcd04..54fbbf2 100644
--- a/DaSaSo.ViewModel/SewerPipeLinerViewModel.cs
+++ b/DaSaSo.ViewModel/SewerPipeLinerViewModel.cs
@@ -117,6 +117,7 @@ namespace DaSaSo.ViewModel
             //Model.PreparationType = preparationFlags;
             //SewerPreperationControllViewModel.Dispose();
             //Debugger.Break();
+            SewerRhebalationControllViewModel.Dispose();
             base.Dispose();
         }
     }
diff --git a/DaSaSo.Wpf/View/SewerObjecte/SewerObjecteListView.xaml b/DaSaSo.Wpf/View/SewerObjecte/SewerObjecteListView.xaml
index 5aa29e1..4252e7d 100644
--- a/DaSaSo.Wpf/View/SewerObjecte/SewerObjecteListView.xaml
+++ b/DaSaSo.Wpf/View/SewerObjecte/SewerObjecteListView.xaml
@@ -31,16 +31,10 @@
                             <TextBlock Text="] Hausnummer [" />
                             <TextBlock Text="{Binding Hausnummer}" Foreground="Red" />
                             <TextBlock Text="] Haltung [" />
-                            <!--<TextBlock Text="[" />-->
                             <TextBlock Foreground="Blue" Text="{Binding ObjektName}" />
                             <TextBlock Text="] DN [" />
                             <TextBlock Text="{Binding DN}" Foreground="Blue" />
                             <TextBlock Text="]" />
-                            <!--
-                            <TextBlock Text="] Material [" />
-                            <TextBlock Text="{Binding Material}" Foreground="Blue" />
-                            <TextBlock Text="]" />
-                            -->
                         </StackPanel>
                     </DataTemplate>
                     <Style TargetType="{x:Type TreeViewItem}">