Index: sources/gui/qml/pages/pretreatment/PreTreatmentPrimeStack.qml
===================================================================
diff -u -rc15ce613e372838316d42c40a86953e6f0aa05d3 -r73091a6f5717c0fc88e236c06c618ad361f30a3c
--- sources/gui/qml/pages/pretreatment/PreTreatmentPrimeStack.qml	(.../PreTreatmentPrimeStack.qml)	(revision c15ce613e372838316d42c40a86953e6f0aa05d3)
+++ sources/gui/qml/pages/pretreatment/PreTreatmentPrimeStack.qml	(.../PreTreatmentPrimeStack.qml)	(revision 73091a6f5717c0fc88e236c06c618ad361f30a3c)
@@ -29,13 +29,15 @@
 
     stackView.initialItem   : null
 
+    PreTreatmentFilterFlush     { id:        _preTreatmentFilterFlush   }
+
     PreTreatmentPrime           { id:        _pretreatmentPrime
-        onBackClicked           : {vTreatmentCreate.doRequestPop()       }
-        onContinueClicked       : {vTreatmentCreate.doFinishedPrime();   }
+        onBackClicked           : {vTreatmentCreate.doRequestPop()      }
+        onContinueClicked       : {vTreatmentCreate.doFinishedPrime();  }
     }
 
     PreTreatmentUltrafiltration { id:        _pretreatmentUltrafiltration
-        onBackClicked           : {vTreatmentCreate.doRequestPop()       }
+        onBackClicked           : {vTreatmentCreate.doRequestPop()      }
         onStartClicked          : {vTreatmentAdjustmentUltrafiltrationInit.doAdjustment(_pretreatmentUltrafiltration.ufVolume) }
     }
 
@@ -55,7 +57,7 @@
     }
 
     Connections { target: vHDOperationMode
-        onPreTreatmentChanged : { if ( vpreTreatment ) { page( _pretreatmentPrime )}}
+        onPreTreatmentChanged : { if ( vpreTreatment ) { page( _preTreatmentFilterFlush )}}
     }
     onVisibleChanged: {
         if (visible) {