Index: sources/gui/qml/pages/pretreatment/connection/PreTreatmentUltrafiltration.qml
===================================================================
diff -u -r6e9dccd1109d9c8d4ee4b6a21260618969a1706b -r74134f8b53c3b71dc91c67ed723db8c29d4d4e69
--- sources/gui/qml/pages/pretreatment/connection/PreTreatmentUltrafiltration.qml	(.../PreTreatmentUltrafiltration.qml)	(revision 6e9dccd1109d9c8d4ee4b6a21260618969a1706b)
+++ sources/gui/qml/pages/pretreatment/connection/PreTreatmentUltrafiltration.qml	(.../PreTreatmentUltrafiltration.qml)	(revision 74134f8b53c3b71dc91c67ed723db8c29d4d4e69)
@@ -29,9 +29,16 @@
 PreTreatmentBase { id: _root
     objectName: "_PreTreatmentUltrafiltration"
 
-    property alias  ufVolume    : _volumeSlider.value
+    property alias  ufVolume : _volumeSlider.value
 
     header.confirmEnabled: _volumeSlider.isActive
+    onVisibleChanged: {
+        /*
+        It is only for the dry-demo due to its independent flow.
+        Otherwise, won't needed in the normal designed user-flow.
+        */
+        clear()
+    }
 
     function reset( vValue ) {
         if ( ! handleMinimum( vValue ) ) // if not handled go next
@@ -95,7 +102,8 @@
             top: parent.top
             topMargin: 425
         }
-        isActive: false
+        // The UF is active by default if the dryDemoMode
+        isActive: _GuiView.dryDemoMode
         width   : Variables.ultrafiltrationProgressbarWidth
         step    : 0.100
         stepSnap: true
@@ -136,5 +144,4 @@
             _volumeSlider.isActive = true
         }
     }
-
 }