Index: sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateTreatmentSettings.qml
===================================================================
diff -u -r0797b3a8c28ad756be125a91c45fb53a2783dc9a -r82b22f0f0ae1ff5b0a5c1524c7e91cc8d667b180
--- sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateTreatmentSettings.qml	(.../PreTreatmentCreateTreatmentSettings.qml)	(revision 0797b3a8c28ad756be125a91c45fb53a2783dc9a)
+++ sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateTreatmentSettings.qml	(.../PreTreatmentCreateTreatmentSettings.qml)	(revision 82b22f0f0ae1ff5b0a5c1524c7e91cc8d667b180)
@@ -277,6 +277,10 @@
             onDidChange         : function(vValue) {
                 if ( ! _ufVolume.valid ) { vTreatmentCreate.ufVolumeRejectionReason = Variables.noRejectReason }
                 vTreatmentCreate.ultrafiltrationVolume = vValue
+
+                // zero weight if UF volume is entered
+                vTreatmentCreate.ufEstimatedTargetWeight    = 0
+                vTreatmentCreate.ufPreWeight                = 0
             }
 
             onEditClicked   :_ufVolumeAdjustment.open()