Index: sources/gui/qml/pages/settings/SettingsStack.qml
===================================================================
diff -u -r4eecbe25c905517c495c69ad9524ffdc7ffe181a -r8ee8ce1e868b66dd0ae197ef7a947e0436037ef3
--- sources/gui/qml/pages/settings/SettingsStack.qml	(.../SettingsStack.qml)	(revision 4eecbe25c905517c495c69ad9524ffdc7ffe181a)
+++ sources/gui/qml/pages/settings/SettingsStack.qml	(.../SettingsStack.qml)	(revision 8ee8ce1e868b66dd0ae197ef7a947e0436037ef3)
@@ -15,6 +15,7 @@
 
 // Qt
 import QtQuick                  2.12
+import QtQuick.Controls         2.12 // Switch
 
 // Project
 import Gui.Actions 0.1
@@ -48,6 +49,7 @@
         Services        ,
         SetDateTime     ,
         ExportLogs      ,
+        RoInput         ,
         Language        ,
         Calibration     ,
         SWUpdate        ,
@@ -62,6 +64,7 @@
         qsTr("Service"                      ), // Service
         qsTr("Set Date And Time"            ), // SetDateTime
         qsTr("Export Logs"                  ), // ExportLogs
+        qsTr("Water Input Mode"             ), // RoInput
         qsTr("Set Language"                 ), // Language
         qsTr("Calibration "                 ), // Calibration
         qsTr("Software Update"              ), // SWUpdate
@@ -76,6 +79,7 @@
         true                                 , // Services
         true                                 , // SetDateTime
         true                                 , // ExportLogs
+        true                                 , // RoInput
         false                                , // Language
         false                                , // Calibration
         false                                , // SWUpdate
@@ -90,6 +94,7 @@
       ! serviceMode                          , // Services
         serviceMode                          , // SetDateTime
         true                                 , // ExportLogs
+        true                                 , // RoInput
         false /* serviceMode phase 1 */      , // Language
         false /* serviceMode phase 1 */      , // Calibration
         false /* serviceMode phase 1 */      , // SWUpdate
@@ -145,6 +150,10 @@
                 push( _settingsExportLogs )
                 break
 
+            case SettingsStack.RoInput:
+                push( _settingsRoInput )
+                break
+
             default:
                 console.debug("Unknown Index", vIndex)
                 break
@@ -236,6 +245,73 @@
         itemIndex               : SettingsStack.ExportLogs
     }
 
+    SettingsBase                { id: _settingsRoInput
+        confirmVisible          : false
+        itemIndex               : SettingsStack.RoInput
+
+
+        Row { id: _settingsRoInputRow
+            anchors.centerIn: parent
+
+            Text { id           : _settingsRoInputLabel
+                text            : qsTr("Pure Water Mode")
+                width           : 300
+                height          : _settingsRoInputSwitch.height
+                color           : Colors.white
+                font.pixelSize: Fonts.fontPixelButton
+                verticalAlignment       : Text.AlignVCenter
+                horizontalAlignment     : Text.AlignLeft
+            }
+
+            Switch { id: _settingsRoInputSwitch
+                property bool active: true
+                onCheckedChanged: {
+                    if ( ! active ) active = true
+                    vSettings.roWaterMode = checked
+                }
+
+                checked : vSettings.roWaterMode
+
+                width   : 85
+                height  : 85
+
+                indicator: Rectangle {
+                    implicitWidth   : Variables.sliderCircleDiameter * 1.7
+                    implicitHeight  : Variables.sliderCircleDiameter - ( Variables.progressbarHandlerBorderWidth * 2 )
+                    radius          : implicitHeight
+                    anchors.centerIn: parent
+                    color           : _settingsRoInputSwitch.checked ? Colors.backgroundButtonSelect  : Colors.createTreatmentInactive
+                    border.color    : _settingsRoInputSwitch.checked ? Colors.borderButton            : Colors.createTreatmentInactive
+                    Rectangle {
+                        property real diameter  : Variables.sliderCircleDiameter
+                        x: _settingsRoInputSwitch.checked ? parent.width - width : 0
+                        anchors.verticalCenter: parent.verticalCenter
+                        width   : diameter
+                        height  : diameter
+                        radius  : diameter
+                        color   : _settingsRoInputSwitch.active ? Colors.highlightProgressBar : Colors.createTreatmentInactive
+                        border  {
+                            width: Variables.progressbarHandlerBorderWidth
+                            color: Colors.textMain
+                        }
+                    }
+                }
+
+                contentItem: Text {
+                    width   : parent.width
+                    height  : parent.height
+                    text    : _settingsRoInputSwitch.checked ? qsTr("ON") : qsTr("OFF")
+                    font.pixelSize: Fonts.fontPixelButton
+                    color   : _settingsRoInputSwitch.active  ? Colors.textMain : Colors.textDisableButton
+                    verticalAlignment       : Text.AlignTop
+                    horizontalAlignment     : Text.AlignHCenter
+                    // anchors.bottom          : parent.top
+                    // anchors.verticalCenter  : parent.verticalCenter
+                }
+            }
+        }
+    }
+
     UserConfirmation            { id: _servicePassword
         property bool isPassword_Accepted   : false
         property bool isDefaultPasswordSet  : (vSettings.servicePass != "")