Here is a complete listing of the example source file.
import QtQuick 2.11
import QtQuick.Controls 2.4
import QtQuick.Layouts 1.3
 
 
Rectangle {
    id: root
 
    anchors.fill: parent
 
    color: Theme.palette.background
 
    Pipe {
        from: PipeConnector {
            x: 20
            y: 20
        }
 
        to: PipeConnector {
            x: 200
            y: 20
        }
    }
 
    PipeConnector {
        id: verticalA
 
        x: 300
        y: 20
    }
 
    PipeConnector {
        id: verticalB
        x: 300
        y: 200
    }
 
    Pipe {
        from: verticalA
        to: verticalB
    }
 
    Rectangle {
        id: red
 
        x: 400
        y: 20
 
        width: 40
        height: 40
        color: "red"
        border.width: 1
 
        property PipeConnector outlet: PipeConnector {
            x: 40
            y: 20
            parent: red
        }
    }
 
    Rectangle {
        id: blue
 
        x: 600
        y: 20
 
        width: 40
        height: 40
        color: "blue"
        border.width: 1
 
        property PipeConnector inlet: PipeConnector {
            x: 0
            y: 20
            parent: blue
        }
    }
 
    Pipe {
        from: red.outlet
        to: blue.inlet
 
        color.interior: ["red", "blue"]
    }
 
    Rectangle {
        id: green
 
        x: 700
        y: 20
 
        width: 40
        height: 40
        color: "green"
        border.width: 1
 
        rotation: 90
 
        property PipeConnector outlet: PipeConnector {
            x: 40
            y: 20
            parent: green
        }
    }
 
    Rectangle {
        id: orange
 
        x: 700
        y: 200
 
        width: 40
        height: 40
        color: "orange"
        border.width: 1
 
        rotation: 90
 
        property PipeConnector inlet: PipeConnector {
            x: 0
            y: 20
            parent: orange
        }
    }
 
    Pipe {
        from: green.outlet
        to: orange.inlet
 
        color.interior: ["green", "orange"]
    }
 
    
    Tee {
        id: tee
 
        x: 100
        y: 300
 
        color.interior: "yellow"
    }
 
    Tee {
        id: teeFlip
 
        x: 200
        y: 300
 
        rotation: 180
 
        color.interior: "yellow"
    }
 
    Elbow {
        id: elbow
 
        x: 300
        y: 300
 
        color.interior: "yellow"
    }
 
    Elbow {
        id: elbow90
 
        x: 300
        y: 400
        rotation: 90
 
        color.interior: "yellow"
    }
 
    Elbow {
        id: elbow180
 
        x: 100
        y: 400
        rotation: 180
 
        color.interior: "yellow"
    }
 
    PipeEnd {
        id: leftEnd
 
        x: 20
        y: 300
 
        color.interior: "yellow"
    }
 
    PipeEnd {
        id: topEnd
 
        x: 200
        y: 250
        rotation: 90
 
        color.interior: "yellow"
    }
 
    Pipe {
        from: leftEnd.connector.sideB
        to: tee.connector.sideA
 
        color.interior: "orange"
    }
 
    Pipe {
        from: tee.connector.sideB
        to: teeFlip.connector.sideB
 
        color.interior: "orange"
    }
 
    Pipe {
        from: teeFlip.connector.sideA
        to: elbow.connector.sideA
 
        color.interior: "orange"
    }
 
    Pipe {
        from: elbow.connector.sideB
        to: elbow90.connector.sideA
 
        color.interior: "orange"
    }
 
    Pipe {
        from: elbow90.connector.sideB
        to: elbow180.connector.sideA
 
        color.interior: "orange"
    }
 
    Pipe {
        from: elbow180.connector.sideB
        to: tee.connector.middle
 
        color.interior: "orange"
    }
 
    Pipe {
        from: teeFlip.connector.middle
        to: topEnd.connector.sideB
 
        color.interior: "orange"
    }
 
    Tee {
        id: tee_2
 
        x: 400
        y: 300
 
        color.interior: "pink"
    }
 
    Tee {
        id: teeFlip_2
 
        x: 500
        y: 300
 
        rotation: 180
 
        color.interior: "pink"
    }
 
    Elbow {
        id: elbow_2
 
        x: 600
        y: 300
 
        color.interior: "pink"
    }
 
    Elbow {
        id: elbow90_2
 
        x: 600
        y: 400
        rotation: 90
 
        color.interior: "pink"
    }
 
    Elbow {
        id: elbow180_2
 
        x: 400
        y: 400
        rotation: 180
 
        color.interior: "pink"
    }
 
    PipeEnd {
        id: leftEnd_2
 
        x: 320
        y: 300
 
        color.interior: "pink"
    }
 
    PipeEnd {
        id: topEnd_2
 
        x: 500
        y: 250
        rotation: 90
 
        color.interior: "pink"
    }
 
    Cap {
        id: topCap_2
 
        x: 500
        y: 200
 
        color.interior: "pink"
        rotation: -90
    }
 
    Pipe {
        from: leftEnd_2.connector
        to: tee_2.connector
 
        color.interior: "violet"
    }
 
    Pipe {
        from: tee_2.connector
        to: teeFlip_2.connector
 
        color.interior: "violet"
    }
 
    Pipe {
        from: teeFlip_2.connector
        to: elbow_2.connector
 
        color.interior: "violet"
    }
 
    Pipe {
        from: elbow_2.connector
        to: elbow90_2.connector
 
        color.interior: "violet"
    }
 
    Pipe {
        from: elbow90_2.connector
        to: elbow180_2.connector
 
        color.interior: "violet"
    }
 
    Pipe {
        from: elbow180_2.connector
        to: tee_2.connector
 
        color.interior: "violet"
    }
 
    Pipe {
        from: teeFlip_2.connector
        to: topEnd_2.connector
 
        color.interior: "violet"
    }
 
    Pipe {
        from: topEnd_2.connector
        to: topCap_2.connector
 
        color.interior: "violet"
    }
}