How to Model a Reducer with a Branch Connection

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To split the reducer into 2 parts, add additional node 3 and change the diameter of the intermediate pipe 4-3

Now add two reducers into nodes 3 and 4

To add the branch into the intermediate node, add two more nodes 5 and 6 with a distance of 1 mm from each other. And increase the length of the pipe 3-4 by 2 millimeters

Now add the branch pipe into the node 5. And insert stub-in, joint or custom tee into the node 5