Check Connections
While not foolproof, this command checks for missing connections between pipes. By studying the following two figures, can you identify what is wrong with the modeling shown below? Check connections command will.

By studying the previous Layout window, you will notice that even though node 50 appears to be on the header (node 10 to node 25), it actually is not. Node 10 connects directly to node 20 which further connects to node 25. The loop begins from node 20 and goes up to node 50. But node 50 is not defined on the header. So, there is no connection between the loop and the header!
When you run the Check connections command, you get the following message.

So, you might want to run this command on complicated models with loops just to ensure that all such connections are properly modeled.
Corrected modeling is shown next. Notice that node 50 is now defined as part of the header from node 10 to node 25.
