The plumber is an application developed using vuejs and it is developed by Erwin Werkman. It’s a very useful tool to see the inside of your Sitecore XC Engine.
It enlists all the pipelines in the lexical order. Since it is hosted as a separate web application it’s easier to use. To install and use Plumber just follow the instruction given by Erwin on his Github repository.
It gives you an insight into how the engine is configured.
Very useful is you have to customize and create a lot of Sitecore XC plugins.
Show the flow of all the pipeline you can dotpeek and understand the complete flow.
A visual flow always proved more effective and informative instead of hoping within Visual Studio of DotPeek to understand the complete floaw.