I'll bet you Prime Time will be the first to have this in their new "How To" videos.
It really wouldn't be hard either. It should be part of the responsibility of every Forest River project manager in charge of each line.
Edit: A post on another thread reminded of these videos from by Mark Polk
. They give the basics and provide a framework that can be used for a specific rig. You may have to do more or less depending on your rig but you get the idea.
There's one for Sanitizing the FW tank and lines.