So, I'm redoing my basement and I currently have an old propane fireplace insert down there which I plan on using, but I'm curious how a new install would happen? All the photos I see online for these inserts have no exposed pipe. Isn't it code to have a shutoff valve inside somewhere? Otherwise, I would just be able to drill through the back of the fireplace and run the pipe directly to the rear of the insert. What am I missing here?