Well right after I finished washing the bus I heard a loud pop and the sound of air gushing out from under the bus! I waited a couple days to jump under and see what line blew up since it was raining the last couple days(go figure, since I just washed it).
I fired up the bus to build a bit of air pressure and shut it down. Sure enough a loud hissing right below the driver seat. I crawled under and found this.
The leak is coming from the front air tank and it’s not coming from a line. See next pic.
There is the hole in between the bracket, the dark rust spot surrounded by the light colored rust. Dangit. I took some measurements of the tank and found it to be close to a 5gl tank. So now to scour the internet to find a suitable tank.
Pulled the tank out to assess the damage.
Odd, it almost appears that it was blown out in the inside. The rest of the tank was still shiny except for this one spot.
I found a suitable tank that should work and got it on order. It should be here next week.