I just had a slab leak repaired in my garage area....instead of cutting into the slab the plumber capped off the leaking pipe and re-routed the pipe. I am just curious whether it is standard procedure to re-route the pipe on the outside of the wall? This was done in the garage area so the pipe runs along the ceiling on the outside of the wall. I was told by another plumber that this is not "code". That the pipe should have been run inside the wall and I could have a problem during an inspection if I ever wanted to sale my place.