Ruby should take a closer look at that pipe. Is the blue stripe painted on, or is that a window to the interior? If the latter, what's in there?
Not a bad idea. Check the blue stripe on the tube.
>Ruby should take a closer look at that pipe. Is the blue stripe painted on, or is that a window to the interior? Upon close inspection, the pipe running from the ceiling to the east wall is painted with a blue stripe, probably for identification purposes.