[rheavn]

The feed lines to the pocket doors and the toilets are 1/4" BLACK air line.  These two air lines in question are 1/4" WHITE air line.  I  don't know what Newell's reason for changing the color of the line was, but I think there must be a reason.  It becomes difficult to discern the white air lines from the white romex as it gets further away.  There are a couple of closeup pictures of the two air lines as they are running horizontally on the wall behind the refrigerator.  Although the line is DOT air line, it is marked differently than the black air line.

The line going to the air bladders' regulator is 1/4" black air line and runs through the basement.