If the only portion of he fill hose that cannot be seen is not visible for the one foot distance that you described, then I would, if encountering the same problem, disconnect both ends of the hose, secure a line to one end of the hose VERY SECURELY so that it will not come loose when pulling. Pull the hose thru it's path to the other end. Then, secure the line to the replacement hose and pull it back thru the vacated trail of the old hose.