Hey. My service line was spliced together so I decided to put a new valve on today. It's the valve on the back of the tractor that the air lines go in to and then go to the trailer. But the blue line is too big for the valve. Red goes in fine. Blue line from tractor is 5/8. I think the valve is for a 1/2. Do you think someone would have changed that line to a bigger line. I bought the part from international, so it's a oem part. Thanks for any info.