Terry, that sounds like I would be making an excuse to go back just for the scenery. If you run the water while or immediatly before feeling of the lines or hitting it with your laser therm. you will find the flow pattern in actuallity, not just how it is labled. When cold water flows in, the cold line will cool rapidly.
Good Luck,
Jim

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Jim Luttrall
Mr. Inspector.net, Inc.
Allen, Texas 75002