There you go again looking into your CRT to "see" what goes on with my systems. I get flow and the effects of a higher level of antifreeze. I just pay my insurance premium and sleep well. Did you know they make pumps bigger than a 26-99? Just because you have never seen a burst barrel, does not mean that it is impossible You have more faith in thermistors than I do. They are my customers keep your nose out of our interactions.