by bdring » Fri Sep 21, 2012 4:02 pm
I ran mine for several month in my unheated garage in Chicago. I always use anti-freeze, even in the warm house. I really like the color, because it helps spot bubbles. I use 50-50 with the eco friendly type anti freeze.
If you just turn on the system and let the pump run for a few minutes there should be no issues with shock. All parts should have stabilized at the same temp before hand. I suppose if you did a long run and the fluid got hot, then you turned it off, the tube could cool quicker then be shocked when the warm fluid returned. If that is the case, just let the system naturally cool down. I rarely ever see the fluid got seriously hot though even with my bucket system.
Bart
"If you didn't build it, you will never own it."