If water does not break down what do you call it when it steams @212°? Also how is the common man to know what parts are rated at the correct pressure to match the type of coolant mix in his radiator? Most of us never put a thought into it, we trust that what the car comes with is correct but what about years later when you change it yourself? From all my research the actual proper way to use regular old coolant is to match it to you engine with parts rated for such potential pressures. I think we've all seen that upper radiator hose grow like it's pregnant before it pops lol ,my experience was a high speed run from a left turn to 120 mph and for whatever reason either my high flow pump worked to well that it sucked the lower hose closed and caused the temps to go so high so fast the the water green mix steamed and built pressures so fast that the only relief was a freeze plug, and it released all right all over the road. Since those types of fun romps are usually on my agenda when I take my car out on weekends I liked the fact that the evans has no pressure. Like I said to each is own and everyone's configuration is different and where we live is a factor as well.