How does an overflow bottle recirculate the overflow back into the cooling system? I was thinking about just using a catch can, so that in the event of a boil over or puke episode, that it wouldn't spray all over everything. Right now I just have a length of 1/2" clear tubing with some braided steel over it, and it has made a mess of things. Seems like a JY run might score me some sort of restorable holding vessel. Is there any sort of real advantage to having one that can put the fluid back into the radiator?
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