Quote Originally Posted by Clue69Less View Post
I'll stick with my simple ball valve. It has 1/4" BPT and no restrictions when open. And it was cheap - 9 bucks. Sort of like McMaster-Carr 4093T23 but 1/4 BPT.
I think I see what you mean, you're going to use a plastic wye and just shut off flow to the chiller with it in parallel to your main loop? You are going to use a second ball valve to shut off flow to the radiator right? If not they're just going to fight each other at ambient and the radiator is likely to have a lot more capacity than the TECs.