Cleaning Plate Chiller

+1

I’d believe it.  People who have baked their chiller and carbonized whatever hop or protein deposits are inside find that black water does come out for a while.  Is that a problem, though?  Probably not, as long as you pasteurize it with some hot wort recirculation.  When I used a plate chiller, I didn’t trust just using sanitizer because most of the ones we use as homebrewers are quickly inactivated by organic material.