Here's what you can expect when you clean a PA 120.3 rad with 5% distilled white vinegar.



I'm now on my sixth pass and third gallon of vinegar and somehow not feeling incredibly optimistic that this will be the time when I get clear vinegar coming out. It just doesn't seem to be getting any better.

At least the fifth time appears to have less sediment settled at the bottom - but then again maybe I just haven't given it enough time to settle.