I have a hose connected to the water box drain I have been known to use to fill things here and there. And I've had it come loose and submerge my sock and I know the feeling of trying to get it off ASAP....I don't know if it was quite 160 but it was pretty darn hot. Left a good red mark on my ankle.
On another note I have burned myself many times on my wand and quick connects and have had blisters from them. I use the safe connect on my lead hose but still you can get burned, I usually get the burn from the QC on my wand when I go to lay it down. In fact I have a small burn on my wrist from one right now....it only hurt for maybe a few hours though.