I'm using a bulk head that would be used for hotwater for a washing machine as a bulkhead in my cooler. It worked pretty well, maybe the flow was a bit slower than I would have liked, but thar's fine. I know plated nickel can be pretty nasty, but don't think I would need to worry about it at mash temperatures. Usually it would degrade at higher temps and is a concern in industrial settings...would you be concerned?