Y adapter for fresh water at park water supply post?

I hook up a Y to provide fresh water for making coffee or to fill a bucket for dousing the campfire.

I would never hook up from the campsite fresh water to do any flushing. That's what the dumpsite is for.

In fact, I won't even hook up to fresh water spigots that are too close to the black water drain.

Think of the person who comes after you, not whether you will survive your own misuse.