[AStonesThrow]

But you can't then say unqualified that "water is fungible". Sewer water is not fungible with potable water. Greywater is not fungible with distilled or RO water. I'm not convinced that sewer water is fungible at all, considering its unknown content!

[samatman]

People do this all the time actually. "Cotton is fungible", "oil is fungible".

The grading is assumed.

[AStonesThrow]

I will remember this next time Amazon tries to ship me Artesian Spring Deuterium or Tritium to me, and extra shipping/handling charges apply

There are two tremendous storage reservoirs full of dihydrogen monoxide here, but only the cats and toddlers drink it. Birds have wised up.